SYNTHESIS AND THEORETICAL-STUDIES OF A DIORGANOHYDRIDOPLATINUM(IV) COMPLEX, N,N',N'')([(PZ)(3)BH](-)=TRIS(PYRAZOL-1-YL)BORATE)

The platinum(II) tris(pyrazol-1-yl)borate complex [PtMe(2){(pz)(3)BH-N ,N'}]- reacts with phenol or aqueous HBF4 in acetone to form the dimet hylhydridoplatinum(IV) complex PtHMe(2){(pz)3BH-N,N',N ''). The comple x decomposes above similar to 140 degrees C in toluene-d(8) to give me thane. Theoretical calculations at the SCF and MP2 levels for the spec ies PtXMe(2){(H2C=N-NH)(3)BH-N,N',N ''} (where X = H, OH, Me and the f ragment [(H2C=N-NH)(3)BH](-) is a model for [(pz)(3)BH](-)) yield geom etries that compare well with structural reports for Pt(OH)Me(2){(pz)( 3)BH} and PdMe(3){(pz)(3)BH}.