METALLATION OF TRIS(1-PYRAZOLYL)METHANE BY DIMETHYLPLATINUM(II)

Article abstract of DOI:10.1016/S0022-328X(00)83400-2

Tris(1-pyrazolyl)methane (HCpz3) reacts with Pt(CH3)2(COD) to form Pt(CH3)2(HCpz3), and when this complex is heated in pyridine metallation of the pyrazole ring at C(5) occurs to form Pt(CH3)(HCpz2(pzH_-1))(py).A triphenylphosphine derivative, Pt(CH3)(HCpz2(pzH_-1))(PPh3)2, when slowly heated to 185 deg C forms Pt(HCpz2(pzH_-1))(C6H4PPh2); this complex has both the nitrogen and phosphorus donor ligands metallated to form six and four-membered rings, respectively.