Crystal structure of dicarbonyl(thiocarbonyl)bis(triphenylphosphine)iridium(I) hexafluorophosphate–acetone

Abstract

Crystals of the title compound are monoclinic with a= 15·199, b= 23·814, c= 13·383 Å, β= 119·07°, Z= 4 space group P2₁/m. 7113 visually estimated intensities were used, and the structure refined to R 9·83%. There are two crystallographically independent cations each possessing a mirror plane. The iridium atoms are at the centre of a trigonal bipyramid with the PPh₃ ligands at the apices and the CO and CS groups co-planar with the iridium atoms in the equatorial plane. Mean thiocarbonyl bonding parameters are: Ir–C(S) 1·867, C–S 1·511 Å; Ir–C–S = 178·2°. The σ and π bonding properties of the CO and CS groups are compared.