Crystal structure of Boc-(S)-ABOC-(S)-Ala-(S)-ABOC-(S)-Phe-OBn chloro­form monosolvate

Wenger, E.; Moulat, L.; Legrand, B.; Amblard, M.; Calmès, M.; Didierjean, C.

doi:10.1107/S2056989015016941

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ISSN: 2056-9890

Volume 71| Part 10| October 2015| Pages 1193-1195

doi:10.1107/S2056989015016941

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Crystal structure of Boc-(S)-ABOC-(S)-Ala-(S)-ABOC-(S)-Phe-OBn chloroform monosolvate

Emmanuel Wenger,^a,^b Laure Moulat,^c Baptiste Legrand,^c Muriel Amblard,^c Monique Calmès ^c and Claude Didierjean ^a,^b ^*

^aUniversité de Lorraine, UMR 7036 CRM2, Vandoeuvre-lès-Nancy, France, ^bCNRS, UMR 7036 CRM2, Vandoeuvre-lès-Nancy, France, and ^cIBMM, UMR 5247 CNRS-Université Montpellier–ENSCM, 15 avenue Charles Flahault, 34093 Montpellier Cedex 5, France
^*Correspondence e-mail: claude.didierjean@univ-lorraine.fr

Edited by H. Ishida, Okayama University, Japan (Received 25 August 2015; accepted 10 September 2015; online 17 September 2015)

In the title compound, phenyl (S)-2-[(S)-(1-{2-[(S)-(1-{[(tert-butoxy)carbonyl]amino}bicyclo[2.2.2]octan-2-yl)formamido]propanamido}bicyclo[2.2.2]octan-2-yl)formamido]-3-phenylpropanoate chloroform monosolvate, C₄₂H₅₆N₄O₇·CHCl₃, the α,β-hybrid peptide contains two non-proteinogenic amino acid residues of (S)-1-aminobicyclo[2.2.2]octane-2-carboxylic acid [(S)-ABOC], two amino acid residues of (S)-2-aminopropanoic acid [(S)-Ala] and (S)-2-amino-3-phenylpropanoic acid [(S)-Phe], and protecting groups of tert-butoxycarbonyl (Boc) and benzyl ester (OBn). The tetramer folds into a right-handed mixed 11/9 helix stabilized by intramolecular i,i + 3 and i,i − 1 C=O⋯H—N hydrogen bonds. In the crystal, the oligomers are linked by N—H⋯O=C hydrogen bonds into chains along the a-axis direction. The chloroform solvent molecules are intercalated between the folded chains via C—H⋯O=C interactions.

Keywords: crystal structure; α,β-hybrid peptide; (S)-1-aminobicyclo[2.2.2]octane-2-carboxylic acid; (S)-ABOC; (S)-Ala; (S)-Phe; Boc; OBn; 11/9 helix; hydrogen bonding.

CCDC reference: 1423394

1. Chemical context

The title compound is an α,β-hybrid tetrapeptide with alternating proteogenic α-amino acid and ABOC residues. (S)-1-aminobicyclo[2.2.2]octane-2-carboxylic acid [(S)-ABOC] is a β^2,3,3-trisubstituted bicyclic amino acid which exhibits a high propensity to induce both a reverse turn into short peptides and helices in oligoureas and in α,β-hybrid peptides (Songis et al., 2007 ; André et al., 2012 , 2013 ; Legrand et al., 2012 , 2014 ). In our last study we showed that short oligomers adopted an 11/9 helix, whereas an 18/16 helix was favored for longer oligomers in solution. NMR studies suggested a rapid interconversion between the 11/9 helix and the 18/16 helix for oligomers of intermediate length. In the solid state, only the 11/9 helix has been observed whatever the length of the oligomers capped by an iPrCO and an OBn group (Legrand et al., 2014).

2. Structural commentary

For the title compound (Fig. 1), the triclinic unit cell consists of one molecule of α,β-hybrid tetramer and one molecule of chloroform. The oligomer exhibits a right-handed mixed 11/9 helix stabilized by backbone C=O⋯HN hydrogen bonds (Table 1), forming one C11 pseudocycle between the CO of the β-residue (i) and the NH of the α-residue (i + 3) and two C9 pseudocycles between the CO of the α-residue (i) and the NH of the β-residue (i − 1). The backbone torsion angles are quite similar to those of the characteristic 11/9 helix reported in the same α,β-hybrid oligomers (Legrand et al., 2014) and other α/β-peptides (Lee et al., 2013 ).

Table 1
Hydrogen-bond geometry (Å, °)

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1⋯O4	0.88	2.16	2.994 (4)	157
N2—H2⋯O5ⁱ	0.88	2.12	2.914 (3)	150
N3—H3N⋯O6	0.88	2.51	3.159 (3)	131
N4—H4⋯O3	0.88	2.20	3.009 (3)	153
C1′—H1′⋯O2	1.00	2.09	3.071 (4)	167
Symmetry code: (i) x+1, y, z.

Figure 1
The molecular structure of the title compound showing the atom-numbering scheme. All non-H atoms are represented by 25% probability displacement ellipsoids. H atoms are omitted for clarity.

3. Supramolecular features

The intermolecular interaction N2—H2⋯O5ⁱ (Table 1) connects the title α,β-hybrid tetramer to form infinite chains along the a-axis direction (Fig. 2). In the ac plane the chloroform molecules link the chains via a C—Cl⋯N interaction [Cl⋯N = 3.281 (3) Å] and a C—H⋯O hydrogen bond [C⋯O = 3.071 (4) Å].

Figure 2
Partial packing view of the title compound in the ac plane. Only selected H atoms are shown for clarity. Intramolecular hydrogen bonds are shown as magenta dashed lines. Intermolecular strong hydrogen bonds are shown as black dashed lines. Intermolecular weak hydrogen bonds are shown as red dashed lines. Intermolecular C—Cl⋯N interactions are shown as orange dashed lines.

4. Comparison with related structures

The crystals of the title compound and those of the same tetramer with the N-terminal capping group iPrCO instead of Boc are not isomorphous. This latter crystallized in the space group P2₁ with two independent molecules in the asymmetric unit. One independent molecule shows a single fully folded 11/9 helix as the title compound while the hydrogen-bond network is incomplete in the other molecule. The last C9 hydrogen bond between the carbonyl of the Phe residue and the β-residue amide proton was disrupted by the incorporation of a water molecule (Legrand et al., 2014). This intercalation of water molecules has already been observed in oligoureas (Legrand et al., 2012) and highlighted in an enzyme involved in the mitochondrial respiratory chain i.e. the mitochondrial bc1 complex. Its bovine crystal structure (Huang et al., 2005 ) revealed that an intercalated water molecule in an α-helix took part in the stabilization of the high potential cytochrome b heme. Usually, α-helices interact laterally with their side chains. Water molecules adsorption on an α-helice groove is an alternative tool available to the helical system to interact with partners.

For further related articles on hybrid peptides, see: Hayen et al. (2004 ); Sharma et al. (2009 ); Vasudev et al. (2011 ); Berlicki et al. (2012 );

5. Synthesis and crystallization

The synthesis of the title compound has recently been reported by Legrand et al. (2014). Single crystals were obtained by slow evaporation of a chloroform solution.

6. Refinement

Crystal data, data collection and structure refinement details are summarized in Table 2. All H atoms were located in a difference Fourier map. The C/N-bonded H atoms were placed at calculated positions and refined using a riding model, with C—H = 0.95–1.00 Å and N—H = 0.88 Å. The U_iso(H) parameters were fixed at 1.2U_eq(C, N) for methine, methylene, aromatic groups and NH groups, and at 1.5U_eq(C) for methyl groups.

Table 2
Experimental details

Crystal data
Chemical formula	C₄₂H₅₆N₄O₇·CHCl₃
M_r	848.27
Crystal system, space group	Triclinic, P1
Temperature (K)	100
a, b, c (Å)	9.2194 (6), 10.8908 (6), 11.8698 (7)
α, β, γ (°)	63.489 (2), 86.467 (2), 89.069 (2)
V (Å³)	1064.38 (11)
Z	1
Radiation type	Mo Kα
μ (mm⁻¹)	0.27
Crystal size (mm)	0.4 × 0.1 × 0.1

Data collection
Diffractometer	D8 Venture Bruker
Absorption correction	Multi-scan (SADABS; Bruker, 2014 )
T_min, T_max	0.908, 0.963
No. of measured, independent and observed [I > 2σ(I)] reflections	42849, 8712, 8015
R_int	0.037
(sin θ/λ)_max (Å⁻¹)	0.626

Refinement
R[F² > 2σ(F²)], wR(F²), S	0.038, 0.087, 1.08
No. of reflections	8712
No. of parameters	518
No. of restraints	3
H-atom treatment	H-atom parameters constrained
Δρ_max, Δρ_min (e Å⁻³)	0.30, −0.32
Absolute structure	Flack x determined using 3702 quotients [(I⁺)−(I⁻)]/[(I⁺)+(I⁻)] (Parsons et al., 2013 )
Absolute structure parameter	0.006 (18)
Computer programs: APEX2 and SAINT (Bruker, 2014), SIR2008 (Burla et al., 2007 ), SHELXL2014 (Sheldrick, 2015 ), Mercury (Macrae et al., 2008 ), pyMOL (DeLano, 2002 ), WinGX (Farrugia, 2012 ) and enCIFer (Allen et al., 2004 ).

Supporting information

CCDC reference: 1423394

Crystal structure: contains datablocks global, I. DOI: 10.1107/S2056989015016941/is5415sup1.cif

Structure factors: contains datablock I. DOI: 10.1107/S2056989015016941/is5415Isup2.hkl

Supporting information file. DOI: 10.1107/S2056989015016941/is5415Isup3.cml

checkCIF report

Chemical context top

The title compound is an α,β-hybrid tetrapeptide with alternating proteogenic α-amino acid and ABOC residues. (S)-1-aminobicyclo[2.2.2]octane-2-carboxylic acid [(S)-ABOC] is a β^2,3,3-trisubstituted bicyclic amino acid which exhibits a high propensity to induce both a reverse turn into short peptides and helices in oligoureas and in α,β-hybrid peptides (Songis et al., 2007; André et al., 2012, 2013; Legrand et al., 2012, 2014). In our last study we showed that short oligomers adopted an 11/9 helix, whereas an 18/16 helix was favored for longer oligomers in solution. NMR studies suggested a rapid interconversion between the 11/9 helix and the 18/16 helix for oligomers of intermediate length. In the solid state, only the 11/9 helix has been observed whatever the length of the oligomers capped by an iPrCO and an OBn group (Legrand et al., 2014).

Structural commentary top

For the title compound (Fig. 1), the triclinic unit cell consists of one molecule of α,β-hybrid tetramer and one molecule of chloroform. The oligomer exhibits a right-handed mixed 11/9 helix stabilized by backbone C═O···HN hydrogen bonds (Table 1), forming one C11 pseudocycle between the CO of the β-residue (i) and the NH of the α-residue (i+3) and two C9 pseudocycles between the CO of the α-residue (i) and the NH of the β-residue (i-1). The backbone torsion angles are quite similar to those of the characteristic 11/9 helix reported in the same α,β-hybrid oligomers (Legrand et al., 2014) and other α/β-peptides (Lee et al., 2013).

The crystals of the title compound and those of the same tetramer with the N-terminal capping group iPrCO instead of Boc are not isomorphous. This latter crystallized in the space group P2₁ with two independent molecules in the asymmetric unit. One independent molecule shows a single fully folded 11/9 helix as the title compound while the hydrogen-bond network is incomplete in the other molecule. The last C9 hydrogen bond between the carbonyl of the Phe residue and the β-residue amide proton was disrupted by the incorporation of a water molecule (Legrand et al., 2014). This intercalation of water molecules has already been observed in oligoureas (Legrand et al., 2012) and highlighted in an enzyme involved in the mitochondrial respiratory chain i.e. the mitochondrial bc1 complex. Its bovine crystal structure (Huang et al., 2005) revealed that an intercalated water molecule in an α-helix took part in the stabilization of the high potential cytochrome b heme. Usually, α-helices interact laterally with their side chains. Water molecules adsorption on an α-helice groove is an alternative tool available to the helical system to interact with partners.

Supramolecular features top

The intermolecular interaction N2—H2···O5ⁱ (Table 1) connects the title α,β-hybrid tetramer to form infinite chains along the a-axis direction. In the plane perpendicular to the b* axis the chloroform molecules link the chains via a C—Cl···N interaction [Cl···N = 3.281 (3) Å] and a C—H···O hydrogen bond [C···O = 3.071 (4) Å].

Comparison with related structures top

The crystals of the title compound and those of the same tetramer with the N-terminal capping group iPrCO instead of Boc are not isomorphous. This latter crystallized in the space group P2₁ with two independent molecules in the asymmetric unit. One independent molecule shows a single fully folded 11/9 helix as the title compound while the hydrogen-bond network is incomplete in the other molecule. The last C9 hydrogen bond between the carbonyl of the Phe residue and the β-residue amide proton was disrupted by the incorporation of a water molecule (Legrand et al., 2014). This intercalation of water molecules has already been observed in oligoureas (Legrand et al., 2012) and highlighted in an enzyme involved in the mitochondrial respiratory chain i.e. the mitochondrial bc1 complex. Its bovine crystal structure (Huang et al., 2005) revealed that an intercalated water molecule in an α-helix took part in the stabilization of the high potential cytochrome b heme. Usually, α-helices interact laterally with their side chains. Water molecules adsorption on an α-helice groove is an alternative tool available to the helical system to interact with partners.

For further related articles on hybrid peptides, see: Hayen et al. (2004); Sharma et al. (2009); Vasudev et al. (2011); Berlicki et al. (2012);

Synthesis and crystallization top

The synthesis of the title compound has recently been reported by Legrand et al. (2014). Single crystals were obtained by slow evaporation of a chloroform solution.

Refinement top

Related literature top

For articles on hybrid peptides, see: Hayen et al. (2004); Sharma et al. (2009); Vasudev et al. (2011); Berlicki et al. (2012); Lee et al. (2013). For synthesis, conformations and structural features of the ABOC residue, see: Songis et al. (2007); André et al. (2012, 2013); Legrand et al. (2012, 2014); Huang et al. (2005).

Computing details top

Data collection: APEX2 (Bruker, 2014); cell refinement: SAINT (Bruker, 2014); data reduction: SAINT (Bruker, 2014); program(s) used to solve structure: SIR2008 (Burla et al., 2007); program(s) used to refine structure: SHELXL2014 (Sheldrick, 2015); molecular graphics: Mercury (Macrae et al., 2008) and pyMOL (DeLano, 2002); software used to prepare material for publication: WinGX (Farrugia, 2012) and enCIFer (Allen et al., 2004).

Figures top

	Fig. 1. The molecular structure of the title compound showing the atom-numbering scheme. All non-H atoms are represented by 25% probability displacement ellipsoids. H atoms are omitted for clarity.
	Fig. 2. Partial packing view of the title compound in the ac plane. Only selected H atoms are shown for clarity. Intramolecular hydrogen bonds are shown as magenta dashed lines. Intermolecular strong hydrogen bonds are shown as black dashed lines. Intermolecular weak hydrogen bonds are shown as red dashed lines. Intermolecular C—Cl···N interactions are shown as orange dashed lines.

Phenyl (S)-2-[(S)-(1-{2-[(S)-(1-{[(tert-butoxy)carbonyl]amino}bicyclo[2.2.2]octan-2-yl)formamido]propanamido}bicyclo[2.2.2]octan-2-yl)formamido]-3-phenylpropanoate chloroform monosolvate top

Crystal data top

C₄₂H₅₆N₄O₇·CHCl₃	Z = 1
M_r = 848.27	F(000) = 450
Triclinic, P1	D_x = 1.323 Mg m⁻³
Hall symbol: P 1	Mo Kα radiation, λ = 0.71073 Å
a = 9.2194 (6) Å	Cell parameters from 9972 reflections
b = 10.8908 (6) Å	θ = 5.7–52.9°
c = 11.8698 (7) Å	µ = 0.27 mm⁻¹
α = 63.489 (2)°	T = 100 K
β = 86.467 (2)°	Needle, colourless
γ = 89.069 (2)°	0.4 × 0.1 × 0.1 mm
V = 1064.38 (11) Å³

Data collection top

D8 Venture Bruker diffractometer	8015 reflections with I > 2σ(I)
φ and ω scans	R_int = 0.037
Absorption correction: multi-scan (SADABS; Bruker, 2014)	θ_max = 26.4°, θ_min = 2.8°
T_min = 0.908, T_max = 0.963	h = −11→11
42849 measured reflections	k = −13→13
8712 independent reflections	l = −14→14

Refinement top

Refinement on F²	Hydrogen site location: inferred from neighbouring sites
Least-squares matrix: full	H-atom parameters constrained
R[F² > 2σ(F²)] = 0.038	w = 1/[σ²(F_o²) + (0.0306P)² + 0.6225P] where P = (F_o² + 2F_c²)/3
wR(F²) = 0.087	(Δ/σ)_max < 0.001
S = 1.08	Δρ_max = 0.30 e Å⁻³
8712 reflections	Δρ_min = −0.32 e Å⁻³
518 parameters	Absolute structure: Flack x determined using 3702 quotients [(I⁺)-(I^-)]/[(I⁺)+(I^-)] (Parsons et al., 2013)
3 restraints	Absolute structure parameter: 0.006 (18)

Crystal data top

C₄₂H₅₆N₄O₇·CHCl₃	γ = 89.069 (2)°
M_r = 848.27	V = 1064.38 (11) Å³
Triclinic, P1	Z = 1
a = 9.2194 (6) Å	Mo Kα radiation
b = 10.8908 (6) Å	µ = 0.27 mm⁻¹
c = 11.8698 (7) Å	T = 100 K
α = 63.489 (2)°	0.4 × 0.1 × 0.1 mm
β = 86.467 (2)°

Data collection top

D8 Venture Bruker diffractometer	8712 independent reflections
Absorption correction: multi-scan (SADABS; Bruker, 2014)	8015 reflections with I > 2σ(I)
T_min = 0.908, T_max = 0.963	R_int = 0.037
42849 measured reflections

Refinement top

R[F² > 2σ(F²)] = 0.038	H-atom parameters constrained
wR(F²) = 0.087	Δρ_max = 0.30 e Å⁻³
S = 1.08	Δρ_min = −0.32 e Å⁻³
8712 reflections	Absolute structure: Flack x determined using 3702 quotients [(I⁺)-(I^-)]/[(I⁺)+(I^-)] (Parsons et al., 2013)
518 parameters	Absolute structure parameter: 0.006 (18)
3 restraints

Special details top

Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'s involving l.s. planes.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å²) top

	x	y	z	U_iso*/U_eq
O1	1.0678 (2)	0.1293 (2)	0.8411 (2)	0.0231 (5)
O2	1.1876 (3)	0.3080 (2)	0.8461 (2)	0.0250 (5)
O3	0.9584 (2)	0.4011 (2)	0.4043 (2)	0.0217 (5)
O4	0.9878 (3)	0.1030 (2)	0.5964 (2)	0.0291 (6)
O6	0.6629 (2)	0.2149 (2)	0.2316 (2)	0.0227 (5)
O5	0.4408 (2)	0.2042 (2)	0.4540 (2)	0.0255 (5)
O7	0.4784 (3)	0.3516 (2)	0.1340 (2)	0.0258 (5)
N1	1.1424 (3)	0.3010 (3)	0.6606 (2)	0.0193 (5)
H1	1.1204	0.2444	0.6294	0.023*
N2	1.1419 (3)	0.2721 (3)	0.3845 (2)	0.0184 (5)
H2	1.2365	0.2643	0.375	0.022*
N3	0.8189 (3)	0.0590 (3)	0.4865 (2)	0.0182 (5)
H3N	0.8047	0.0582	0.4143	0.022*
N4	0.6448 (3)	0.3312 (3)	0.4007 (2)	0.0201 (6)
H4	0.7247	0.354	0.4241	0.024*
C2	1.0641 (4)	0.0413 (3)	0.9781 (3)	0.0247 (7)
C3	0.9992 (4)	0.1148 (4)	1.0520 (3)	0.0320 (8)
H3A	1.0722	0.1771	1.0557	0.048*
H3B	0.9688	0.0472	1.1378	0.048*
H3C	0.9148	0.1676	1.0101	0.048*
C4	1.2169 (4)	−0.0068 (4)	1.0145 (3)	0.0340 (8)
H4A	1.2551	−0.0538	0.9655	0.051*
H4B	1.2152	−0.0701	1.1046	0.051*
H4C	1.2793	0.0726	0.9968	0.051*
C5	0.9658 (5)	−0.0760 (4)	0.9937 (3)	0.0337 (8)
H5A	0.8681	−0.0413	0.9694	0.051*
H5B	0.9609	−0.1455	1.082	0.051*
H5C	1.0048	−0.1171	0.9398	0.051*
C6	1.1374 (3)	0.2516 (3)	0.7879 (3)	0.0188 (6)
C7	1.1821 (3)	0.4427 (3)	0.5718 (3)	0.0184 (6)
C8	1.3291 (3)	0.4874 (3)	0.5974 (3)	0.0209 (6)
H8A	1.4024	0.416	0.6087	0.025*
H8B	1.3192	0.4987	0.6757	0.025*
C9	1.3792 (4)	0.6251 (3)	0.4845 (3)	0.0228 (7)
H9A	1.4202	0.6865	0.5161	0.027*
H9B	1.4557	0.6079	0.4312	0.027*
C10	1.0661 (4)	0.5433 (3)	0.5752 (3)	0.0212 (7)
H10A	1.0424	0.5261	0.6636	0.025*
H10B	0.9763	0.5293	0.5405	0.025*
C11	1.1215 (4)	0.6921 (3)	0.4972 (3)	0.0250 (7)
H11A	1.1538	0.7293	0.554	0.03*
H11B	1.0423	0.7503	0.4483	0.03*
C12	1.2495 (4)	0.6932 (3)	0.4068 (3)	0.0229 (7)
H12	1.2749	0.7893	0.3434	0.027*
C13	1.2037 (4)	0.6084 (3)	0.3410 (3)	0.0209 (6)
H13A	1.273	0.6244	0.2685	0.025*
H13B	1.1059	0.6362	0.3088	0.025*
C14	1.2014 (3)	0.4545 (3)	0.4365 (3)	0.0180 (6)
H14	1.2989	0.4167	0.4283	0.022*
C15	1.0890 (3)	0.3744 (3)	0.4071 (3)	0.0168 (6)
C16	1.0454 (3)	0.1744 (3)	0.3755 (3)	0.0196 (6)
H16	0.9842	0.2224	0.3018	0.024*
C17	1.1352 (4)	0.0646 (3)	0.3577 (3)	0.0259 (7)
H17A	1.0701	−0.002	0.3515	0.039*
H17B	1.1951	0.0176	0.4301	0.039*
H17C	1.1982	0.1078	0.2803	0.039*
C18	0.9468 (3)	0.1090 (3)	0.4981 (3)	0.0197 (6)
C19	0.7011 (3)	0.0056 (3)	0.5867 (3)	0.0201 (6)
C20	0.7585 (4)	−0.0962 (4)	0.7133 (3)	0.0283 (8)
H20A	0.8161	−0.1678	0.7019	0.034*
H20B	0.8229	−0.0474	0.7443	0.034*
C21	0.6307 (4)	−0.1633 (4)	0.8104 (3)	0.0329 (8)
H21A	0.6228	−0.2616	0.8305	0.04*
H21B	0.6476	−0.157	0.8892	0.04*
C22	0.4899 (4)	−0.0907 (4)	0.7570 (3)	0.0291 (8)
H22	0.4081	−0.1283	0.8229	0.035*
C23	0.5919 (3)	−0.0714 (3)	0.5489 (3)	0.0215 (7)
H23A	0.6379	−0.1539	0.5483	0.026*
H23B	0.5616	−0.0117	0.4629	0.026*
C24	0.4578 (4)	−0.1144 (4)	0.6431 (3)	0.0251 (7)
H24A	0.3729	−0.0596	0.6017	0.03*
H24B	0.4344	−0.2125	0.6711	0.03*
C25	0.5078 (4)	0.0630 (4)	0.7147 (3)	0.0293 (8)
H25A	0.5363	0.0786	0.7864	0.035*
H25B	0.4141	0.1091	0.6871	0.035*
C26	0.6258 (4)	0.1254 (3)	0.6041 (3)	0.0208 (7)
H26	0.6998	0.1757	0.6264	0.025*
C27	0.5618 (3)	0.2238 (3)	0.4817 (3)	0.0199 (7)
C28	0.5981 (3)	0.4082 (3)	0.2734 (3)	0.0184 (6)
H28	0.4997	0.4461	0.2785	0.022*
C29	0.7008 (3)	0.5276 (3)	0.1918 (3)	0.0201 (6)
H29A	0.8023	0.4964	0.2074	0.024*
H29B	0.6859	0.5548	0.1019	0.024*
C30	0.6795 (3)	0.6509 (3)	0.2164 (3)	0.0184 (6)
C31	0.7622 (3)	0.6728 (3)	0.3003 (3)	0.0215 (7)
H31	0.8332	0.6077	0.3449	0.026*
C32	0.7416 (4)	0.7892 (3)	0.3191 (3)	0.0234 (7)
H32	0.7984	0.8032	0.3766	0.028*
C33	0.6387 (4)	0.8849 (3)	0.2545 (3)	0.0241 (7)
H33	0.6258	0.9652	0.2663	0.029*
C34	0.5550 (4)	0.8624 (3)	0.1729 (3)	0.0232 (7)
H34	0.4832	0.927	0.1293	0.028*
C35	0.5748 (4)	0.7466 (3)	0.1541 (3)	0.0215 (7)
H35	0.5161	0.7323	0.0978	0.026*
C36	0.5859 (3)	0.3116 (3)	0.2127 (3)	0.0210 (7)
C37	0.4548 (4)	0.2729 (3)	0.0647 (3)	0.0239 (7)
H37A	0.3512	0.2783	0.0456	0.029*
H37B	0.4769	0.1753	0.1182	0.029*
C38	0.5472 (4)	0.3240 (4)	−0.0556 (3)	0.0245 (7)
C39	0.5375 (4)	0.4594 (4)	−0.1454 (4)	0.0319 (8)
H39	0.4758	0.5207	−0.1284	0.038*
C40	0.6175 (5)	0.5056 (5)	−0.2598 (4)	0.0459 (11)
H40	0.6111	0.5985	−0.3209	0.055*
C41	0.7064 (4)	0.4168 (5)	−0.2849 (4)	0.0455 (12)
H41	0.7596	0.4482	−0.3641	0.055*
C42	0.7187 (4)	0.2817 (5)	−0.1953 (4)	0.0383 (9)
H42	0.781	0.2209	−0.2123	0.046*
C43	0.6393 (4)	0.2362 (4)	−0.0806 (3)	0.0284 (8)
H43	0.6482	0.144	−0.0186	0.034*
C1'	1.0834 (4)	0.5291 (4)	0.9249 (3)	0.0258 (7)
H1'	1.132	0.4645	0.8961	0.031*
Cl1'	0.89599 (9)	0.52131 (11)	0.91218 (9)	0.0383 (2)
Cl2'	1.12316 (10)	0.47771 (11)	1.08293 (9)	0.0413 (2)
Cl3'	1.15106 (13)	0.69484 (11)	0.82768 (10)	0.0495 (3)

Atomic displacement parameters (Å²) top

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
O1	0.0315 (13)	0.0226 (12)	0.0123 (11)	−0.0053 (10)	−0.0028 (9)	−0.0049 (9)
O2	0.0315 (13)	0.0266 (12)	0.0178 (11)	−0.0034 (10)	−0.0019 (9)	−0.0107 (10)
O3	0.0192 (12)	0.0247 (12)	0.0221 (12)	0.0005 (9)	−0.0045 (9)	−0.0107 (10)
O4	0.0364 (14)	0.0320 (13)	0.0152 (11)	−0.0141 (11)	−0.0039 (10)	−0.0065 (10)
O6	0.0273 (12)	0.0230 (12)	0.0203 (11)	0.0059 (10)	−0.0049 (9)	−0.0117 (9)
O5	0.0175 (11)	0.0283 (12)	0.0307 (13)	−0.0003 (9)	−0.0002 (9)	−0.0134 (10)
O7	0.0270 (12)	0.0291 (13)	0.0284 (13)	0.0060 (10)	−0.0111 (10)	−0.0183 (11)
N1	0.0228 (14)	0.0205 (13)	0.0144 (13)	−0.0030 (11)	−0.0014 (10)	−0.0076 (11)
N2	0.0145 (12)	0.0208 (13)	0.0193 (13)	−0.0031 (10)	0.0017 (10)	−0.0085 (11)
N3	0.0204 (13)	0.0207 (13)	0.0124 (12)	−0.0024 (11)	−0.0011 (10)	−0.0064 (11)
N4	0.0206 (14)	0.0229 (14)	0.0185 (13)	−0.0018 (11)	−0.0017 (10)	−0.0105 (11)
C2	0.0307 (18)	0.0261 (18)	0.0108 (15)	−0.0006 (14)	−0.0026 (13)	−0.0022 (13)
C3	0.033 (2)	0.043 (2)	0.0204 (17)	−0.0050 (17)	0.0013 (15)	−0.0156 (16)
C4	0.036 (2)	0.034 (2)	0.0256 (19)	0.0067 (16)	−0.0073 (15)	−0.0063 (16)
C5	0.045 (2)	0.0283 (19)	0.0205 (18)	−0.0120 (16)	0.0028 (16)	−0.0042 (15)
C6	0.0206 (15)	0.0198 (15)	0.0149 (14)	−0.0002 (12)	−0.0006 (12)	−0.0069 (12)
C7	0.0208 (16)	0.0194 (15)	0.0153 (15)	−0.0035 (12)	0.0003 (12)	−0.0081 (12)
C8	0.0216 (16)	0.0232 (17)	0.0173 (15)	−0.0031 (13)	−0.0017 (12)	−0.0083 (13)
C9	0.0219 (16)	0.0243 (17)	0.0225 (17)	−0.0079 (13)	0.0009 (13)	−0.0107 (14)
C10	0.0216 (16)	0.0236 (17)	0.0188 (16)	0.0002 (13)	0.0024 (13)	−0.0103 (14)
C11	0.0296 (18)	0.0217 (17)	0.0235 (17)	−0.0009 (14)	0.0018 (14)	−0.0103 (14)
C12	0.0258 (17)	0.0193 (16)	0.0216 (16)	−0.0055 (13)	0.0003 (13)	−0.0075 (13)
C13	0.0227 (16)	0.0205 (16)	0.0159 (15)	−0.0059 (13)	0.0009 (12)	−0.0049 (13)
C14	0.0161 (15)	0.0211 (15)	0.0161 (15)	−0.0010 (12)	0.0002 (12)	−0.0078 (13)
C15	0.0185 (15)	0.0184 (15)	0.0096 (13)	−0.0018 (12)	−0.0005 (11)	−0.0028 (12)
C16	0.0183 (15)	0.0200 (16)	0.0213 (16)	−0.0020 (12)	−0.0027 (12)	−0.0097 (13)
C17	0.0273 (18)	0.0232 (17)	0.0287 (18)	0.0008 (14)	0.0001 (14)	−0.0132 (15)
C18	0.0242 (16)	0.0149 (15)	0.0183 (15)	−0.0009 (12)	−0.0027 (13)	−0.0057 (12)
C19	0.0224 (16)	0.0203 (16)	0.0153 (15)	−0.0048 (12)	0.0004 (12)	−0.0060 (13)
C20	0.036 (2)	0.0286 (18)	0.0153 (16)	−0.0058 (15)	−0.0033 (14)	−0.0054 (14)
C21	0.044 (2)	0.033 (2)	0.0163 (17)	−0.0165 (17)	0.0027 (15)	−0.0052 (15)
C22	0.0334 (19)	0.035 (2)	0.0195 (17)	−0.0143 (16)	0.0082 (14)	−0.0134 (15)
C23	0.0250 (17)	0.0222 (16)	0.0181 (16)	−0.0039 (13)	−0.0003 (13)	−0.0095 (13)
C24	0.0272 (17)	0.0287 (18)	0.0207 (16)	−0.0105 (14)	0.0048 (14)	−0.0126 (14)
C25	0.037 (2)	0.036 (2)	0.0196 (17)	−0.0117 (16)	0.0106 (14)	−0.0177 (15)
C26	0.0248 (16)	0.0233 (16)	0.0167 (15)	−0.0053 (13)	0.0028 (12)	−0.0116 (13)
C27	0.0179 (16)	0.0224 (16)	0.0244 (16)	−0.0025 (13)	0.0035 (13)	−0.0155 (14)
C28	0.0189 (15)	0.0212 (16)	0.0179 (15)	0.0026 (12)	−0.0040 (12)	−0.0110 (13)
C29	0.0196 (16)	0.0223 (16)	0.0186 (15)	0.0004 (13)	0.0003 (12)	−0.0095 (13)
C30	0.0200 (15)	0.0181 (15)	0.0150 (14)	−0.0017 (12)	0.0050 (12)	−0.0060 (12)
C31	0.0211 (16)	0.0214 (16)	0.0193 (16)	0.0001 (13)	0.0015 (12)	−0.0072 (13)
C32	0.0238 (17)	0.0259 (17)	0.0237 (17)	−0.0005 (13)	−0.0011 (13)	−0.0139 (14)
C33	0.0279 (17)	0.0187 (16)	0.0265 (17)	−0.0018 (13)	0.0046 (14)	−0.0116 (14)
C34	0.0229 (16)	0.0182 (16)	0.0238 (17)	0.0028 (13)	0.0011 (13)	−0.0054 (13)
C35	0.0221 (16)	0.0233 (16)	0.0168 (15)	−0.0017 (13)	0.0016 (13)	−0.0073 (13)
C36	0.0208 (16)	0.0229 (17)	0.0197 (16)	−0.0012 (13)	−0.0019 (13)	−0.0097 (13)
C37	0.0280 (18)	0.0236 (17)	0.0233 (17)	−0.0008 (14)	−0.0059 (14)	−0.0126 (14)
C38	0.0238 (17)	0.0284 (17)	0.0238 (17)	−0.0042 (14)	−0.0102 (14)	−0.0128 (15)
C39	0.0273 (19)	0.0280 (19)	0.034 (2)	−0.0013 (15)	−0.0129 (15)	−0.0069 (16)
C40	0.036 (2)	0.045 (2)	0.035 (2)	−0.0161 (19)	−0.0136 (18)	0.0036 (19)
C41	0.027 (2)	0.075 (3)	0.027 (2)	−0.023 (2)	−0.0011 (16)	−0.015 (2)
C42	0.028 (2)	0.061 (3)	0.037 (2)	−0.0103 (18)	−0.0017 (16)	−0.031 (2)
C43	0.0280 (18)	0.0317 (19)	0.0279 (18)	−0.0047 (15)	−0.0034 (14)	−0.0150 (15)
C1'	0.0252 (17)	0.0344 (19)	0.0222 (16)	−0.0014 (14)	0.0004 (13)	−0.0165 (15)
Cl1'	0.0243 (4)	0.0616 (6)	0.0342 (5)	−0.0032 (4)	−0.0015 (4)	−0.0259 (5)
Cl2'	0.0409 (5)	0.0598 (6)	0.0259 (5)	0.0046 (5)	−0.0090 (4)	−0.0208 (5)
Cl3'	0.0607 (7)	0.0457 (6)	0.0387 (6)	−0.0254 (5)	0.0144 (5)	−0.0172 (5)

Geometric parameters (Å, º) top

O1—C6	1.346 (4)	C17—H17B	0.98
O1—C2	1.472 (4)	C17—H17C	0.98
O2—C6	1.222 (4)	C19—C23	1.529 (4)
O3—C15	1.233 (4)	C19—C20	1.536 (4)
O4—C18	1.221 (4)	C19—C26	1.556 (4)
O6—C36	1.203 (4)	C20—C21	1.536 (5)
O5—C27	1.231 (4)	C20—H20A	0.99
O7—C36	1.334 (4)	C20—H20B	0.99
O7—C37	1.454 (4)	C21—C22	1.527 (6)
N1—C6	1.357 (4)	C21—H21A	0.99
N1—C7	1.465 (4)	C21—H21B	0.99
N1—H1	0.88	C22—C25	1.527 (5)
N2—C15	1.336 (4)	C22—C24	1.531 (5)
N2—C16	1.442 (4)	C22—H22	1
N2—H2	0.88	C23—C24	1.542 (4)
N3—C18	1.346 (4)	C23—H23A	0.99
N3—C19	1.475 (4)	C23—H23B	0.99
N3—H3N	0.88	C24—H24A	0.99
N4—C27	1.347 (4)	C24—H24B	0.99
N4—C28	1.452 (4)	C25—C26	1.556 (4)
N4—H4	0.88	C25—H25A	0.99
C2—C5	1.514 (5)	C25—H25B	0.99
C2—C4	1.515 (5)	C26—C27	1.517 (5)
C2—C3	1.521 (5)	C26—H26	1
C3—H3A	0.98	C28—C29	1.526 (4)
C3—H3B	0.98	C28—C36	1.527 (4)
C3—H3C	0.98	C28—H28	1
C4—H4A	0.98	C29—C30	1.503 (4)
C4—H4B	0.98	C29—H29A	0.99
C4—H4C	0.98	C29—H29B	0.99
C5—H5A	0.98	C30—C35	1.391 (5)
C5—H5B	0.98	C30—C31	1.393 (5)
C5—H5C	0.98	C31—C32	1.391 (5)
C7—C10	1.530 (4)	C31—H31	0.95
C7—C8	1.539 (4)	C32—C33	1.385 (5)
C7—C14	1.552 (4)	C32—H32	0.95
C8—C9	1.553 (4)	C33—C34	1.380 (5)
C8—H8A	0.99	C33—H33	0.95
C8—H8B	0.99	C34—C35	1.383 (5)
C9—C12	1.525 (5)	C34—H34	0.95
C9—H9A	0.99	C35—H35	0.95
C9—H9B	0.99	C37—C38	1.494 (5)
C10—C11	1.540 (4)	C37—H37A	0.99
C10—H10A	0.99	C37—H37B	0.99
C10—H10B	0.99	C38—C43	1.385 (5)
C11—C12	1.542 (5)	C38—C39	1.387 (5)
C11—H11A	0.99	C39—C40	1.386 (6)
C11—H11B	0.99	C39—H39	0.95
C12—C13	1.529 (5)	C40—C41	1.378 (7)
C12—H12	1	C40—H40	0.95
C13—C14	1.548 (4)	C41—C42	1.386 (6)
C13—H13A	0.99	C41—H41	0.95
C13—H13B	0.99	C42—C43	1.385 (5)
C14—C15	1.518 (4)	C42—H42	0.95
C14—H14	1	C43—H43	0.95
C16—C17	1.526 (4)	C1'—Cl3'	1.751 (4)
C16—C18	1.545 (4)	C1'—Cl1'	1.751 (3)
C16—H16	1	C1'—Cl2'	1.762 (3)
C17—H17A	0.98	C1'—H1'	1

C6—O1—C2	121.4 (2)	C23—C19—C26	110.5 (3)
C36—O7—C37	117.1 (3)	C20—C19—C26	108.6 (3)
C6—N1—C7	124.1 (3)	C21—C20—C19	109.8 (3)
C6—N1—H1	118	C21—C20—H20A	109.7
C7—N1—H1	118	C19—C20—H20A	109.7
C15—N2—C16	120.6 (3)	C21—C20—H20B	109.7
C15—N2—H2	119.7	C19—C20—H20B	109.7
C16—N2—H2	119.7	H20A—C20—H20B	108.2
C18—N3—C19	124.5 (3)	C22—C21—C20	109.6 (3)
C18—N3—H3N	117.8	C22—C21—H21A	109.7
C19—N3—H3N	117.8	C20—C21—H21A	109.7
C27—N4—C28	117.8 (3)	C22—C21—H21B	109.7
C27—N4—H4	121.1	C20—C21—H21B	109.7
C28—N4—H4	121.1	H21A—C21—H21B	108.2
O1—C2—C5	102.2 (3)	C25—C22—C21	109.5 (3)
O1—C2—C4	108.5 (3)	C25—C22—C24	109.2 (3)
C5—C2—C4	111.6 (3)	C21—C22—C24	108.9 (3)
O1—C2—C3	111.8 (3)	C25—C22—H22	109.8
C5—C2—C3	110.5 (3)	C21—C22—H22	109.8
C4—C2—C3	111.7 (3)	C24—C22—H22	109.8
C2—C3—H3A	109.5	C19—C23—C24	109.9 (3)
C2—C3—H3B	109.5	C19—C23—H23A	109.7
H3A—C3—H3B	109.5	C24—C23—H23A	109.7
C2—C3—H3C	109.5	C19—C23—H23B	109.7
H3A—C3—H3C	109.5	C24—C23—H23B	109.7
H3B—C3—H3C	109.5	H23A—C23—H23B	108.2
C2—C4—H4A	109.5	C22—C24—C23	109.3 (3)
C2—C4—H4B	109.5	C22—C24—H24A	109.8
H4A—C4—H4B	109.5	C23—C24—H24A	109.8
C2—C4—H4C	109.5	C22—C24—H24B	109.8
H4A—C4—H4C	109.5	C23—C24—H24B	109.8
H4B—C4—H4C	109.5	H24A—C24—H24B	108.3
C2—C5—H5A	109.5	C22—C25—C26	110.4 (3)
C2—C5—H5B	109.5	C22—C25—H25A	109.6
H5A—C5—H5B	109.5	C26—C25—H25A	109.6
C2—C5—H5C	109.5	C22—C25—H25B	109.6
H5A—C5—H5C	109.5	C26—C25—H25B	109.6
H5B—C5—H5C	109.5	H25A—C25—H25B	108.1
O2—C6—O1	125.0 (3)	C27—C26—C25	112.1 (3)
O2—C6—N1	126.0 (3)	C27—C26—C19	109.6 (2)
O1—C6—N1	109.0 (3)	C25—C26—C19	108.2 (3)
N1—C7—C10	111.5 (2)	C27—C26—H26	109
N1—C7—C8	112.5 (2)	C25—C26—H26	109
C10—C7—C8	108.5 (3)	C19—C26—H26	109
N1—C7—C14	109.2 (2)	O5—C27—N4	120.5 (3)
C10—C7—C14	109.5 (2)	O5—C27—C26	121.8 (3)
C8—C7—C14	105.5 (2)	N4—C27—C26	117.7 (3)
C7—C8—C9	109.4 (3)	N4—C28—C29	112.5 (2)
C7—C8—H8A	109.8	N4—C28—C36	109.2 (2)
C9—C8—H8A	109.8	C29—C28—C36	109.9 (3)
C7—C8—H8B	109.8	N4—C28—H28	108.4
C9—C8—H8B	109.8	C29—C28—H28	108.4
H8A—C8—H8B	108.2	C36—C28—H28	108.4
C12—C9—C8	109.3 (3)	C30—C29—C28	113.4 (3)
C12—C9—H9A	109.8	C30—C29—H29A	108.9
C8—C9—H9A	109.8	C28—C29—H29A	108.9
C12—C9—H9B	109.8	C30—C29—H29B	108.9
C8—C9—H9B	109.8	C28—C29—H29B	108.9
H9A—C9—H9B	108.3	H29A—C29—H29B	107.7
C7—C10—C11	110.1 (3)	C35—C30—C31	118.5 (3)
C7—C10—H10A	109.6	C35—C30—C29	119.6 (3)
C11—C10—H10A	109.6	C31—C30—C29	121.9 (3)
C7—C10—H10B	109.6	C32—C31—C30	120.4 (3)
C11—C10—H10B	109.6	C32—C31—H31	119.8
H10A—C10—H10B	108.2	C30—C31—H31	119.8
C10—C11—C12	108.8 (3)	C33—C32—C31	120.4 (3)
C10—C11—H11A	109.9	C33—C32—H32	119.8
C12—C11—H11A	109.9	C31—C32—H32	119.8
C10—C11—H11B	109.9	C34—C33—C32	119.4 (3)
C12—C11—H11B	109.9	C34—C33—H33	120.3
H11A—C11—H11B	108.3	C32—C33—H33	120.3
C9—C12—C13	108.9 (3)	C33—C34—C35	120.5 (3)
C9—C12—C11	108.5 (3)	C33—C34—H34	119.7
C13—C12—C11	107.8 (3)	C35—C34—H34	119.7
C9—C12—H12	110.5	C34—C35—C30	120.8 (3)
C13—C12—H12	110.5	C34—C35—H35	119.6
C11—C12—H12	110.5	C30—C35—H35	119.6
C12—C13—C14	109.0 (3)	O6—C36—O7	125.0 (3)
C12—C13—H13A	109.9	O6—C36—C28	125.1 (3)
C14—C13—H13A	109.9	O7—C36—C28	109.9 (3)
C12—C13—H13B	109.9	O7—C37—C38	112.1 (3)
C14—C13—H13B	109.9	O7—C37—H37A	109.2
H13A—C13—H13B	108.3	C38—C37—H37A	109.2
C15—C14—C13	111.6 (3)	O7—C37—H37B	109.2
C15—C14—C7	114.1 (2)	C38—C37—H37B	109.2
C13—C14—C7	108.5 (2)	H37A—C37—H37B	107.9
C15—C14—H14	107.4	C43—C38—C39	119.4 (3)
C13—C14—H14	107.4	C43—C38—C37	120.7 (3)
C7—C14—H14	107.4	C39—C38—C37	119.9 (3)
O3—C15—N2	122.2 (3)	C40—C39—C38	120.1 (4)
O3—C15—C14	122.8 (3)	C40—C39—H39	119.9
N2—C15—C14	115.0 (3)	C38—C39—H39	119.9
N2—C16—C17	109.2 (3)	C41—C40—C39	120.0 (4)
N2—C16—C18	108.5 (2)	C41—C40—H40	120
C17—C16—C18	110.5 (3)	C39—C40—H40	120
N2—C16—H16	109.6	C40—C41—C42	120.3 (4)
C17—C16—H16	109.6	C40—C41—H41	119.8
C18—C16—H16	109.6	C42—C41—H41	119.8
C16—C17—H17A	109.5	C43—C42—C41	119.4 (4)
C16—C17—H17B	109.5	C43—C42—H42	120.3
H17A—C17—H17B	109.5	C41—C42—H42	120.3
C16—C17—H17C	109.5	C42—C43—C38	120.6 (4)
H17A—C17—H17C	109.5	C42—C43—H43	119.7
H17B—C17—H17C	109.5	C38—C43—H43	119.7
O4—C18—N3	124.9 (3)	Cl3'—C1'—Cl1'	110.4 (2)
O4—C18—C16	120.3 (3)	Cl3'—C1'—Cl2'	110.83 (19)
N3—C18—C16	114.8 (3)	Cl1'—C1'—Cl2'	110.70 (19)
N3—C19—C23	108.1 (2)	Cl3'—C1'—H1'	108.3
N3—C19—C20	111.5 (3)	Cl1'—C1'—H1'	108.3
C23—C19—C20	107.7 (3)	Cl2'—C1'—H1'	108.3
N3—C19—C26	110.3 (2)

C2—O1—C6—N1	171.0 (3)	N3—C19—C20—C21	−172.7 (3)
C6—N1—C7—C14	170.3 (3)	C23—C19—C20—C21	−54.2 (4)
N1—C7—C14—C15	40.5 (3)	C26—C19—C20—C21	65.5 (3)
C7—C14—C15—N2	−115.8 (3)	C19—C20—C21—C22	−9.3 (4)
C14—C15—N2—C16	169.9 (3)	C20—C21—C22—C25	−54.1 (4)
C15—N2—C16—C18	−56.0 (4)	C20—C21—C22—C24	65.1 (4)
N2—C16—C18—N3	155.4 (3)	N3—C19—C23—C24	−173.3 (3)
C16—C18—N3—C19	−173.2 (3)	C20—C19—C23—C24	66.0 (3)
C18—N3—C19—C26	72.4 (4)	C26—C19—C23—C24	−52.5 (3)
N3—C19—C26—C27	60.2 (3)	C25—C22—C24—C23	66.2 (4)
C19—C26—C27—N4	−92.4 (3)	C21—C22—C24—C23	−53.3 (4)
C26—C27—N4—C28	167.0 (3)	C19—C23—C24—C22	−10.8 (4)
C27—N4—C28—C36	−58.1 (4)	C21—C22—C25—C26	64.3 (4)
N4—C28—C36—O7	147.0 (3)	C24—C22—C25—C26	−54.8 (4)
C6—O1—C2—C5	175.6 (3)	C22—C25—C26—C27	113.0 (3)
C6—O1—C2—C4	−66.3 (4)	C22—C25—C26—C19	−7.9 (4)
C6—O1—C2—C3	57.3 (4)	C23—C19—C26—C27	−59.3 (3)
C2—O1—C6—O2	−9.0 (5)	C20—C19—C26—C27	−177.3 (3)
C7—N1—C6—O2	−13.3 (5)	N3—C19—C26—C25	−177.4 (3)
C7—N1—C6—O1	166.7 (3)	C23—C19—C26—C25	63.2 (3)
C6—N1—C7—C10	−68.6 (4)	C20—C19—C26—C25	−54.8 (3)
C6—N1—C7—C8	53.5 (4)	C28—N4—C27—O5	−10.1 (4)
N1—C7—C8—C9	168.0 (2)	C25—C26—C27—O5	−35.5 (4)
C10—C7—C8—C9	−68.2 (3)	C19—C26—C27—O5	84.6 (4)
C14—C7—C8—C9	49.1 (3)	C25—C26—C27—N4	147.5 (3)
C7—C8—C9—C12	17.7 (4)	C27—N4—C28—C29	179.6 (3)
N1—C7—C10—C11	171.1 (3)	N4—C28—C29—C30	−78.8 (3)
C8—C7—C10—C11	46.7 (3)	C36—C28—C29—C30	159.3 (3)
C14—C7—C10—C11	−68.0 (3)	C28—C29—C30—C35	−85.7 (4)
C7—C10—C11—C12	18.9 (4)	C28—C29—C30—C31	94.4 (3)
C8—C9—C12—C13	−68.8 (3)	C35—C30—C31—C32	−1.1 (5)
C8—C9—C12—C11	48.2 (3)	C29—C30—C31—C32	178.8 (3)
C10—C11—C12—C9	−69.9 (3)	C30—C31—C32—C33	−0.1 (5)
C10—C11—C12—C13	47.9 (4)	C31—C32—C33—C34	1.1 (5)
C9—C12—C13—C14	44.8 (3)	C32—C33—C34—C35	−0.9 (5)
C11—C12—C13—C14	−72.7 (3)	C33—C34—C35—C30	−0.3 (5)
C12—C13—C14—C15	150.0 (3)	C31—C30—C35—C34	1.3 (5)
C12—C13—C14—C7	23.4 (3)	C29—C30—C35—C34	−178.6 (3)
C10—C7—C14—C15	−81.8 (3)	C37—O7—C36—O6	−1.0 (5)
C8—C7—C14—C15	161.6 (3)	C37—O7—C36—C28	178.1 (3)
N1—C7—C14—C13	165.6 (2)	N4—C28—C36—O6	−33.9 (4)
C10—C7—C14—C13	43.3 (3)	C29—C28—C36—O6	90.0 (4)
C8—C7—C14—C13	−73.3 (3)	C29—C28—C36—O7	−89.1 (3)
C16—N2—C15—O3	−10.0 (4)	C36—O7—C37—C38	−87.1 (3)
C13—C14—C15—O3	−59.4 (4)	O7—C37—C38—C43	124.5 (3)
C7—C14—C15—O3	64.1 (4)	O7—C37—C38—C39	−57.7 (4)
C13—C14—C15—N2	120.7 (3)	C43—C38—C39—C40	1.1 (5)
C15—N2—C16—C17	−176.4 (3)	C37—C38—C39—C40	−176.7 (3)
C19—N3—C18—O4	8.4 (5)	C38—C39—C40—C41	0.3 (6)
N2—C16—C18—O4	−26.1 (4)	C39—C40—C41—C42	−1.3 (6)
C17—C16—C18—O4	93.5 (4)	C40—C41—C42—C43	0.8 (6)
C17—C16—C18—N3	−85.0 (3)	C41—C42—C43—C38	0.6 (5)
C18—N3—C19—C23	−166.8 (3)	C39—C38—C43—C42	−1.6 (5)
C18—N3—C19—C20	−48.5 (4)	C37—C38—C43—C42	176.2 (3)

Hydrogen-bond geometry (Å, º) top

D—H···A	D—H	H···A	D···A	D—H···A
N1—H1···O4	0.88	2.16	2.994 (4)	157
N2—H2···O5ⁱ	0.88	2.12	2.914 (3)	150
N3—H3N···O6	0.88	2.51	3.159 (3)	131
N4—H4···O3	0.88	2.20	3.009 (3)	153
C1′—H1′···O2	1.00	2.09	3.071 (4)	167

Symmetry code: (i) x+1, y, z.

Hydrogen-bond geometry (Å, º) top

D—H···A	D—H	H···A	D···A	D—H···A
N1—H1···O4	0.88	2.16	2.994 (4)	157
N2—H2···O5ⁱ	0.88	2.12	2.914 (3)	150
N3—H3N···O6	0.88	2.51	3.159 (3)	131
N4—H4···O3	0.88	2.20	3.009 (3)	153
C1'—H1'···O2	1.00	2.09	3.071 (4)	167

Symmetry code: (i) x+1, y, z.

Experimental details

Crystal data
Chemical formula	C₄₂H₅₆N₄O₇·CHCl₃
M_r	848.27
Crystal system, space group	Triclinic, P1
Temperature (K)	100
a, b, c (Å)	9.2194 (6), 10.8908 (6), 11.8698 (7)
α, β, γ (°)	63.489 (2), 86.467 (2), 89.069 (2)
V (Å³)	1064.38 (11)
Z	1
Radiation type	Mo Kα
µ (mm⁻¹)	0.27
Crystal size (mm)	0.4 × 0.1 × 0.1

Data collection
Diffractometer	D8 Venture Bruker diffractometer
Absorption correction	Multi-scan (SADABS; Bruker, 2014)
T_min, T_max	0.908, 0.963
No. of measured, independent and observed [I > 2σ(I)] reflections	42849, 8712, 8015
R_int	0.037
(sin θ/λ)_max (Å⁻¹)	0.626

Refinement
R[F² > 2σ(F²)], wR(F²), S	0.038, 0.087, 1.08
No. of reflections	8712
No. of parameters	518
No. of restraints	3
H-atom treatment	H-atom parameters constrained
Δρ_max, Δρ_min (e Å⁻³)	0.30, −0.32
Absolute structure	Flack x determined using 3702 quotients [(I⁺)-(I^-)]/[(I⁺)+(I^-)] (Parsons et al., 2013)
Absolute structure parameter	0.006 (18)

Computer programs: APEX2 (Bruker, 2014), SAINT (Bruker, 2014), SIR2008 (Burla et al., 2007), SHELXL2014 (Sheldrick, 2015), Mercury (Macrae et al., 2008) and pyMOL (DeLano, 2002), WinGX (Farrugia, 2012) and enCIFer (Allen et al., 2004).

Acknowledgements

The Plateforme de mesures de diffraction X of the Université de Lorraine is thanked for providing access to crystallographic facilities.

References

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Volume 71| Part 10| October 2015| Pages 1193-1195

doi:10.1107/S2056989015016941

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research communications\(\def\hfill{\hskip 5em}\def\hfil{\hskip 3em}\def\eqno#1{\hfil {#1}}\)

Crystal structure of Boc-(S)-ABOC-(S)-Ala-(S)-ABOC-(S)-Phe-OBn chloro­form monosolvate

1. Chemical context

2. Structural commentary

3. Supra­molecular features

4. Comparison with related structures

5. Synthesis and crystallization

6. Refinement

Supporting information

Acknowledgements

References

research communications

Crystal structure of Boc-(S)-ABOC-(S)-Ala-(S)-ABOC-(S)-Phe-OBn chloroform monosolvate

3. Supramolecular features