The molecular and crystal structure of an allylpalladium- (II) triazenido complex: [(1-3-η-C3H5)Pd(II)(p-CH3C6H4NNNC6H4CH3-p)]2

For the class of compounds mentioned in the title it is difficult to the stucture unambiguously on the molecular and crystal structure of CH₃-p)]₂ by single crystal X-ray analysis. The crystal data are: M == 743 a.m.u. Space group P2₁/c. a = 8.510(2), b = 40.652(9), c = 9.762(2) Å, β = 103.61(2)° D_c = 1.50 g/cm³. R = 0.041, R = 0.060, based on 3978 independent reflections. The two π-allylpalladium residues are bridged azenido groups, gaining an approximate square planar coordination around each heavy atom. The two allyl units are stereochemically equivalent, with the central carbon atoms pointing outwars. The rigid triazenido groups force the two palladium atoms into close contact (2.86 Å). The aromatic rings are somewhat rotated with respect to the bonded NNN planes, but some π-conjugation over the whole ligand is still retained.