[μ-1,6-Bis(diphenyl­arsan­yl)hexa­ne]bis­[chloridogold(I)]

Omar bin Shawkataly; Abu Tariq; Imthyaz Ahmad Khan; Chin Sing Yeap; Hoong-Kun Fun

doi:10.1107/S1600536811008646

. 2011 Mar 12;67(Pt 4):m427–m428. doi: 10.1107/S1600536811008646

[μ-1,6-Bis(diphenylarsanyl)hexane]bis[chloridogold(I)]

Omar bin Shawkataly ^a,^*,^‡, Abu Tariq ^a,^§, Imthyaz Ahmad Khan ^a, Chin Sing Yeap ^b,^¶, Hoong-Kun Fun ^b,^‡‡

PMCID: PMC3100007 PMID: 21753954

Abstract

In the title compound, [Au₂Cl₂(C₃₀H₃₂As₂)], each Au atom is coordinated by As and Cl atoms in an approximately linear geometry. In the crystal, molecules are linked into two-dimensional networks parallel to the ac plane via intermolecular C—H⋯Cl interactions. One of the phenyl rings is disordered over two positions, with site occupancies of 0.518 (8) and 0.482 (8).

Related literature

For general background and applications of diphenylarsino derivatives, see: Hill et al. (1983 ▶). For general background and applications of gold(I) complexes, see: Parish & Cottrill (1987 ▶); Tiekink (2002 ▶). For the synthesis of (CH₃)₂SAuCl, see: Francis (1901 ▶). For the synthesis of 1,6-bis(diphenylarsino)hexane, see: Shawkataly et al. (2009 ▶). For a closely related structure, see: Shawkataly et al. (2010 ▶). For the stability of the temperature controller used in the data collection, see: Cosier & Glazer (1986 ▶). For a description of the Cambridge Structural Database, see: Allen (2002 ▶).

Experimental

Crystal data

[Au₂Cl₂(C₃₀H₃₂As₂)]
M _r = 1007.23
Triclinic,
a = 9.4881 (3) Å
b = 11.0350 (4) Å
c = 15.5254 (5) Å
α = 69.723 (1)°
β = 83.959 (1)°
γ = 79.814 (1)°
V = 1499.06 (9) Å³
Z = 2
Mo Kα radiation
μ = 12.16 mm⁻¹
T = 100 K
0.37 × 0.22 × 0.09 mm

Data collection

Bruker SMART APEXII CCD area-detector diffractometer
Absorption correction: multi-scan (SADABS; Bruker, 2009 ▶) T _min = 0.094, T _max = 0.407
23816 measured reflections
7451 independent reflections
6817 reflections with I > 2σ(I)
R _int = 0.027

Refinement

R[F ² > 2σ(F ²)] = 0.031
wR(F ²) = 0.088
S = 1.09
7451 reflections
371 parameters
H-atom parameters constrained
Δρ_max = 2.52 e Å⁻³
Δρ_min = −3.00 e Å⁻³

Data collection: APEX2 (Bruker, 2009 ▶); cell refinement: SAINT (Bruker, 2009 ▶); data reduction: SAINT; program(s) used to solve structure: SHELXTL (Sheldrick, 2008 ▶); program(s) used to refine structure: SHELXTL; molecular graphics: SHELXTL; software used to prepare material for publication: SHELXTL and PLATON (Spek, 2009) ▶.

Supplementary Material

Crystal structure: contains datablocks I, global. DOI: 10.1107/S1600536811008646/is2685sup1.cif

e-67-0m427-sup1.cif^{(28.5KB, cif)}

Structure factors: contains datablocks I. DOI: 10.1107/S1600536811008646/is2685Isup2.hkl

e-67-0m427-Isup2.hkl^{(364.5KB, hkl)}

Additional supplementary materials: crystallographic information; 3D view; checkCIF report

Table 1. Selected geometric parameters (Å, °).

Au1—Cl1	2.3043 (10)
Au1—As1	2.3411 (4)
Au2—Cl2	2.3005 (10)
Au2—As2	2.3398 (5)

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Cl1—Au1—As1	174.77 (3)
Cl2—Au2—As2	175.14 (3)

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Table 2. Hydrogen-bond geometry (Å, °).

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
C17—H17B⋯Cl2ⁱ	0.97	2.79	3.754 (5)	172
C18—H18A⋯Cl1ⁱⁱ	0.97	2.80	3.701 (5)	155

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Symmetry codes: (i) Inline graphic ; (ii) .

Acknowledgments

The authors would like to thank the Malaysian Government and Universiti Sains Malaysia (USM) for the University Research Grant 1001/PJJAUH/811115. AT is grateful to USM for a post-doctoral Fellowship. IAK is grateful to USM for a Visiting Research Fellowship and to Gokhale Centenary College, Ankola, India, for study leave. HKF and CSY thank USM for the Research University Grant No. 1001/PFIZIK/811160.

supplementary crystallographic information

Comment

Gold and gold complexes have been used for medicinal purposes over a long period of time (Parish & Cottrill, 1987; Tiekink, 2002). 1,6-Bis(diphenylarsino)hexane has been used for trans chelation in transition metal complexes (Hill et al., 1983). A search of the November 2010 release of the Cambridge Structural Database (Allen, 2002) revealed no such gold (I) complexes containing the above ligand has been reported. Herein, we report the crystal structure of the title complex (Ph)₂As(CH₂)₆As(Ph)₂Au₂Cl₂ (Fig. 1).

The As1—Au1—Cl1 is almost linear with an angle of 174.77 (3)° and As2—Au2—Cl2 with an angle of 175.14 (3)°. The four substituted phenyl rings on both arsines C1—C6/C7—C12, C19—C24/C25,C26B—C30B and C19—C24/C25,C26A—C30A are inclined to one another, with dihedral angles of 69.1 (4), 85.9 (4) and 73.4 (4)°, respectively.

In the crystal packing, (Fig. 2), the molecules are linked into two-dimensional networks parallel to the (010) plane via intermolecular C17—H17B···Cl2 and C18—H18A···Cl1 interactions (Table 2).

Experimental

(Ph)₂As(CH₂)₆As(Ph)₂AuCl was prepared by mixing equimolar quantities of Me₂SAuCl, obtained as per conventional method (Francis, 1901) and (Ph)₂As(CH₂)₆As(Ph)₂, synthesized according to related literature (Shawkataly et al., 2009) in CH₂Cl₂ held at room temperature. The solution was stirred for 2 h, and white crystalline solid was recovered after the removal of solvent under vacuum. The colourless plate-like crystals were obtained in 90% yield by solvent/solvent diffusion of dichloromethane/methanol at 10 °C after 2 days (m.p. 203 °C).