The crystal structure of triphenylstannoxytetraphenylcyclopentadienyl tricarbonylmanganese

Abstract

X-Ray crystal-structure analysis of a compound originally thought to contain a covalent Sn–Mn linkage has shown that the molecule is properly formulated as triphenylstannoxytetraphenylcyclopentadienyl tricarbonylmanganese and contains no metal–metal bond.

Crystals have unit cell constant a= 10·49, b= 17·58, c= 22·11 Å, β= 90° 15′, space group P2₁/n with four molecules in the cell. The crystal structure was solved by the heavy atom method of phase determination and refined by Fourier and least-squares procedures to a final R, for 2870 reflections, of 7·1%.

The structure contains an unexpected feature, the σ-bonds linking the five substituents to the cyclopentadienyl ring being uniformly bent out of the ring plana by about 6° in a direction away from the manganese atom.