Received 17 July 2010
In the title compound, C21H21AsS3, the three benzene rings make dihedral angles of 88.41 (10), 87.75 (9) and 74.74 (10)° with each other. The methylsulfanyl groups are roughly coplanar with their attached benzene rings [C-S-C-C torsion angles = -7.6 (2), 11.2 (2) and 4.1 (2)°]. In the crystal, weak C-H interactions link the molecules.
For related structures of trisarylarsines with osmium and ruthenium, see: Cullen et al. (1995); Shawkataly et al. (2009a,b, 2010a,b). For the stability of the temperature controller used in the data collection, see: Cosier & Glazer (1986).
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 data and figures for this paper are available from the IUCr electronic archives (Reference: HB5559 ).
The authors would like to thank the Malaysian Government and Universiti Sains Malaysia (USM) for the Research grant No. 1001/PJJAUH/811115. IAK is grateful to USM for a Visiting Researcher position. HKF and CSY thank USM for the Research University Golden Goose grant No. 1001/PFIZIK/811012. CSY also thanks USM for the award of a USM Fellowship.
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