CRYSTAL AND MOLECULAR-STRUCTURE OF DICHLOROBIS(ETHYL 3-OXOBUTANOATO)TIN(IV)

The crystal structure of dichlorosbis(ethyl 3-oxobutanoato)tin(IV), Cl2Sn(C6H9O3)2, has been determined from three-dimensional X-ray diffraction data. Unit-cell dimensions are a = 11.818(5), b = 10.408(4), c = 14.155(6) Å, space group Pbcn, Z = 4, Dc = 1.71 g cm-3 and Dm = 1.74 g cm-3. The structure was solved by the heavy-atom method from intensity data collected by diffractometric methods and refined by full-matrix least-square methods to R = 0068 for 1299 observed reflections. The coordination about the Sn atom is a slightly distorted octahedron. The ethyl 3-oxobutnoate acts as a bidentate ligand bonding to the tin atom through the oxygen atoms. The chloro groups are in cis positions and the molecular symmetry is C2. SnO(eq) bond length is 2.101(15) Å. The SnO(ax) and SnCl distances are 2.066(15) and 2.347(7) Å respectively. The CnSnCl angle is 98.1(1)°. © 1979.