An X-ray diffraction study has shown that the product of the reaction between cis-bis(trifluoromethyl)-1,2-dithietene, S2C2-(CF3)2, and chlorotriphenylphosphinegold, (CeH3)3PAuCl, is the unexpected compound chlorotriphenylphosphonium bis(cis-1,2-bis(trifluoromethyl)ethene-l,2-dithiolato)gold, [PCl(C6H5)3] [Au(S2C2(CF3)2)2]. The compound crystallizes in space group C2h 5-P21/n of the monoclinic system with four molecules in a cell of dimensions a = 13.166 (10), b = 11.623 (9), c = 20.486 (15) Å, and β = 91.21 (2)°. The calculated and observed densities are 2.01 and 2.03 (2) g cm−3. Least-squares refinement of the structure has led to a final value of the conventional R factor of 0.070 for the 1858 reflections, observed by counter methods, for which F°2 >3σ(F°2). The structure consists of well-separated ions. The coordination about the Au atom of the anion is square planar, with the four independent Au-S distances ranging from 2.282 (8) to 2.296 (8) Å. The S-Au-S angles range from 89.6 (3) to 90.6 (3)°. The S⋯S intra- and interligand distances, which range from 3.225 (11) to 3.254 (11) Å, are considerably longer than those previously observed in square-planar dithiolate complexes. The chlorotri¬phenylphosphonium cation has nearly tetrahedral geometry; the P-Cl distance is 1.98 (1) Å and the three P-C distances are in the range 1.76-1.77 (2)Å.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Inorganic Chemistry