Received 6 November 2012
The title compound, C32H29NP2S2, has two molecules in the asymmetric unit, with an r.m.s. difference of 0.218 Å in their best-fit overlay. Both molecules have a slightly distorted trigonal-planar N atom, bonded to two PV atoms and a C atom of the 4-ethylphenyl unit. The P-N-P angles of 126.34 (11) and 125.98 (11)° are larger than the four C-N-P bond angles. The two S atoms are trans to one another with respect to the P-N-P angle. The crystal structure features C-H interactions. The methyl group in one of the molecules is disordered over two sets of sites, with occupancies of 0.518 (6) and 0.482 (6).
For background to the chemistry of coordination compounds containing P-N bonds and for their applications, see: Hartley (1990); Greenwood & Earnshaw (1984); Balakrishna et al. (2000). For the ability of bis(diphenylphosphino)alkylaniline derivatives to form chelates with transition metal ions, see: Biricik et al. (2007); Fei & Dyson (2005). For the synthesis of the title and related compounds, see: Fernández et al. (2005); Gaw et al. (2002); Fei et al. (2004); Slawin et al. (2005).
Data collection: APEX2 (Bruker, 2008); cell refinement: SAINT-Plus (Bruker, 2008); data reduction: SAINT-Plus and XPREP (Bruker, 2008); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 2012); software used to prepare material for publication: WinGX (Farrugia, 2012).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: FJ2607 ).
The authors gratefully acknowledge the financial support of GMRDC, University of Fort Hare, South Africa.
Balakrishna, M. S., Panda, R., Smith, D. C. Jr, Kalamn, A. & Nolan, S. P. (2000). J. Organomet. Chem. 599, 159-165.
Biricik, N., Durap, F., Gümgüm, B., Fei, Z. & Scopelliti, R. (2007). Transition Met. Chem. 32, 877-883.
Bruker (2008). APEX2, SAINT-Plus, XPREP and SADABS. Bruker AXS Inc., Madison, Wisconsin, USA.
Farrugia, L. J. (2012). J. Appl. Cryst. 45, 849-854.
Fei, Z. & Dyson, P. J. (2005). Coord. Chem. Rev. 249, 2056-2074.
Fei, Z., Zhao, D., Biricik, N., Scopelliti, R. & Dyson, P. J. (2004). Inorg. Chem. 44, 2228-2230.
Fernández, I., Breher, F., Pregosin, P. S., Fei, Z. & Dyson, P. J. (2005). Inorg. Chem. 44, 7616-7623.
Gaw, K. G., Smith, M. B. & Steed, J. W. (2002). J. Organomet. Chem. 664, 294-297.
Greenwood, N. N. & Earnshaw, A. (1984). Chemistry of Elements, p. 619. Oxford: Pergamon Press.
Hartley, F. R. (1990). The Chemistry of Organophosphorus Compounds, p. 1. Manchester: Wiley.
Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.
Slawin, A. M. Z., Wheatley, J. & Woollins, J. D. (2005). Eur. J. Inorg. Chem. pp. 713-720.