Synthesis and theoretical studies of a diorganohydridoplatinum(IV) complex, PtHMe(2){(pz)(3)BH-N,N',N''}([(pz)(3)BH](-)=tris(pyrazol-1-yl)borate)

The platinum(II) tris(pyrazol-1-yl)borate complex [PtMe 2{(pz) 3BH-N1N′}] - reacts with phenol or aqueous HBF 4 in acetone to form the dimethylhydridoplatinum(IV) complex PtHMe 2{(pz) 3BH-N,N′,N″}. The complex decomposes above ∼140 °C in toluene-d 8 to give methane. Theoretical calculations at the SCF and MP2 levels for the species PtXMe 2{(H 2C=N-NH) 3BH-N,N′,N″} (where X = H, OH, Me and the fragment [(H 2C=-N-NH) 3BH] - is a model for [(pz) 3BH] -) yield geometries that compare well with structural reports for Pt(OH)-Me2{(pz) 3BH} and PdMe 3{(pz) 3BH}.