Crystal and molecular structure of tricarbonyl[(trimethylsilyl)-π-cyclopentadienyl]rhenium

Abstract

Crystals of the title compound are monoclinic, a= 6·716(2), b= 15·303(3), c= 27·328(5)Å, β= 103·24(4)°, Z= 8, space-group P2₁/c, two molecules per asymmetric unit. The structure was determined by Patterson and Fourier synthesis from diffractometer data and refined by full-matrix least-squares calculations to R 0·095 for 2460 observed reflections. The co-ordination around the central Re atom is octahedral, the OC–Re–CO angles ranging from 88 to 93(1·5)°. The Re–C(carbonyl) distances are 1·81–1·91 (4)Å and the Re–C–O angles 172–177(3)°. The distance from the rhenium atom to the centre of the (trimethylsilyl)cyclopentadienyl ring is 1·95(4)Å. The individual, Re–C(ring) distances are 2·26–2·40 Å, mean 2·30(4)Å.