Crystal structure of 8-[7,8-bis­(4-chloro­benzo­yl)-7H-cyclo­penta­[a]ace­naphthylen-9-yl]naphthalene-1-carb­oxy­lic acid

Jacob, J.P.; Sithambaresan, M.; Kunjachan, C.; Kurup, M.R.P.

doi:10.1107/S2056989014026334

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ISSN: 2056-9890

Volume 71| Part 1| January 2015| Pages 38-41

https://doi.org/10.1107/S2056989014026334

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Crystal structure of 8-[7,8-bis(4-chlorobenzoyl)-7H-cyclopenta[a]acenaphthylen-9-yl]naphthalene-1-carboxylic acid

Jomon P. Jacob,^a M. Sithambaresan,^b ^* Christy Kunjachan ^a and M. R. Prathapachandra Kurup ^a

^aDepartment of Applied Chemistry, Cochin University of Science and Technology, Kochi 682 022, India, and ^bDepartment of Chemistry, Faculty of Science, Eastern University, Chenkalady, Sri Lanka
^*Correspondence e-mail: msithambaresan@gmail.com

Edited by W. T. A. Harrison, University of Aberdeen, Scotland (Received 22 November 2014; accepted 1 December 2014; online 1 January 2015)

The title compound, C₄₀H₂₂Cl₂O₄, was formed by a Michael–Aldol domino reaction sequence, which coupled acenaphthenequinone with 4-chloroacetophenone in the presence of KOH in methanol. The dihedral angles between the central cyclopenta[a]acenaphthylene fused-ring system (r.m.s. deviation = 0.066 Å) and the 4-chlorobenzoyl rings are 62.25 (10) and 70.19 (10)°. The dihedral angle between the central ring system and the naphthoic acid grouping is 62.46 (7)°. This twisting of the pendant rings facilitates the formation of an intramolecular aromatic π–π stacking interaction between the 4-chlorobenzoyl and naphthoic acid rings, with centroid–centroid distances of 3.4533 (16) and 3.5311 (16) Å, and a C—H⋯π interaction between one of the H atoms of the central moiety and the 4-chlorobenzoyl ring with an H⋯π distance of 2.57 Å. In the crystal, carboxylic acid inversion dimers generate R₂²(8) loops. The dimers are linked by weak C—H⋯O and C—H⋯Cl hydrogen bonds and C—H⋯π interactions, generating a three-dimensional architecture.

Keywords: crystal structure; domino reaction; acenaphthenequinone; 4-chloroacetophenone; hydrogen bonding.

CCDC reference: 1024474

1. Chemical context

Domino reactions (Sousa et al., 2014 ; Kumar & Perumal 2014 ; Pokhodylo et al., 2014 ; Feng et al. 2014 ; Ramachandran et al., 2014 ; Basetti et al., 2014 ), also called cascade or tandem reactions, are usually carried out to enable the efficient construction of complex molecules from simple substrates with high atom economy. In this reaction, multiple C—C or C—H bonds are formed in the same vessel, including different reaction mechanisms to form complex molecules without the purification of intermediates. These reactions are often used in medical or combinatorial chemistry to synthesize complex active drug molecules (Sudhapriya et al., 2014 ; Tietze et al., 2014 ; Fu et al., 2013 ; Shestopalov et al., 2013 ; Zohreh & Alizadeh, 2013 ; Renault et al., 2007 ). Domino reactions are classified as homo-domino processes and hetero-domino processes (Nesi et al., 1999 ).

One of the attractive strategies for constructing complex molecules (Filippini et al., 1995 ; List et al., 2000 ; Wang et al., 2007 ) is a domino sequence of Michael addition and aldol condensation. In this article, we report the formation of the title compound (4) through a domino reaction sequence involving Claisen–Schmidt condensation and benzil–benzilic acid rearrangement between acenaphthenequinone (1) and 4-chloroacetophenone (2) in the presence of methanolic KOH (Fig. 1).

Figure 1
Reaction scheme showing the synthesis of the title compound (4).

2. Structural commentary

In the title compound, the 4-chlorobenzoyl units are approximately coplanar with slight twisting [dihedral angle, 18.49 (13)°] and nearly parallel to the plane of naphthoic acid moiety with dihedral angles of 8.82 (11) and 12.06 (11)°. The C=O oxygen atoms of the two 4-chlorobenzoyl moieties point toward each other. The central cyclopenta[a]acenaphthylene ring system makes dihedral angles of 62.25 (10) and 70.19 (10)° with the 4-chlorobenzoyl units and 62.46 (7)° with the naphthoic acid grouping. This twisting minimizes steric interactions among the substituents (Fig. 2) and facilitates the formation of intramolecular π–π interactions between the 4-chlorobenzoyl and naphthoic acid rings with centroid centroid distances of 3.4533 (16) and 3.5311 (16) Å and a C—H⋯π interaction between one of the hydrogen atoms of the central moiety and the 4-chlorobenzoyl ring.

Figure 2
ORTEP view of the title compound, with atom labelling. Displacement ellipsoids are drawn at the 50% probability level.

3. Supramolecular features

There are four intermolecular hydrogen-bonding interactions present in the crystal. The carbonyl oxygen atoms (O2 and O3) accept three hydrogen bonds; one with the hydrogen atom from a carboxylic acid group of a neighboring molecule with D⋯A distance of 2.649 (3) Å (−x, 1 − y, 2 − z) and the other two with the hydrogen atoms attached to atoms C32 and C26 of the naphthoic acid and cyclopenta[a]acenaphthylene rings, respectively, of adjacent molecules with D⋯A distances of 3.301 (4) (1 + x, y, z) and 3.416 (4) Å (1 − x, 1 − y, 2 − z) (Fig. 3). The fourth interaction is between the H atom attached to the naphthoic acid ring and a chlorine atom of the 4-chlorobenzoyl moiety with a D⋯A distance of 3.619 (3) Å (1 − x, −y, 3 − z). Furthermore, there are two C—H⋯π interactions found between hydrogen atoms (H2 and H12) and the five- and six-membered rings of the cyclopenta[a]acenaphthylene and 4-cholorobenzoyl moieties of neighbouring molecules (Fig. 4), with H⋯π distances of 2.87 and 2.84 Å (Table 1).

Table 1
Hydrogen-bond geometry (Å, °)

Cg1 is the centroid of the C18–C20/C28/C29 ring, Cg2 is the centroid of the C24–C29 ring and Cg3 is the centroid of the C11–C16 ring.

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O4—H4′⋯O3ⁱ	0.84 (1)	1.81 (1)	2.649 (3)	178 (4)
C26—H26⋯O3ⁱⁱ	0.93	2.52	3.416 (4)	163
C32—H32⋯O2ⁱⁱⁱ	0.93	2.47	3.301 (4)	149
C35—H35⋯Cl2^iv	0.93	2.74	3.619 (3)	157
C2—H2⋯Cg1^v	0.93	2.87	3.577 (3)	134
C12—H12⋯Cg2^vi	0.93	2.84	3.725 (3)	160
C21—H21⋯Cg3	0.93	2.57	3.425 (3)	152
Symmetry codes: (i) -x, -y+1, -z+2; (ii) -x+1, -y+1, -z+2; (iii) x+1, y, z; (iv) -x+1, -y, -z+3; (v) -x+1, -y, -z+2; (vi) x-1, y, z.

Figure 3
Hydrogen-bonding interactions (dashed lines) in the title compound.

Figure 4
C—H⋯π and π–π interactions found in the title compound.

The packing appears to be controlled by classical and non-classical hydrogen bonds and three C—H⋯π interactions (Mathew et al., 2013 ). Fig. 5 shows the packing of the title compound viewed along the a axis.

Figure 5
A packing diagram of the title compound viewed along the a axis.

4. Synthesis and crystallization

A mixture of acenaphthenequinone (1) (4.6 g, 25 mmol), 4-chloroacetophenone (2) (4.2 g, 27 mmol) and powdered potassium hydroxide (1.0 g) in methanol (30 ml) was stirred around 333 K for 4 h and later kept in a refrigerator for 48 h. The reaction mixture was concentrated and the residue was chromatographed over silica gel. Product (3) was obtained (Vadakkan et al., 2003 ) by elution with a mixture (9:1) of hexane and ethyl acetate. Elution with a mixture of (1:1) methanol and ethyl acetate yielded the product (4) (Fig. 1). Red blocks of compound (4) were recrystallized from a solvent mixture of ethyl acetate and dichloromethane.

Yield 0.8 g (5%); m.p. >523 K; IR (KBr, ν_max): 3370 (OH), 1732 (C=O) cm⁻¹; ¹H NMR (CDCl₃): δ 8.00–5.30 (m, 20H, aromatic); ¹³C NMR (CDCl₃): δ 207.57, 190.82, 179.39, 138.71, 135.57, 134.23, 134.17, 133.77, 132.57, 131.94, 131.69, 131.31, 130.40, 130.29, 129.90, 129.58, 129.22, 128.90, 128.85, 128.42, 128.06, 127.74, 127.66, 127.23, 126.54, 125.76, 125.64, 124.94, 124.38, 119.77, 103.38, 70.96; MS: m/z 636 (M⁺); Analysis calculated for C₄₀H₂₂Cl₂O₄: C: 75.36, H: 3.48; found: C: 75.26, H: 3.30.

5. Refinement

Crystal data, data collection and structure refinement details are summarized in Table 2. All H atoms on C were placed in calculated positions, guided by difference maps, with C—H bond distances of 0.93 Å. H atoms were assigned as U_iso(H) = 1.2U_eq(C). Hydrogen atom H4′ of the naphthoic acid group was located from a difference Fourier map and refined with a distance restraint of O—H = 0.84 (1) Å. The low-angle reflections (001), ( $[\overline{1}]$ 01) and (0 $[\overline{1}]$ 1) were omitted from the refinement owing to bad agreement.

Table 2
Experimental details

Crystal data
Chemical formula	C₄₀H₂₂Cl₂O₄
M_r	637.47
Crystal system, space group	Triclinic, P $[\overline{1}]$
Temperature (K)	296
a, b, c (Å)	9.1617 (6), 12.5518 (8), 13.9305 (8)
α, β, γ (°)	84.669 (3), 88.468 (3), 72.364 (3)
V (Å³)	1520.05 (17)
Z	2
Radiation type	Mo Kα
μ (mm⁻¹)	0.26
Crystal size (mm)	0.35 × 0.30 × 0.25

Data collection
Diffractometer	Bruker Kappa APEXII CCD
Absorption correction	Multi-scan (SADABS; Bruker, 2004 )
T_min, T_max	0.891, 0.908
No. of measured, independent and observed [I > 2σ(I)] reflections	19996, 5287, 4251
R_int	0.033
(sin θ/λ)_max (Å⁻¹)	0.595

Refinement
R[F² > 2σ(F²)], wR(F²), S	0.052, 0.152, 1.12
No. of reflections	5287
No. of parameters	419
No. of restraints	1
H-atom treatment	H atoms treated by a mixture of independent and constrained refinement
Δρ_max, Δρ_min (e Å⁻³)	0.51, −0.78
Computer programs:APEX2, SAINT and XPREP (Bruker, 2004), SHELXS97, SHELXL97 and SHELXL2014 (Sheldrick, 2008 ), ORTEP-3 for Windows (Farrugia, 2012 ), DIAMOND (Brandenburg, 2010 ), and publCIF (Westrip, 2010 ).

Supporting information

CCDC reference: 1024474

Crystal structure: contains datablock I. DOI: https://doi.org/10.1107/S2056989014026334/hb7324sup1.cif

Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S2056989014026334/hb7324Isup2.hkl

checkCIF report

Computing details top

Data collection: APEX2 (Bruker, 2004); cell refinement: APEX2 and SAINT (Bruker, 2004); data reduction: SAINT and XPREP (Bruker, 2004); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL2014 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012) and DIAMOND (Brandenburg, 2010); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008) and publCIF (Westrip, 2010).

8-[7,8-Bis(4-chlorobenzoyl)-7H-cyclopenta[a]acenaphthylen-9-yl]naphthalene-1-carboxylic acid top

Crystal data top

C₄₀H₂₂Cl₂O₄	Z = 2
M_r = 637.47	F(000) = 656
Triclinic, P1	D_x = 1.393 Mg m⁻³
a = 9.1617 (6) Å	Mo Kα radiation, λ = 0.71073 Å
b = 12.5518 (8) Å	Cell parameters from 9963 reflections
c = 13.9305 (8) Å	θ = 2.4–28.1°
α = 84.669 (3)°	µ = 0.26 mm⁻¹
β = 88.468 (3)°	T = 296 K
γ = 72.364 (3)°	Block, red
V = 1520.05 (17) Å³	0.35 × 0.30 × 0.25 mm

Data collection top

Bruker axs kappa apex2 CCD Diffractometer	4251 reflections with I > 2σ(I)
ω and φ scan	R_int = 0.033
Absorption correction: multi-scan (SADABS; Bruker, 2004)	θ_max = 25.0°, θ_min = 2.2°
T_min = 0.891, T_max = 0.908	h = −10→10
19996 measured reflections	k = −14→14
5287 independent reflections	l = −16→16

Refinement top

Refinement on F²	1 restraint
Least-squares matrix: full	Hydrogen site location: mixed
R[F² > 2σ(F²)] = 0.055	H atoms treated by a mixture of independent and constrained refinement
wR(F²) = 0.154	w = 1/[σ²(F_o²) + (0.0529P)² + 1.3725P] where P = (F_o² + 2F_c²)/3
S = 1.16	(Δ/σ)_max < 0.001
5287 reflections	Δρ_max = 0.51 e Å⁻³
419 parameters	Δρ_min = −0.78 e Å⁻³

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
C1	0.3710 (3)	−0.0055 (2)	1.14118 (19)	0.0423 (6)
H1	0.4150	−0.0104	1.0802	0.051*
C2	0.4574 (3)	−0.0622 (2)	1.2201 (2)	0.0494 (7)
H2	0.5584	−0.1061	1.2129	0.059*
C3	0.3904 (4)	−0.0521 (3)	1.3095 (2)	0.0534 (7)
C4	0.2397 (4)	0.0087 (2)	1.32183 (19)	0.0497 (7)
H4	0.1965	0.0132	1.3831	0.060*
C5	0.1536 (3)	0.0630 (2)	1.24211 (18)	0.0410 (6)
H5	0.0508	0.1027	1.2492	0.049*
C6	0.2204 (3)	0.0584 (2)	1.15107 (17)	0.0346 (5)
C7	0.1283 (3)	0.1184 (2)	1.06661 (18)	0.0389 (6)
C8	0.1805 (3)	0.1835 (2)	0.99406 (16)	0.0354 (5)
C9	0.1165 (3)	0.2180 (2)	0.89523 (16)	0.0355 (5)
H9	0.1824	0.1478	0.8726	0.043*
C10	−0.0153 (3)	0.1981 (2)	0.85791 (18)	0.0429 (6)
C11	−0.0373 (3)	0.2001 (2)	0.75185 (18)	0.0395 (6)
C12	−0.1801 (3)	0.2556 (2)	0.7114 (2)	0.0491 (7)
H12	−0.2595	0.2938	0.7501	0.059*
C13	−0.2052 (3)	0.2546 (3)	0.6143 (2)	0.0525 (7)
H13	−0.2998	0.2939	0.5867	0.063*
C14	−0.0878 (3)	0.1946 (2)	0.55900 (19)	0.0476 (7)
C15	0.0539 (3)	0.1368 (3)	0.5976 (2)	0.0494 (7)
H15	0.1315	0.0958	0.5592	0.059*
C16	0.0788 (3)	0.1407 (2)	0.6946 (2)	0.0458 (6)
H16	0.1745	0.1031	0.7215	0.055*
C17	0.3071 (3)	0.2282 (2)	1.00154 (16)	0.0356 (5)
C18	0.3212 (3)	0.2850 (2)	0.91319 (17)	0.0370 (6)
C19	0.2079 (3)	0.2776 (2)	0.84755 (16)	0.0369 (6)
C20	0.2216 (3)	0.3468 (2)	0.75736 (17)	0.0395 (6)
C21	0.1484 (4)	0.3781 (2)	0.66922 (19)	0.0513 (7)
H21	0.0674	0.3521	0.6547	0.062*
C22	0.1988 (4)	0.4506 (3)	0.6011 (2)	0.0585 (8)
H22	0.1514	0.4695	0.5411	0.070*
C23	0.3133 (4)	0.4933 (3)	0.6199 (2)	0.0620 (9)
H23	0.3423	0.5405	0.5729	0.074*
C24	0.3892 (4)	0.4669 (2)	0.7103 (2)	0.0500 (7)
C25	0.5021 (4)	0.5104 (3)	0.7430 (3)	0.0631 (9)
H25	0.5372	0.5603	0.7022	0.076*
C26	0.5604 (4)	0.4798 (3)	0.8343 (3)	0.0616 (8)
H26	0.6338	0.5104	0.8544	0.074*
C27	0.5130 (3)	0.4036 (2)	0.8989 (2)	0.0491 (7)
H27	0.5551	0.3837	0.9604	0.059*
C28	0.4040 (3)	0.3594 (2)	0.86951 (17)	0.0390 (6)
C29	0.3416 (3)	0.3925 (2)	0.77553 (18)	0.0410 (6)
C30	0.4027 (3)	0.2227 (2)	1.08743 (17)	0.0359 (5)
C31	0.5582 (3)	0.1748 (3)	1.0823 (2)	0.0483 (7)
H31	0.6034	0.1592	1.0226	0.058*
C32	0.6509 (3)	0.1488 (3)	1.1650 (2)	0.0596 (8)
H32	0.7566	0.1189	1.1595	0.072*
C33	0.5861 (3)	0.1672 (3)	1.2529 (2)	0.0560 (8)
H33	0.6466	0.1433	1.3080	0.067*
C34	0.4282 (3)	0.2221 (2)	1.26200 (18)	0.0424 (6)
C35	0.3591 (4)	0.2439 (3)	1.35317 (19)	0.0553 (8)
H35	0.4190	0.2199	1.4085	0.066*
C36	0.2086 (4)	0.2987 (3)	1.3618 (2)	0.0601 (9)
H36	0.1642	0.3073	1.4225	0.072*
C37	0.1190 (4)	0.3425 (2)	1.2789 (2)	0.0529 (7)
H37	0.0163	0.3830	1.2850	0.063*
C38	0.1818 (3)	0.3261 (2)	1.18879 (17)	0.0376 (6)
C39	0.3359 (3)	0.2582 (2)	1.17763 (16)	0.0337 (5)
C40	0.0952 (3)	0.3994 (2)	1.10642 (19)	0.0402 (6)
O1	−0.1211 (2)	0.1783 (2)	0.90948 (15)	0.0642 (6)
O2	−0.0068 (2)	0.1055 (2)	1.06624 (14)	0.0571 (6)
O3	0.1576 (2)	0.45386 (16)	1.05156 (14)	0.0489 (5)
O4	−0.0494 (2)	0.40610 (19)	1.10215 (16)	0.0585 (6)
Cl1	−0.12238 (12)	0.18916 (9)	0.43778 (6)	0.0775 (3)
Cl2	0.50109 (14)	−0.11781 (11)	1.40953 (8)	0.1010 (4)
H4'	−0.082 (5)	0.451 (3)	1.053 (2)	0.100 (15)*

Atomic displacement parameters (Å²) top

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
C1	0.0453 (15)	0.0426 (14)	0.0383 (14)	−0.0109 (12)	0.0040 (11)	−0.0090 (11)
C2	0.0440 (16)	0.0444 (15)	0.0557 (17)	−0.0074 (13)	−0.0055 (13)	−0.0022 (13)
C3	0.062 (2)	0.0541 (17)	0.0449 (16)	−0.0218 (15)	−0.0142 (14)	0.0106 (13)
C4	0.0630 (19)	0.0581 (17)	0.0326 (14)	−0.0273 (15)	0.0041 (13)	0.0017 (12)
C5	0.0403 (14)	0.0481 (15)	0.0349 (13)	−0.0148 (12)	0.0042 (11)	−0.0010 (11)
C6	0.0394 (14)	0.0367 (13)	0.0318 (12)	−0.0176 (11)	0.0012 (10)	−0.0030 (10)
C7	0.0382 (14)	0.0475 (15)	0.0328 (13)	−0.0149 (12)	0.0010 (10)	−0.0056 (11)
C8	0.0358 (13)	0.0457 (14)	0.0264 (11)	−0.0139 (11)	−0.0019 (10)	−0.0060 (10)
C9	0.0369 (13)	0.0408 (13)	0.0289 (12)	−0.0116 (11)	−0.0029 (10)	−0.0040 (10)
C10	0.0442 (15)	0.0511 (15)	0.0349 (13)	−0.0162 (13)	−0.0055 (11)	−0.0041 (11)
C11	0.0399 (14)	0.0447 (14)	0.0375 (13)	−0.0169 (12)	−0.0076 (11)	−0.0053 (11)
C12	0.0461 (16)	0.0570 (17)	0.0407 (15)	−0.0079 (13)	−0.0055 (12)	−0.0112 (13)
C13	0.0477 (17)	0.0632 (18)	0.0433 (15)	−0.0114 (14)	−0.0118 (13)	−0.0026 (13)
C14	0.0561 (18)	0.0574 (17)	0.0345 (14)	−0.0233 (14)	−0.0061 (12)	−0.0076 (12)
C15	0.0497 (17)	0.0569 (17)	0.0436 (15)	−0.0156 (14)	0.0018 (13)	−0.0169 (13)
C16	0.0395 (15)	0.0504 (16)	0.0471 (15)	−0.0114 (13)	−0.0096 (12)	−0.0063 (12)
C17	0.0381 (14)	0.0432 (13)	0.0262 (11)	−0.0121 (11)	−0.0011 (10)	−0.0062 (10)
C18	0.0424 (14)	0.0433 (14)	0.0274 (12)	−0.0146 (11)	0.0014 (10)	−0.0081 (10)
C19	0.0452 (15)	0.0424 (14)	0.0249 (11)	−0.0146 (12)	−0.0007 (10)	−0.0065 (10)
C20	0.0532 (16)	0.0360 (13)	0.0300 (12)	−0.0139 (12)	0.0002 (11)	−0.0056 (10)
C21	0.071 (2)	0.0480 (16)	0.0335 (14)	−0.0162 (15)	−0.0075 (13)	−0.0021 (12)
C22	0.087 (2)	0.0489 (17)	0.0355 (15)	−0.0166 (17)	−0.0058 (15)	0.0035 (12)
C23	0.093 (3)	0.0475 (17)	0.0427 (16)	−0.0210 (17)	0.0091 (16)	0.0076 (13)
C24	0.069 (2)	0.0363 (14)	0.0459 (16)	−0.0185 (14)	0.0091 (14)	−0.0044 (12)
C25	0.080 (2)	0.0496 (17)	0.068 (2)	−0.0344 (17)	0.0146 (18)	−0.0007 (15)
C26	0.069 (2)	0.0560 (18)	0.073 (2)	−0.0374 (17)	0.0065 (17)	−0.0108 (16)
C27	0.0566 (18)	0.0527 (16)	0.0451 (15)	−0.0253 (14)	0.0013 (13)	−0.0109 (13)
C28	0.0458 (15)	0.0416 (14)	0.0324 (13)	−0.0164 (12)	0.0048 (11)	−0.0083 (10)
C29	0.0531 (16)	0.0366 (13)	0.0353 (13)	−0.0157 (12)	0.0069 (11)	−0.0074 (10)
C30	0.0350 (13)	0.0437 (14)	0.0303 (12)	−0.0138 (11)	−0.0048 (10)	−0.0015 (10)
C31	0.0374 (15)	0.0632 (18)	0.0455 (15)	−0.0170 (13)	0.0016 (12)	−0.0058 (13)
C32	0.0335 (15)	0.079 (2)	0.065 (2)	−0.0185 (15)	−0.0123 (14)	0.0072 (17)
C33	0.0492 (18)	0.069 (2)	0.0524 (18)	−0.0242 (15)	−0.0258 (14)	0.0110 (15)
C34	0.0545 (17)	0.0419 (14)	0.0343 (13)	−0.0204 (13)	−0.0119 (12)	0.0024 (11)
C35	0.085 (2)	0.0581 (18)	0.0294 (14)	−0.0312 (18)	−0.0151 (14)	0.0025 (12)
C36	0.093 (3)	0.0601 (19)	0.0286 (14)	−0.0247 (19)	0.0057 (15)	−0.0093 (13)
C37	0.067 (2)	0.0442 (15)	0.0418 (15)	−0.0078 (14)	0.0091 (14)	−0.0083 (12)
C38	0.0475 (15)	0.0338 (13)	0.0317 (12)	−0.0121 (11)	−0.0002 (11)	−0.0038 (10)
C39	0.0401 (14)	0.0356 (12)	0.0281 (12)	−0.0157 (11)	−0.0053 (10)	−0.0005 (9)
C40	0.0396 (15)	0.0392 (14)	0.0385 (14)	−0.0064 (11)	−0.0022 (11)	−0.0046 (11)
O1	0.0481 (12)	0.1076 (19)	0.0438 (11)	−0.0367 (13)	−0.0076 (9)	0.0055 (11)
O2	0.0446 (12)	0.0895 (16)	0.0437 (11)	−0.0339 (11)	−0.0035 (9)	0.0091 (10)
O3	0.0452 (11)	0.0517 (11)	0.0462 (11)	−0.0126 (9)	−0.0090 (9)	0.0099 (9)
O4	0.0407 (12)	0.0666 (14)	0.0605 (14)	−0.0107 (10)	−0.0047 (10)	0.0153 (11)
Cl1	0.0868 (7)	0.1123 (8)	0.0380 (4)	−0.0333 (6)	−0.0096 (4)	−0.0165 (4)
Cl2	0.0940 (8)	0.1317 (10)	0.0678 (6)	−0.0311 (7)	−0.0373 (6)	0.0394 (6)

Geometric parameters (Å, º) top

C1—C2	1.379 (4)	C20—C29	1.423 (4)
C1—C6	1.380 (4)	C21—C22	1.418 (4)
C1—H1	0.9300	C21—H21	0.9300
C2—C3	1.373 (4)	C22—C23	1.355 (5)
C2—H2	0.9300	C22—H22	0.9300
C3—C4	1.376 (4)	C23—C24	1.418 (4)
C3—Cl2	1.734 (3)	C23—H23	0.9300
C4—C5	1.378 (4)	C24—C29	1.398 (4)
C4—H4	0.9300	C24—C25	1.411 (5)
C5—C6	1.392 (3)	C25—C26	1.368 (5)
C5—H5	0.9300	C25—H25	0.9300
C6—C7	1.472 (3)	C26—C27	1.408 (4)
C7—O2	1.297 (3)	C26—H26	0.9300
C7—C8	1.405 (3)	C27—C28	1.369 (4)
C8—C17	1.443 (3)	C27—H27	0.9300
C8—C9	1.485 (3)	C28—C29	1.417 (4)
C9—C19	1.399 (3)	C30—C31	1.372 (4)
C9—C10	1.425 (4)	C30—C39	1.431 (3)
C9—H9	0.9800	C31—C32	1.403 (4)
C10—O1	1.262 (3)	C31—H31	0.9300
C10—C11	1.493 (3)	C32—C33	1.355 (5)
C11—C16	1.381 (4)	C32—H32	0.9300
C11—C12	1.389 (4)	C33—C34	1.409 (4)
C12—C13	1.381 (4)	C33—H33	0.9300
C12—H12	0.9300	C34—C35	1.416 (4)
C13—C14	1.375 (4)	C34—C39	1.423 (3)
C13—H13	0.9300	C35—C36	1.350 (5)
C14—C15	1.377 (4)	C35—H35	0.9300
C14—Cl1	1.738 (3)	C36—C37	1.403 (4)
C15—C16	1.385 (4)	C36—H36	0.9300
C15—H15	0.9300	C37—C38	1.373 (4)
C16—H16	0.9300	C37—H37	0.9300
C17—C18	1.387 (3)	C38—C39	1.424 (4)
C17—C30	1.486 (3)	C38—C40	1.484 (4)
C18—C19	1.431 (3)	C40—O3	1.222 (3)
C18—C28	1.455 (4)	C40—O4	1.305 (3)
C19—C20	1.485 (3)	O4—H4'	0.842 (10)
C20—C21	1.381 (4)

C2—C1—C6	121.2 (3)	C29—C20—C19	105.0 (2)
C2—C1—H1	119.4	C20—C21—C22	118.9 (3)
C6—C1—H1	119.4	C20—C21—H21	120.6
C3—C2—C1	118.2 (3)	C22—C21—H21	120.6
C3—C2—H2	120.9	C23—C22—C21	122.8 (3)
C1—C2—H2	120.9	C23—C22—H22	118.6
C2—C3—C4	122.1 (3)	C21—C22—H22	118.6
C2—C3—Cl2	118.4 (3)	C22—C23—C24	120.7 (3)
C4—C3—Cl2	119.4 (2)	C22—C23—H23	119.6
C3—C4—C5	119.0 (3)	C24—C23—H23	119.6
C3—C4—H4	120.5	C29—C24—C25	116.7 (3)
C5—C4—H4	120.5	C29—C24—C23	115.8 (3)
C4—C5—C6	120.1 (3)	C25—C24—C23	127.5 (3)
C4—C5—H5	120.0	C26—C25—C24	120.5 (3)
C6—C5—H5	120.0	C26—C25—H25	119.7
C1—C6—C5	119.3 (2)	C24—C25—H25	119.7
C1—C6—C7	121.1 (2)	C25—C26—C27	122.3 (3)
C5—C6—C7	119.6 (2)	C25—C26—H26	118.9
O2—C7—C8	123.3 (2)	C27—C26—H26	118.9
O2—C7—C6	112.9 (2)	C28—C27—C26	118.8 (3)
C8—C7—C6	123.7 (2)	C28—C27—H27	120.6
C7—C8—C17	126.3 (2)	C26—C27—H27	120.6
C7—C8—C9	126.3 (2)	C27—C28—C29	119.0 (2)
C17—C8—C9	107.4 (2)	C27—C28—C18	136.0 (2)
C19—C9—C10	127.0 (2)	C29—C28—C18	104.9 (2)
C19—C9—C8	106.3 (2)	C24—C29—C28	122.7 (3)
C10—C9—C8	126.7 (2)	C24—C29—C20	124.3 (3)
C19—C9—H9	90.7	C28—C29—C20	112.9 (2)
C10—C9—H9	90.7	C31—C30—C39	118.9 (2)
C8—C9—H9	90.7	C31—C30—C17	119.2 (2)
O1—C10—C9	124.1 (2)	C39—C30—C17	121.7 (2)
O1—C10—C11	114.9 (2)	C30—C31—C32	121.6 (3)
C9—C10—C11	121.0 (2)	C30—C31—H31	119.2
C16—C11—C12	119.5 (2)	C32—C31—H31	119.2
C16—C11—C10	121.0 (2)	C33—C32—C31	119.8 (3)
C12—C11—C10	119.4 (2)	C33—C32—H32	120.1
C13—C12—C11	120.5 (3)	C31—C32—H32	120.1
C13—C12—H12	119.7	C32—C33—C34	120.9 (3)
C11—C12—H12	119.7	C32—C33—H33	119.6
C14—C13—C12	118.8 (3)	C34—C33—H33	119.6
C14—C13—H13	120.6	C33—C34—C35	121.6 (3)
C12—C13—H13	120.6	C33—C34—C39	119.4 (3)
C13—C14—C15	121.9 (3)	C35—C34—C39	119.0 (3)
C13—C14—Cl1	118.6 (2)	C36—C35—C34	121.6 (3)
C15—C14—Cl1	119.5 (2)	C36—C35—H35	119.2
C14—C15—C16	118.8 (3)	C34—C35—H35	119.2
C14—C15—H15	120.6	C35—C36—C37	119.8 (3)
C16—C15—H15	120.6	C35—C36—H36	120.1
C11—C16—C15	120.5 (3)	C37—C36—H36	120.1
C11—C16—H16	119.7	C38—C37—C36	120.6 (3)
C15—C16—H16	119.7	C38—C37—H37	119.7
C18—C17—C8	107.4 (2)	C36—C37—H37	119.7
C18—C17—C30	124.2 (2)	C37—C38—C39	120.7 (2)
C8—C17—C30	128.3 (2)	C37—C38—C40	117.1 (2)
C17—C18—C19	110.0 (2)	C39—C38—C40	121.0 (2)
C17—C18—C28	139.7 (2)	C34—C39—C38	117.6 (2)
C19—C18—C28	109.9 (2)	C34—C39—C30	118.2 (2)
C9—C19—C18	108.9 (2)	C38—C39—C30	124.2 (2)
C9—C19—C20	143.3 (2)	O3—C40—O4	124.3 (2)
C18—C19—C20	107.2 (2)	O3—C40—C38	120.0 (2)
C21—C20—C29	117.4 (2)	O4—C40—C38	115.5 (2)
C21—C20—C19	137.5 (3)	C40—O4—H4'	104 (3)

C6—C1—C2—C3	−1.0 (4)	C29—C20—C21—C22	1.8 (4)
C1—C2—C3—C4	2.5 (5)	C19—C20—C21—C22	178.7 (3)
C1—C2—C3—Cl2	−177.0 (2)	C20—C21—C22—C23	−2.0 (5)
C2—C3—C4—C5	−1.1 (5)	C21—C22—C23—C24	0.0 (5)
Cl2—C3—C4—C5	178.4 (2)	C22—C23—C24—C29	2.0 (5)
C3—C4—C5—C6	−1.8 (4)	C22—C23—C24—C25	−175.2 (3)
C2—C1—C6—C5	−1.8 (4)	C29—C24—C25—C26	0.1 (5)
C2—C1—C6—C7	−179.7 (2)	C23—C24—C25—C26	177.3 (3)
C4—C5—C6—C1	3.2 (4)	C24—C25—C26—C27	0.8 (5)
C4—C5—C6—C7	−178.8 (2)	C25—C26—C27—C28	−0.5 (5)
C1—C6—C7—O2	133.8 (3)	C26—C27—C28—C29	−0.6 (4)
C5—C6—C7—O2	−44.1 (3)	C26—C27—C28—C18	−176.6 (3)
C1—C6—C7—C8	−46.5 (4)	C17—C18—C28—C27	3.0 (6)
C5—C6—C7—C8	135.6 (3)	C19—C18—C28—C27	174.3 (3)
O2—C7—C8—C17	161.1 (3)	C17—C18—C28—C29	−173.4 (3)
C6—C7—C8—C17	−18.6 (4)	C19—C18—C28—C29	−2.2 (3)
O2—C7—C8—C9	−19.6 (4)	C25—C24—C29—C28	−1.2 (4)
C6—C7—C8—C9	160.8 (2)	C23—C24—C29—C28	−178.8 (3)
C7—C8—C9—C19	−177.7 (2)	C25—C24—C29—C20	175.4 (3)
C17—C8—C9—C19	1.8 (3)	C23—C24—C29—C20	−2.2 (4)
C7—C8—C9—C10	4.5 (4)	C27—C28—C29—C24	1.5 (4)
C17—C8—C9—C10	−176.0 (3)	C18—C28—C29—C24	178.7 (2)
C19—C9—C10—O1	−155.4 (3)	C27—C28—C29—C20	−175.5 (2)
C8—C9—C10—O1	21.9 (5)	C18—C28—C29—C20	1.7 (3)
C19—C9—C10—C11	24.2 (4)	C21—C20—C29—C24	0.3 (4)
C8—C9—C10—C11	−158.5 (2)	C19—C20—C29—C24	−177.5 (2)
O1—C10—C11—C16	−131.2 (3)	C21—C20—C29—C28	177.2 (2)
C9—C10—C11—C16	49.2 (4)	C19—C20—C29—C28	−0.6 (3)
O1—C10—C11—C12	44.0 (4)	C18—C17—C30—C31	−61.0 (4)
C9—C10—C11—C12	−135.7 (3)	C8—C17—C30—C31	122.7 (3)
C16—C11—C12—C13	−2.0 (4)	C18—C17—C30—C39	123.9 (3)
C10—C11—C12—C13	−177.2 (3)	C8—C17—C30—C39	−52.3 (4)
C11—C12—C13—C14	2.2 (5)	C39—C30—C31—C32	7.0 (4)
C12—C13—C14—C15	−0.7 (5)	C17—C30—C31—C32	−168.2 (3)
C12—C13—C14—Cl1	177.5 (2)	C30—C31—C32—C33	2.4 (5)
C13—C14—C15—C16	−0.9 (5)	C31—C32—C33—C34	−6.1 (5)
Cl1—C14—C15—C16	−179.1 (2)	C32—C33—C34—C35	−178.8 (3)
C12—C11—C16—C15	0.3 (4)	C32—C33—C34—C39	0.3 (4)
C10—C11—C16—C15	175.5 (3)	C33—C34—C35—C36	178.6 (3)
C14—C15—C16—C11	1.1 (4)	C39—C34—C35—C36	−0.6 (4)
C7—C8—C17—C18	178.7 (2)	C34—C35—C36—C37	−4.6 (5)
C9—C8—C17—C18	−0.7 (3)	C35—C36—C37—C38	2.8 (5)
C7—C8—C17—C30	−4.5 (4)	C36—C37—C38—C39	4.2 (4)
C9—C8—C17—C30	176.1 (2)	C36—C37—C38—C40	−163.6 (3)
C8—C17—C18—C19	−0.6 (3)	C33—C34—C39—C38	−171.9 (2)
C30—C17—C18—C19	−177.5 (2)	C35—C34—C39—C38	7.2 (4)
C8—C17—C18—C28	170.7 (3)	C33—C34—C39—C30	8.9 (4)
C30—C17—C18—C28	−6.3 (5)	C35—C34—C39—C30	−171.9 (2)
C10—C9—C19—C18	175.7 (3)	C37—C38—C39—C34	−9.1 (4)
C8—C9—C19—C18	−2.1 (3)	C40—C38—C39—C34	158.2 (2)
C10—C9—C19—C20	5.2 (6)	C37—C38—C39—C30	170.0 (3)
C8—C9—C19—C20	−172.6 (3)	C40—C38—C39—C30	−22.7 (4)
C17—C18—C19—C9	1.8 (3)	C31—C30—C39—C34	−12.4 (4)
C28—C18—C19—C9	−172.2 (2)	C17—C30—C39—C34	162.6 (2)
C17—C18—C19—C20	175.8 (2)	C31—C30—C39—C38	168.5 (2)
C28—C18—C19—C20	1.8 (3)	C17—C30—C39—C38	−16.5 (4)
C9—C19—C20—C21	−7.3 (6)	C37—C38—C40—O3	125.5 (3)
C18—C19—C20—C21	−177.9 (3)	C39—C38—C40—O3	−42.2 (4)
C9—C19—C20—C29	169.8 (3)	C37—C38—C40—O4	−50.1 (3)
C18—C19—C20—C29	−0.7 (3)	C39—C38—C40—O4	142.2 (3)

Hydrogen-bond geometry (Å, º) top

Cg1 is the centroid of the C18–C20/C28/C29 ring, Cg2 is the centroid of the C24–C29 ring and Cg3 is the centroid of the C11–C16 ring.

D—H···A	D—H	H···A	D···A	D—H···A
O4—H4′···O3ⁱ	0.84 (1)	1.81 (1)	2.649 (3)	177 (5)
C26—H26)···O3ⁱⁱ	0.93	2.52	3.416 (4)	163
C32—H32···O2ⁱⁱⁱ	0.93	2.47	3.301 (4)	149
C35—H35···Cl2^iv	0.93	2.74	3.619 (3)	157
C2—H2···Cg1^v	0.93	2.87	3.577 (3)	134
C12—H12···Cg2^vi	0.93	2.84	3.725 (3)	160
C21—H21···Cg3	0.93	2.57	3.425 (3)	152

Symmetry codes: (i) −x, −y+1, −z+2; (ii) −x+1, −y+1, −z+2; (iii) x+1, y, z; (iv) −x+1, −y, −z+3; (v) −x+1, −y, −z+2; (vi) x−1, y, z.

Acknowledgements

JPJ and CK are obliged to Dr S. Prathapan for introducing them to the field of domino reactions. SAIF (STIC) CUSAT, Kochi, India, provided spectroscopic, analytical and single crystal X-ray diffraction data.

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