CYCLOPALLADATED COMPLEXES - SYNTHESIS AND CRYSTAL-STRUCTURE OF DI-MU-CHLORO-BIS[2',6'-DIMETHYLAZOBENZENATO-C2,N2)PALLADIUM(II)]

C28H26Cl2N4Pd2, M(r) = 702.25, monoclinic, P2(1)/n, a = 12.993 (3), b = 11.739 (3), c = 27.592 (7) angstrom, beta = 99.29 (2)degrees, V = 4153 (2) angstrom 3, Z = 6, D(x) = 1.69 g cm-3, lambda(Mo K-alpha) = 0.71073 angstrom, mu = 15.0 cm-1, F(000) = 2088, T = 298 K, R = 0.053 and wR = 0.045 for 4341 reflections with I > 3-sigma(I). The complex has a dimeric structure with the 2',6'-dimethylazobenzene ligands, HL, mutually trans with respect to the Pd-Pd axis, and bonded to Pd(II) atoms which have a square-planar geometry. The two [(L)Pd] moieties are connected by two bridging Cl atoms. The Pd2Cl2 core is planar.