Synthesis and structures of heterodinuclear organoplatinum(or -palladium)-molybdenum(or -tungsten) complexes: Unexpected structural deformation of heterodinuclear propionylplatinum-tungsten complex having 1,2-bis(diphenylphosphino)ethane ligand

Heterodinuclear phenypalladium-molybdenum(or -tungsten) or acylplatinum-molybdenum(or -tungsten) complexes, L2RM-M′Cp(CO)3 (M = Pd, Pt, M′ = Mo, W, L2 = tmeda, bpy, phen, dppe, R = Ph, COEt, COCH2Me3) have been synthesized by metathetical reactions of PdPhIL2 with Na[MCp(CO)3] or CO insertion into Pt-C bond in corresponding alkyl analogues. The propionylplatinum-tungsten complex, (dppe)(EtCO)Pt-WCp(CO)3 shows apparent but unexpected structural deformation at Pt and W, giving twisted square-planar and four-leg piano-stool geometries, respectively.