CRYSTAL AND MOLECULAR STRUCTURE OF MU-CHLORO-(DICHLOROMETHYLTIN)-2,2'-BIPYRIDYLTRICARBONYLMOLYBDENUM (C10H8N2)(CO)3CLMOSNCH3CL2

The crystal structure determination of bipy(CO)3ClMoSnCH5Cl2 (bipy = 2,2′-bipyridyl) by single-crystal X-ray techniques is described. The discrepancy index for 1924 unique observations is R1 = 5.6%. Data were collected with a pailred fully automated diffractometer. The compound crystallizes in the monoclinic space group C2h5-P21/c with a = 6.73 ± 0.01 Å, b = 11.14 ± 0.01 Å, c = 24.46 ± 0.03 Å, and β = 90.5 ± 0.2°. The monomeric molecule contains a molybdenumtin bond of length 2.753 ± 0.003 Å, bridged by a chlorine atom. Thus the molybdenum atom is heptacoordinate and the tin is pentacoordinate, The stereochemistry around the molybdenum is that of a capped octahedron with the tin atom lying above an octahedral face formed by the bridging chlorine atom and two carbonyl groups. The bipyridyl group exhibits a small but significant deviation from planarity. © 1969, American Chemical Society. All rights reserved.