PHOTOCHEMICAL C-SB BOND FISSION IN A PALLADIUM DISTIBINE COMPLEX - SYNTHESIS AND STRUCTURE OF [PD-2(MU-PH(2)SBCH(2)SBPH(2))(2)CL(2)PH(2)]

Photolysis of [Pd(Ph(2)SbCH(2)SbPh(2))(2)Cl-2] in CH2Cl2 generates the dimeric sigma-phenyl complex [Pd-2(mu-Ph(2)SbCH(2)SbPh(2))(2)Cl(2)Ph(2)]. The X-ray structure of the title compound was found to be monoclinic with space group P2/alpha (alpha = 11.527(8), b = 20.264(5), c = 12.717(4) Angstrom, beta = 112.12(8)degrees, Z = 2). The data was refined to R = 0.033 on the basis of 3462 reflections (F > 4 sigma(F)). The dimeric discrete centrosymmetric molecule contains bridging distibine ligands (Pd-Sb 2.560(1), 2.530(1) Angstrom. The square planar geometry at Pd has trans Sb donors and trans CL and phenyl groups.