Synthesis and crystal structure of [(Sp)-(2-phenyl­ferrocen­yl)meth­yl]tri­methyl­ammonium iodide di­chloro­methane monosolvate

Lachguar, A.; Deydier, E.; Labande, A.; Manoury, E.; Poli, R.; Daran, J.-C.

doi:10.1107/S2056989022006053

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ISSN: 2056-9890

Volume 78| Part 7| July 2022| Pages 722-726

https://doi.org/10.1107/S2056989022006053

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Synthesis and crystal structure of [(S_p)-(2-phenylferrocenyl)methyl]trimethylammonium iodide dichloromethane monosolvate

Abdelhak Lachguar,^a,^b Eric Deydier,^a,^b Agnès Labande,^a Eric Manoury,^a Rinaldo Poli ^a and Jean-Claude Daran ^a ^*

^aCNRS, LCC (Laboratoire de Chimie de Coordination), Université de Toulouse, UPS, INPT, 205 Route de Narbonne, F-31077 Toulouse Cedex 4, France, and ^bIUT A Paul Sabatier, de Chimie, Avenue Georges Pompidou, CS 20258, F-81104, Castres Cedex, France
^*Correspondence e-mail: jean-claude.daran@lcc-toulouse.fr

Edited by G. Diaz de Delgado, Universidad de Los Andes, Venezuela (Received 24 January 2022; accepted 7 June 2022; online 14 June 2022)

As a follow-up to our research on the chemistry of disubstituted ferrocene derivatives, the synthesis and the structure of the title compound, [Fe(C₅H₅)(C₁₅H₁₉N)]I·CH₂Cl₂, is described. The cation molecule is built up from a ferrocene disubstituted by a trimethylammonium methyl group and a phenyl ring. The asymmetric unit contains the iodide to equilibrate the charge and a disordered dichloromethane solvate. The disordered model results from a roughly statistical exchange (0.6/0.4) between one Cl and one H. The packing of the structure is stabilized by weak C—H⋯X (X = I, Cl), C—H⋯π(Cp) and C—Cl⋯π(phenyl) interactions, building a three-dimensional network. The cation has planar chirality with S_p(Fc) absolute configuration. The structure of the title compound is compared with related disubstituted (trimethylammonio)methyl ferrocenes.

Keywords: 1,2-disubstitued ferrocene; planar chirality; chiral ligands; asymetric catalysis; disordered dichloromethane; crystal structure.

CCDC reference: 2177602

1. Chemical context

Asymmetric catalysis by transition metals has received considerable attention over the last few decades and numerous chiral ligands and complexes allowing high activity and enantioselectivity have been reported (Jacobsen et al., 1999 ; Börner, 2008 ). For this purpose, catalysts need a chiral ligand presenting at least a chiral center, a chiral axis or a planar chirality. Amongst the various chiral ligands that have been synthesized, ferrocenyl phosphines have proven to be particularly efficient for numerous asymmetric reactions (Buergler et al., 2012 ; Gómez Arrayás et al., 2006 ; Toma et al., 2014 )

Over the last few years, our team has developed the synthesis of various chiral ferrocenyl ligands for asymmetric catalysis (Audin et al., 2010 ; Labande et al., 2007 ; Bayda et al., 2014 ; Daran et al., 2010 ; Wei et al., 2012 , 2014 ; Loxq et al., 2014 ). We mainly focused on a series of chiral bidentate PX ferrocenyl ligands (X = OR, SR, NHC) bearing planar chirality, which have been successfully used in different homogeneous asymmetric catalytic reactions: allylic substitution, methoxycarbonylation, hydrogenation (Kozinets et al., 2012 ; Le Roux et al., 2007 ; Diab et al., 2008 ; Routaboul et al., 2005 ). All of these ligands present a planar chiral 1,2-disubstituted ferrocenyl group with coordination sites on both substituents. More recently, we wanted to extend the application of planar chiral 1,2-disubstituted ferrocenyl groups to the synthesis of ligands with only one substituent bearing a coordination site for fine tuning of existing ligands. To this aim, we needed an enantiomerically pure planar chiral building block bearing a good leaving group in order to introduce a planar chiral substituent on nucleophilic atoms. In this context, we report here the two-step synthesis of the title [(S_p)-(2-phenylferrocenyl)methyl]trimethylammonium iodide salt.

The latter is synthesized in two steps, the first consists in the enantioselective synthesis of (S_p)-A following the procedure developed by S.-L. You and co-workers (Gao et al., 2013 ), the second step is a quaternization of the tertiary amine to the ammonium salt by reaction with an excess of iodo methane. (Ferrocenylmethyl) ammoniums have been used successfully as electrophiles because of the stabilization of carbocations in an α position of ferrocene derivatives and because of the presence of a good leaving group: trimethylamine. Nucleophilic[EM2] substitution (Lin et al., 2020 ) on the methylene carbon atom in the α position of the ferrocene moiety in compound B, [(Sp)-(2-phenylferrocenyl)methyl]trimethylammonium iodide, should then be favoured and should provide an efficient access to a wide range of various enantiomerically pure ferrocene derivatives of type C including ligands, by reaction with various nucleophiles (amines, thiols, alcohols) (Fig. 1).

Figure 1
Synthesis of the title (S_p)-1-dimethylaminomethyl-2-phenylferrocenium iodide salt

2. Structural commentary

The molecular structure is based on a ferrocene moiety in which one of the Cp rings is disubstituted in the 1,2 position by a tri-methylammonium-methyl and a phenyl substituent. The molecule has a positive charge, which is counterbalanced by an iodide (Fig. 2). Moreover, there is one disordered dichloromethane solvate molecule per asymmetric unit. The disordered model results from the exchange between one Cl and one H in the ratio 0.6/0.4 (Fig. 3). This disorder might be induced by the occurence of weak C—Cl⋯I intramolecular and C—H⋯Cl intermolecular interactions. There are weak intramolecular C—H⋯I interactions within the asymmetric unit.

Figure 2
View of the asymmetric unit of the title compound with the atom-labelling scheme. Ellipsoids are drawn at the 30% probability level and the H atoms are represented as small circles of arbitrary radii. C—H⋯X (X = I, Cl) interactions are represented as dashed lines.

Figure 3
ORTEP view of the disordered CH₂Cl₂ solvent molecule. Ellipsoids are drawn at the 20% probability level. H atoms are represented as small circles of arbitrary radii.

As a result of the presence of the two substituents on the Cp ring, the cation molecule has planar chirality and its absolute structure is S_p, which is confirmed by the refinement of the Flack parameter (Parsons et al., 2013 ). The phenyl ring is twisted with respect to the Cp ring by 48.74 (17)° and the C1–C11–N1 unit is roughly perpendicular to the Cp ring to which it is attached, making a dihedral angle of 89.7 (2)°.

3. Supramolecular features

The crystal packing is governed by the occurrence of weak C—H⋯X (X = Cl, I), C—H⋯π and C—Cl⋯π interactions (Table 1). The iodine atom is engaged in many weak C—H⋯I interactions involving some of the H atoms of the methyl groups, one H atom of the methylene group and the non-disordered H atoms of the dichloromethane solvate. These interactions build up a ribbon developing parallel to the b axis (Fig. 4). Then the Cl2 atom of the chloroform solvate interacts with the C12—H12C methyl group, thus building a link between the strips, resulting in a layer parallel to the ( $[\overline{1}]$ 01) plane (Fig. 4). Moreover, there are two weak C—H⋯π interactions involving atom H13B of the C13 methyl group with the centroid of the Cp ring (C6–C10; Ct2) and atom C23 of the phenyl group with the centroid of the substituted Cp ring (C1–C5; Ct1). Finally, there is also a C—Cl⋯π interaction involving the Cl1 atom of the solvate [C30—Cl1⋯Ct3 (C21–C26), 1.757 (8), 3.4096 (2) and 4.7694 (3) Å, 132.13 (1)°]. All these interactions build up a three-dimensional network.

Table 1
Hydrogen-bond geometry (Å, °)

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
C11—H11A⋯I1ⁱ	0.99	3.17	3.988 (4)	140
C12—H12C⋯I1	0.98	3.21	4.117 (5)	154
C12—H12B⋯Cl2C	0.98	3.51	3.787 (7)	99
C13—H13A⋯I1	0.98	3.27	4.158 (5)	151
C14—H14A⋯I1	0.98	3.14	4.057 (5)	157
C14—H14B⋯I1ⁱ	0.98	3.25	4.077 (5)	143
C30A—H30A⋯I1ⁱⁱ	1.00	2.89	3.867 (7)	166
C13—H13B⋯CT2ⁱⁱⁱ	0.98	2.98	3.901 (6)	158
C23—H23⋯CT1^iv	0.95	2.69	3.600 (7)	160
Symmetry codes: (i) $[-x+1, y+{\script{1\over 2}}, -z+2]$ ; (ii) $[-x, y+{\script{1\over 2}}, -z+1]$ ; (iii) $[-x+2, y-{\script{1\over 2}}, -z+2]$ ; (iv) $[-x+1, y+{\script{1\over 2}}, -z+1]$ .

Figure 4
Partial packing view showing the C—H⋯X (X = I, Cl) intermolecular interactions resulting in the formation of ribbons parallel to the b axis and C—H⋯Cl interactions linking the ribbons to form a layer parallel to ( $[\overline{1}]$ 01) plane. The dichloromethane solvate builds the link between the layers.

4. Database survey

A search in the Cambridge Structural Database (version 5.36; Groom et al., 2016 ) using a fragment containing a ferrocenyl disubsituted by a trimethylamoniummethyl and at least a C atom gave six hits that could be compared with the title compound. A comparison of C1—C11, C11—N1 distances and dihedral angles between the Cp ring and the C1–C11–N1 plane is shown in Table 2. In all these compounds, the bulky N(CH₃)₃ group is always above the Cp ring to which it is attached. The dihedral angles between the Cp and the C–C–N plane range from 69.8 to 89.7° for the title compound.

Table 2
Comparison of the geometry (Å, °) within the methylamine C–CH₂–N fragment for the title compound with related structures.

	C1—C11	C11—N1	Cp1/C1>N1
Title compound	1.493 (5)	1.531 (4)	89.7 (2)
BECKUQ	1.509	1.534	85.6
LIFWUS	1.465	1.544	69.8
LIFWUS	1.509	1.536	78.6
LIFXAZ	1.494	1.525	70.4
PIJLEB	1.494	1.519	86.9
VIKZIA	1.485	1.538	86.0
XEQKIN	1.497	1.531	84.2
References: BECKUQ (Hitchcock et al., 2002 ); LIFWUS (Malezieux et al., 1994 ); LIFXAZ (Malezieux et al., 1994); PIJLEB (Butler et al., 2002 ); VIKZIA (Butler et al., 2002); XEKQIN (Deck et al., 2000 ).

5. Synthesis and crystallization

Synthesis of (S_p)-1-dimethylaminomethyl-2-phenylferrocene [(S_p)-A]: To a solution of phenylboronic acid (110 mg, 1 mmol) in DMA (8 mL) were added Boc–L–Val–OH (43.5 mg, 0.2 mmol), Pd(OAc)₂ (22.5 mg, 0.1 mmol), K₂CO₃ (138.21 mg, 1 mmol), TBAB (tetrabutyl ammonium bromide; 80 mg, 0.25 mmol) and N,N-dimethylferrocenylmethylamine (243 mg, 1 mmol) successively. The mixture was stirred at 333 K under air (open flask). When the reaction was complete (TLC monitoring), the mixture was quenched with saturated aqueous NaHCO₃ and the organic phase was extracted three times with EtOAc. The combined organic layers were washed with H₂O and brine successively, dried (Na₂SO₄) and filtered. The solvent was removed under reduced pressure and the residue purified by column chromatography (ethyl acetate/petroleum ether = 1/10, v/v, 2% Et₃N) to afford the desired product A as a yellow oil (205 mg, 64% yield). The results are in agreement with published analytical data (Gao et al., 2013).

¹H NMR (400 MHz, CDCl₃) δ ppm 7.79–7.71 (m, 2H, CH Ph), 7.41–7.31 (m, 2H, CH Ph), 7.30–7.21 (m, 1H, CH Ph), 4.53–4.47 (m, 1H, CH subst Cp), 4.33 (dd, J = 2.5, 1.5 Hz, 1H, CH subst Cp), 4.26 (t, J = 2.5 Hz, 1H, CH subst Cp), 4.08 (s, 5H, CH C_p), 3.67 (d, J = 12.8 Hz, 1H, CH₂), 3.18 (d, J = 12.8 Hz, 1H, CH₂), 2.21 (s, 6H, CH₃). ¹³C NMR (101 MHz, CDCl₃) δ ppm 138.91 (C_q, Ph), 129.36 (CH Ph), 127.93 (CH Ph), 126.06 (CH Ph), 88.17 (C_q subst Cp), 82.24 (C_q subst Cp), 71.56 (CH subst Cp), 70.06 (CH Cp), 69.94 (CH subst Cp), 67.10 (CH subst Cp), 57.93 (CH₂), 45.08 (CH₃).

Synthesis of [(Sp)-(2-phenylferrocenyl)methyl]trimethylammonium iodide salt [(S_p)-B]: An excess of MeI (1 mL, 1.62 mmol) was added to a solution of A (250 mg, 0.78 mmol) in Et₂O (3 mL). The reaction mixture was stirred for 4 h at RT. An abundant yellow solid precipitated. The yellow solid was filtered, washed with Et₂O and dried to yield B as a yellow solid (332 mg, 92% yield), which was crystallized in dichloromethane.

¹H NMR (400 MHz, CDCl₃) δ ppm 7.58–7.50 (m, 2H, CH Ph), 7.46–7.37 (m, 2H, CH Ph), 7.37–7.26 (m, 1H, CH Ph), 5.33 (d, J = 13.4 Hz, 1H, CH₂), 4.91 (dd, J = 2.5, 1.5 Hz, 1H, CH subst Cp), 4.83 (d, J = 13.4 Hz, 1H, CH₂), 4.56 (dd, J = 2.5, 1.5 Hz,1H, CH subst Cp), 4.52 (t, J = 2.5 Hz, 1H, CH subst Cp), 4.34 (s, 5H, CH C_p), 3.02 (s, 9H, CH₃). ¹³C NMR (101 MHz, CDCl₃) δ ppm 136.54 (C_q, Ph), 129.86 (CH Ph), 129.05 (CH Ph), 127.72 (CH Ph), 90.61 (C_q subst Cp), 73.44 (CH subst Cp), 72.15 (C_q subst Cp), 70.96 (CH Cp), 70.44 (C_q subst Cp), 70.04 (C_q subst Cp), 65.21 (CH₂), 52.76 (CH₃).

6. Refinement

Crystal data, data collection and structure refinement details are summarized in Table 3. All H atoms attached to C atoms were fixed geometrically and treated as riding with C—H = 1.0 Å (methine), 0.95 Å (aromatic), 0.99 Å (methylene) and 0.98 Å (methyl) with U_iso(H) = 1.2U_eq(CH aromatic, methylene) or U_iso(H) = 1.5U_eq(CH₃).

Table 3
Experimental details

Crystal data
Chemical formula	[Fe(C₅H₅)(C₁₅H₁₉N)]I·CH₂Cl₂
M_r	546.08
Crystal system, space group	Monoclinic, P2₁
Temperature (K)	110
a, b, c (Å)	10.7919 (7), 10.2128 (5), 11.2941 (7)
β (°)	113.031 (3)
V (Å³)	1145.57 (12)
Z	2
Radiation type	Mo Kα
μ (mm⁻¹)	2.24
Crystal size (mm)	0.30 × 0.10 × 0.10

Data collection
Diffractometer	Bruker APEXII CCD
Absorption correction	Multi-scan (SADABS; Krause et al., 2015 )
T_min, T_max	0.520, 0.746
No. of measured, independent and observed [I > 2σ(I)] reflections	58547, 6993, 6822
R_int	0.052
(sin θ/λ)_max (Å⁻¹)	0.715

Refinement
R[F² > 2σ(F²)], wR(F²), S	0.033, 0.092, 1.06
No. of reflections	6993
No. of parameters	247
No. of restraints	1
H-atom treatment	H-atom parameters constrained
Δρ_max, Δρ_min (e Å⁻³)	1.50, −0.69
Absolute structure	Flack x determined using 3144 quotients [(I⁺)−(I⁻)]/[(I⁺)+(I⁻)] (Parsons et al., 2013)
Absolute structure parameter	0.018 (6)
Computer programs: APEX2 and SAINT (Bruker, 2015 ), SHELXT (Sheldrick, 2015a ), SHELXL2018 (Sheldrick, 2015b ), ORTEPIII (Burnett & Johnson, 1996 ), ORTEP-3 for Windows (Farrugia, 2012 ) and Mercury (Macrae et al., 2020 ).

The occurrence of three large residual densities around the C atom of the solvate with distances around 1.76 Å initially suggested the presence of a chloroform solvate molecule. However, if one of the Cl atoms (Cl1) could be refined correctly with full occupancy, the two others display large and elongated ellipsoids. Refining their occupancy factors using the restraints available in SHELXL gave a ratio of 0.6/0.4. So the disordered model is based on an exchange between one H and one Cl (Fig. 3). The model has been refined using the PART instruction to model two CH₂Cl₂ models. The non-disordered atoms C30, H30 and Cl1 were split with occupancy factor 0.5 and introduced in the two models (C30A, C30B, H30A, H30B, Cl1A, Cl1B). Their coordinates and thermal parameters were constrained to be identical using the EXYZ and EADP commands available in SHELXL. This disordered model is not perfect, as suggested by a large residual electron density in the vicinity of the atom H30B.

Supporting information

CCDC reference: 2177602

Crystal structure: contains datablocks I, global. DOI: https://doi.org/10.1107/S2056989022006053/dj2043sup1.cif

Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S2056989022006053/dj2043Isup2.hkl

checkCIF report

Computing details top

Data collection: APEX2 (Bruker, 2015); cell refinement: SAINT (Bruker, 2015); data reduction: SAINT (Bruker, 2015); program(s) used to solve structure: SHELXT (Sheldrick, 2015a); program(s) used to refine structure: SHELXL2018 (Sheldrick, 2015b); molecular graphics: ORTEPIII (Burnett & Johnson, 1996), ORTEP-3 for Windows (Farrugia, 2012) and Mercury (Macrae et al., 2020); software used to prepare material for publication: SHELXL2018 (Sheldrick, 2015b).

[(S_p)-(2-Phenylferrocenyl)methyl]trimethylammonium iodide dichloromethane monosolvate top

Crystal data top

[Fe(C₅H₅)(C₁₅H₁₉N)]I·CH₂Cl₂	F(000) = 544
M_r = 546.08	D_x = 1.583 Mg m⁻³
Monoclinic, P2₁	Mo Kα radiation, λ = 0.71073 Å
a = 10.7919 (7) Å	Cell parameters from 9989 reflections
b = 10.2128 (5) Å	θ = 2.8–28.3°
c = 11.2941 (7) Å	µ = 2.24 mm⁻¹
β = 113.031 (3)°	T = 110 K
V = 1145.57 (12) Å³	Stick, yellow
Z = 2	0.30 × 0.10 × 0.10 mm

Data collection top

Bruker APEXII CCD diffractometer	6993 independent reflections
Radiation source: micro-focus sealed tube	6822 reflections with I > 2σ(I)
Graphite monochromator	R_int = 0.052
φ and ω scans	θ_max = 30.5°, θ_min = 2.1°
Absorption correction: multi-scan (SADABS; Krause et al., 2015)	h = −15→15
T_min = 0.520, T_max = 0.746	k = −14→14
58547 measured reflections	l = −16→16

Refinement top

Refinement on F²	Secondary atom site location: difference Fourier map
Least-squares matrix: full	Hydrogen site location: inferred from neighbouring sites
R[F² > 2σ(F²)] = 0.033	H-atom parameters constrained
wR(F²) = 0.092	w = 1/[σ²(F_o²) + (0.0507P)² + 0.9038P] where P = (F_o² + 2F_c²)/3
S = 1.06	(Δ/σ)_max = 0.001
6993 reflections	Δρ_max = 1.50 e Å⁻³
247 parameters	Δρ_min = −0.68 e Å⁻³
1 restraint	Absolute structure: Flack x determined using 3144 quotients [(I⁺)-(I^-)]/[(I⁺)+(I^-)] (Parsons et al., 2013)
Primary atom site location: structure-invariant direct methods	Absolute structure parameter: 0.018 (6)

Special details top

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

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

	x	y	z	U_iso*/U_eq	Occ. (<1)
Fe1	0.94060 (5)	0.53142 (6)	0.79508 (5)	0.02716 (11)
I1	0.22433 (3)	0.13532 (3)	0.79999 (3)	0.04532 (10)
N1	0.5997 (3)	0.3408 (3)	0.8610 (3)	0.0281 (6)
C1	0.7697 (3)	0.4388 (3)	0.7817 (3)	0.0243 (6)
C2	0.7375 (3)	0.5512 (4)	0.6967 (3)	0.0248 (6)
C3	0.8016 (4)	0.5304 (5)	0.6083 (4)	0.0323 (7)
H3	0.797426	0.587679	0.540618	0.039*
C4	0.8728 (4)	0.4085 (5)	0.6395 (4)	0.0361 (8)
H4	0.924513	0.371724	0.596435	0.043*
C5	0.8532 (4)	0.3521 (4)	0.7450 (4)	0.0316 (7)
H5	0.888964	0.270870	0.784766	0.038*
C6	1.0323 (5)	0.6035 (7)	0.9762 (5)	0.0588 (18)
H6	0.996901	0.602449	1.041048	0.071*
C7	1.1125 (5)	0.5035 (6)	0.9540 (6)	0.0546 (14)
H7	1.139685	0.424007	1.000841	0.065*
C8	1.1439 (4)	0.5440 (6)	0.8501 (6)	0.0482 (11)
H8	1.196503	0.496477	0.814202	0.058*
C9	1.0835 (5)	0.6679 (6)	0.8081 (6)	0.0517 (13)
H9	1.088663	0.717959	0.739283	0.062*
C10	1.0143 (5)	0.7038 (6)	0.8864 (7)	0.0542 (14)
H10	0.964387	0.782051	0.879465	0.065*
C11	0.7314 (3)	0.4163 (4)	0.8937 (3)	0.0262 (6)
H11A	0.723121	0.502191	0.930581	0.031*
H11B	0.804794	0.367396	0.960681	0.031*
C12	0.4841 (4)	0.4146 (5)	0.7671 (6)	0.0463 (11)
H12A	0.496041	0.423269	0.685738	0.069*
H12B	0.479920	0.501808	0.801502	0.069*
H12C	0.400292	0.367326	0.752068	0.069*
C13	0.6057 (5)	0.2094 (4)	0.8064 (5)	0.0389 (9)
H13A	0.518810	0.165131	0.783295	0.058*
H13B	0.676498	0.156995	0.870448	0.058*
H13C	0.625814	0.219443	0.729424	0.058*
C14	0.5803 (6)	0.3216 (6)	0.9844 (5)	0.0501 (13)
H14A	0.494379	0.277179	0.966431	0.075*
H14B	0.579953	0.406942	1.023851	0.075*
H14C	0.654042	0.268085	1.043360	0.075*
C21	0.6496 (4)	0.6618 (3)	0.6930 (3)	0.0279 (7)
C22	0.5483 (5)	0.6960 (5)	0.5744 (4)	0.0425 (10)
H22	0.539718	0.649794	0.498588	0.051*
C23	0.4595 (6)	0.7987 (7)	0.5682 (6)	0.0594 (16)
H23	0.390870	0.820909	0.487518	0.071*
C24	0.4694 (5)	0.8671 (5)	0.6747 (6)	0.0469 (11)
H24	0.408025	0.935960	0.668760	0.056*
C25	0.5712 (5)	0.8348 (5)	0.7930 (5)	0.0372 (8)
H25	0.579600	0.882142	0.868150	0.045*
C26	0.6603 (4)	0.7334 (4)	0.8012 (4)	0.0308 (7)
H26	0.729624	0.712896	0.882019	0.037*
C30A	0.1255 (9)	0.5103 (11)	0.4280 (8)	0.086 (3)	0.5
H30C	0.160640	0.586709	0.485441	0.103*	0.5
H30A	0.029108	0.526078	0.374882	0.103*	0.5
Cl1A	0.2146 (3)	0.4929 (2)	0.3278 (2)	0.0790 (6)	0.5
Cl2B	0.1425 (3)	0.3690 (3)	0.5204 (3)	0.0674 (8)	0.6
C30B	0.1255 (9)	0.5103 (11)	0.4280 (8)	0.086 (3)	0.5
H30D	0.032076	0.537089	0.374507	0.103*	0.5
H30B	0.121215	0.423883	0.465898	0.103*	0.5
Cl1B	0.2146 (3)	0.4929 (2)	0.3278 (2)	0.0790 (6)	0.5
Cl2C	0.1919 (5)	0.6201 (4)	0.5491 (4)	0.0680 (11)	0.4

Atomic displacement parameters (Å²) top

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
Fe1	0.0183 (2)	0.0300 (2)	0.0302 (2)	−0.00341 (18)	0.00622 (17)	−0.0044 (2)
I1	0.03471 (13)	0.05047 (17)	0.04750 (16)	−0.00545 (12)	0.01253 (11)	0.00816 (14)
N1	0.0238 (13)	0.0291 (14)	0.0308 (15)	−0.0013 (11)	0.0099 (11)	−0.0001 (11)
C1	0.0183 (13)	0.0244 (15)	0.0269 (14)	−0.0016 (11)	0.0052 (11)	−0.0012 (12)
C2	0.0205 (13)	0.0268 (15)	0.0230 (13)	−0.0016 (12)	0.0041 (10)	−0.0013 (11)
C3	0.0294 (16)	0.0410 (19)	0.0267 (15)	−0.0056 (16)	0.0113 (13)	−0.0044 (15)
C4	0.0301 (17)	0.041 (2)	0.040 (2)	−0.0051 (15)	0.0170 (16)	−0.0133 (17)
C5	0.0237 (15)	0.0258 (16)	0.043 (2)	−0.0018 (12)	0.0102 (14)	−0.0055 (14)
C6	0.035 (2)	0.095 (5)	0.040 (2)	−0.026 (3)	0.0078 (18)	−0.027 (3)
C7	0.030 (2)	0.060 (3)	0.051 (3)	−0.014 (2)	−0.0078 (19)	0.011 (2)
C8	0.0196 (16)	0.059 (3)	0.062 (3)	−0.0088 (19)	0.0115 (17)	−0.013 (3)
C9	0.036 (2)	0.053 (3)	0.058 (3)	−0.020 (2)	0.010 (2)	0.003 (2)
C10	0.030 (2)	0.048 (3)	0.072 (4)	−0.0106 (19)	0.007 (2)	−0.024 (3)
C11	0.0221 (14)	0.0273 (15)	0.0253 (14)	−0.0034 (12)	0.0050 (12)	−0.0001 (12)
C12	0.0215 (16)	0.045 (2)	0.065 (3)	0.0037 (16)	0.0092 (18)	0.016 (2)
C13	0.036 (2)	0.0298 (19)	0.050 (2)	−0.0059 (15)	0.0161 (18)	−0.0073 (17)
C14	0.054 (3)	0.062 (3)	0.042 (2)	−0.023 (2)	0.027 (2)	−0.010 (2)
C21	0.0245 (14)	0.0288 (18)	0.0265 (14)	0.0016 (12)	0.0058 (12)	0.0030 (12)
C22	0.041 (2)	0.045 (2)	0.0309 (19)	0.0142 (19)	0.0026 (17)	0.0023 (17)
C23	0.050 (3)	0.064 (3)	0.046 (3)	0.030 (3)	−0.001 (2)	0.007 (2)
C24	0.044 (2)	0.041 (2)	0.057 (3)	0.018 (2)	0.021 (2)	0.010 (2)
C25	0.041 (2)	0.0325 (17)	0.044 (2)	0.0020 (16)	0.0226 (18)	−0.0021 (15)
C26	0.0319 (17)	0.0299 (17)	0.0298 (16)	0.0016 (14)	0.0112 (14)	0.0025 (13)
C30A	0.071 (5)	0.121 (8)	0.060 (4)	0.051 (5)	0.021 (3)	0.005 (4)
Cl1A	0.1058 (16)	0.0728 (11)	0.0816 (12)	0.0165 (10)	0.0615 (12)	0.0079 (9)
Cl2B	0.0526 (12)	0.107 (2)	0.0579 (13)	0.0290 (14)	0.0379 (11)	0.0377 (14)
C30B	0.071 (5)	0.121 (8)	0.060 (4)	0.051 (5)	0.021 (3)	0.005 (4)
Cl1B	0.1058 (16)	0.0728 (11)	0.0816 (12)	0.0165 (10)	0.0615 (12)	0.0079 (9)
Cl2C	0.105 (3)	0.0471 (19)	0.0525 (17)	0.005 (2)	0.0320 (19)	−0.0071 (15)

Geometric parameters (Å, º) top

Fe1—C1	2.025 (3)	C9—H9	0.9500
Fe1—C6	2.030 (5)	C10—H10	0.9500
Fe1—C7	2.034 (5)	C11—H11A	0.9900
Fe1—C8	2.037 (4)	C11—H11B	0.9900
Fe1—C5	2.037 (4)	C12—H12A	0.9800
Fe1—C10	2.038 (5)	C12—H12B	0.9800
Fe1—C9	2.041 (5)	C12—H12C	0.9800
Fe1—C2	2.043 (3)	C13—H13A	0.9800
Fe1—C4	2.048 (4)	C13—H13B	0.9800
Fe1—C3	2.055 (4)	C13—H13C	0.9800
N1—C12	1.488 (6)	C14—H14A	0.9800
N1—C13	1.489 (5)	C14—H14B	0.9800
N1—C14	1.500 (6)	C14—H14C	0.9800
N1—C11	1.529 (5)	C21—C26	1.390 (5)
C1—C5	1.435 (5)	C21—C22	1.402 (5)
C1—C2	1.449 (5)	C22—C23	1.404 (7)
C1—C11	1.495 (5)	C22—H22	0.9500
C2—C3	1.435 (5)	C23—C24	1.359 (9)
C2—C21	1.465 (5)	C23—H23	0.9500
C3—C4	1.433 (7)	C24—C25	1.398 (8)
C3—H3	0.9500	C24—H24	0.9500
C4—C5	1.412 (6)	C25—C26	1.391 (6)
C4—H4	0.9500	C25—H25	0.9500
C5—H5	0.9500	C26—H26	0.9500
C6—C10	1.400 (10)	C30A—Cl2B	1.748 (11)
C6—C7	1.422 (10)	C30A—Cl1A	1.758 (8)
C6—H6	0.9500	C30A—H30C	0.9900
C7—C8	1.406 (9)	C30A—H30A	0.9900
C7—H7	0.9500	C30B—Cl2C	1.695 (11)
C8—C9	1.418 (9)	C30B—Cl1B	1.758 (8)
C8—H8	0.9500	C30B—H30D	0.9900
C9—C10	1.411 (9)	C30B—H30B	0.9900

C1—Fe1—C6	108.39 (19)	C7—C6—Fe1	69.7 (3)
C1—Fe1—C7	119.30 (19)	C10—C6—H6	125.7
C6—Fe1—C7	41.0 (3)	C7—C6—H6	125.7
C1—Fe1—C8	153.2 (2)	Fe1—C6—H6	126.0
C6—Fe1—C8	68.1 (2)	C8—C7—C6	107.3 (5)
C7—Fe1—C8	40.4 (2)	C8—C7—Fe1	69.9 (3)
C1—Fe1—C5	41.37 (15)	C6—C7—Fe1	69.3 (3)
C6—Fe1—C5	126.6 (2)	C8—C7—H7	126.4
C7—Fe1—C5	106.4 (2)	C6—C7—H7	126.4
C8—Fe1—C5	117.9 (2)	Fe1—C7—H7	126.0
C1—Fe1—C10	127.2 (2)	C7—C8—C9	108.2 (5)
C6—Fe1—C10	40.3 (3)	C7—C8—Fe1	69.7 (3)
C7—Fe1—C10	68.5 (3)	C9—C8—Fe1	69.8 (3)
C8—Fe1—C10	68.3 (2)	C7—C8—H8	125.9
C5—Fe1—C10	164.6 (2)	C9—C8—H8	125.9
C1—Fe1—C9	164.8 (2)	Fe1—C8—H8	126.2
C6—Fe1—C9	67.8 (3)	C10—C9—C8	108.0 (5)
C7—Fe1—C9	68.3 (2)	C10—C9—Fe1	69.7 (3)
C8—Fe1—C9	40.7 (2)	C8—C9—Fe1	69.5 (3)
C5—Fe1—C9	152.8 (2)	C10—C9—H9	126.0
C10—Fe1—C9	40.5 (3)	C8—C9—H9	126.0
C1—Fe1—C2	41.75 (14)	Fe1—C9—H9	126.4
C6—Fe1—C2	120.6 (2)	C6—C10—C9	107.8 (5)
C7—Fe1—C2	155.2 (2)	C6—C10—Fe1	69.6 (3)
C8—Fe1—C2	163.3 (2)	C9—C10—Fe1	69.9 (3)
C5—Fe1—C2	69.89 (15)	C6—C10—H10	126.1
C10—Fe1—C2	108.24 (19)	C9—C10—H10	126.1
C9—Fe1—C2	126.2 (2)	Fe1—C10—H10	126.1
C1—Fe1—C4	68.89 (16)	C1—C11—N1	114.3 (3)
C6—Fe1—C4	163.1 (3)	C1—C11—H11A	108.7
C7—Fe1—C4	124.6 (2)	N1—C11—H11A	108.7
C8—Fe1—C4	106.3 (2)	C1—C11—H11B	108.7
C5—Fe1—C4	40.44 (18)	N1—C11—H11B	108.7
C10—Fe1—C4	154.4 (3)	H11A—C11—H11B	107.6
C9—Fe1—C4	119.1 (2)	N1—C12—H12A	109.5
C2—Fe1—C4	69.31 (16)	N1—C12—H12B	109.5
C1—Fe1—C3	69.09 (15)	H12A—C12—H12B	109.5
C6—Fe1—C3	155.3 (2)	N1—C12—H12C	109.5
C7—Fe1—C3	162.3 (2)	H12A—C12—H12C	109.5
C8—Fe1—C3	125.5 (2)	H12B—C12—H12C	109.5
C5—Fe1—C3	68.75 (18)	N1—C13—H13A	109.5
C10—Fe1—C3	120.5 (2)	N1—C13—H13B	109.5
C9—Fe1—C3	107.8 (2)	H13A—C13—H13B	109.5
C2—Fe1—C3	40.99 (14)	N1—C13—H13C	109.5
C4—Fe1—C3	40.88 (19)	H13A—C13—H13C	109.5
C12—N1—C13	108.7 (4)	H13B—C13—H13C	109.5
C12—N1—C14	110.2 (4)	N1—C14—H14A	109.5
C13—N1—C14	108.1 (4)	N1—C14—H14B	109.5
C12—N1—C11	110.9 (3)	H14A—C14—H14B	109.5
C13—N1—C11	111.6 (3)	N1—C14—H14C	109.5
C14—N1—C11	107.2 (3)	H14A—C14—H14C	109.5
C5—C1—C2	108.2 (3)	H14B—C14—H14C	109.5
C5—C1—C11	124.2 (3)	C26—C21—C22	118.3 (4)
C2—C1—C11	127.5 (3)	C26—C21—C2	123.4 (3)
C5—C1—Fe1	69.8 (2)	C22—C21—C2	118.3 (4)
C2—C1—Fe1	69.78 (19)	C21—C22—C23	119.8 (4)
C11—C1—Fe1	123.7 (2)	C21—C22—H22	120.1
C3—C2—C1	106.7 (3)	C23—C22—H22	120.1
C3—C2—C21	125.2 (3)	C24—C23—C22	121.6 (5)
C1—C2—C21	127.9 (3)	C24—C23—H23	119.2
C3—C2—Fe1	70.0 (2)	C22—C23—H23	119.2
C1—C2—Fe1	68.47 (19)	C23—C24—C25	119.0 (4)
C21—C2—Fe1	129.6 (3)	C23—C24—H24	120.5
C4—C3—C2	108.4 (4)	C25—C24—H24	120.5
C4—C3—Fe1	69.3 (2)	C26—C25—C24	120.3 (4)
C2—C3—Fe1	69.0 (2)	C26—C25—H25	119.9
C4—C3—H3	125.8	C24—C25—H25	119.9
C2—C3—H3	125.8	C21—C26—C25	121.1 (4)
Fe1—C3—H3	127.5	C21—C26—H26	119.5
C5—C4—C3	108.6 (3)	C25—C26—H26	119.5
C5—C4—Fe1	69.4 (2)	Cl2B—C30A—Cl1A	110.2 (5)
C3—C4—Fe1	69.8 (2)	Cl2B—C30A—H30C	109.6
C5—C4—H4	125.7	Cl1A—C30A—H30C	109.6
C3—C4—H4	125.7	Cl2B—C30A—H30A	109.6
Fe1—C4—H4	126.7	Cl1A—C30A—H30A	109.6
C4—C5—C1	108.1 (4)	H30C—C30A—H30A	108.1
C4—C5—Fe1	70.2 (2)	Cl2C—C30B—Cl1B	114.9 (7)
C1—C5—Fe1	68.9 (2)	Cl2C—C30B—H30D	113.2
C4—C5—H5	126.0	Cl1B—C30B—H30D	109.6
C1—C5—H5	126.0	Cl2C—C30B—H30B	108.5
Fe1—C5—H5	126.5	Cl1B—C30B—H30B	108.5
C10—C6—C7	108.7 (5)	H30D—C30B—H30B	101.0
C10—C6—Fe1	70.2 (3)

N1—C11—C1—C2	92.4 (4)	N1—C11—C1—C5	−91.2 (4)

Hydrogen-bond geometry (Å, º) top

D—H···A	D—H	H···A	D···A	D—H···A
C11—H11A···I1ⁱ	0.99	3.17	3.988 (4)	140
C12—H12C···I1	0.98	3.21	4.117 (5)	154
C12—H12B···Cl2C	0.98	3.51	3.787 (7)	99
C13—H13A···I1	0.98	3.27	4.158 (5)	151
C14—H14A···I1	0.98	3.14	4.057 (5)	157
C14—H14B···I1ⁱ	0.98	3.25	4.077 (5)	143
C30A—H30A···I1ⁱⁱ	1.00	2.89	3.867 (7)	166
C13—H13B···CT2ⁱⁱⁱ	0.98	2.98	3.901 (6)	158
C23—H23···CT1^iv	0.95	2.69	3.600 (7)	160

Symmetry codes: (i) −x+1, y+1/2, −z+2; (ii) −x, y+1/2, −z+1; (iii) −x+2, y−1/2, −z+2; (iv) −x+1, y+1/2, −z+1.

Comparison of the geometry (Å, °) within the methylamine C–CH₂–N fragment for the title compound with related structures. top

	C1—C11	C11—N1	Cp1/C1>N1
Title compound	1.493 (5)	1.531 (4)	89.7 (2)
BECKUQ	1.509	1.534	85.6
LIFWUS	1.465	1.544	69.8
LIFWUS	1.509	1.536	78.6
LIFXAZ	1.494	1.525	70.4
PIJLEB	1.494	1.519	86.9
VIKZIA	1.485	1.538	86.0
XEQKIN	1.497	1.531	84.2

References: BECKUQ (Hitchcock et al., 2002); LIFWUS (Malezieux et al., 1994); LIFXAZ (Malezieux et al., 1994); PIJLEB (Butler et al., 2002); VIKZIA (Butler et al., 2002); XEKQIN (Deck et al., 2000).

Acknowledgements

The authors thank the Centre National de la Recherche Scientifique (CNRS), the Institut Universitaire de Technologie (IUT) Paul Sabatier and the Chemistry Department of the IUT Castres for offering access to laboratories and analytical equipment.

Funding information

Funding for this research was provided by: Centre National de la Recherche Scientifique (CNRS), Midi-Pyrénnées region, Institut Universitaire de Technologie (IUT) Paul Sabatier and the Syndicat Mixte de Castres Mazamet (PhD grant ALDOCT000431.

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