The crystal and molecular structure of trichlorosilyltetracarbonylcobalt, Co(SiCl3)(CO)4, has been determined from threedimensional X-ray data collected by counter methods. The structure has been refined by least-squares techniques, until the R factor for 664 intensities above background is 3.4%. The material crystallizes in space group C2h5-P21/c of the monoclinic system, with four molecules in a cell of dimensions a = 8.561, b = 10.888, c = 11.657 A; β = 99° 47’. Molecules of Co(SiCl3)(CO)4 are well-separated in the solid state, the shortest Co…Co distance being 6.42 A. The molecules exhibit slight, but significant, deviations from C3v symmetry. The configuration of the Co atom is trigonal bipyramidal; that of the Si atom is tetrahedral. The three equatorial carbonyl groups are displaced out of the equatorial plane toward the Si atom and are in a staggered conformation with respect to the Cl atoms. The Si-Co bond length is 2.254 ± 0.003 A.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Inorganic Chemistry