Inorganic Chemistry, Vol.55, No.3, 1017-1021, 2016
Unexpected Formation of Early Late Heterobimetallic Complexes from Transition Metal Frustrated Lewis Pairs
Reaction of transition metal "frustrated" Lewis pair compounds of the type [Cp2Zr(Me)(OC(CF3)(2)(CH2PBu2)-Bu-t)] with the low valent platinum species [Pt(norbornene)(3)] leads to the unexpected formation of a heterobimetallic species [Cp2Zr{Pt(Me)}(OC(CF3)(2)(CH2PBu2)-Bu-t)]. Single crystal X-ray analysis reveals an unusual T-shaped geometry at the platinum center, with a relevant C-Pt-P angle of 163.3(3)degrees. Treatment of this compound with PMe3 yields [Pt(PMe3)(4)] and regenerates the zirconium precursor. Treatment with [(Et2O)(2)H] [B(C6FS)(4)] protonates off the methyl ligand to give an ether adduct at platinum. Analogous observations are made with titanium-platinum species. We propose the chemistry is best rationalized as a formal insertion of Pt(0) into a Zr-C or Ti-Cl bond.