Synthesis of a Platinum Complex with a Derivative of Monomeric Metathiophosphoric Acid as η2‐Ligand

The first complex to contain a π-bonded metathiophosphoric derivative has been prepared from R3C(SiR3)NP(S)NCR3 and L2Pt(C2H4). The two (CH3)3C groups are equivalent at room temperature; structure (a) was confirmed by X-ray methods. Its dynamic behavior at low temperature can be explained by participation of form (b) with pentacoordinated silicon (R = CH3, L = PPh3).