Dimethyl borate, platinum complexes

Unsubstituted tris(pyrazolyl)borate has been used to stabilize trimethyl, dimethylhydrido, dimethyl(hydroxido), dimethyl(carboxylato), and dimethylthiolato complexes 983-9857 The dimethyl(hydrido)platinum(iv) complex 986 was characterized by comparison of the NMR data with the above-related complexes, and theoretical calculations of a tris(iminoamino)borate complex provided reasonable results for the Pt(iv) complex with a hydride ligand 987 rather than a potential Pt(ii) hydrogen-bonded species 9887 ... 

The dimethyl(hydrido)platinum(iv) complex with tris(3,5-dimethylpyrazolyl)borate (Tp ) as a ligand 992 can be obtained as a stable complex by protonolysis of the anionic dimethylplatinum(ii) complex (Equation (185))7 Similar reactions of HCl and Mel with the dimethyl and diphenyl complexes produce trimethyl-, diphenyl(hydrido)-, and diphenyl(methyl)platinum(iv) complexes. Addition of B(G6F5)3 to the platinate in hydrocarbon solvents leads to a dialkyl(hydrido)platinum(iv) complex 993, probably via abstraction of a methyl ligand followed by oxidative addition of the solvent to the Pt(ii) center (Equation (186)). ... 

A trimethylplatinum(iv) complex with tris(3,5-bistrifluoromethylpyrazolyl)borate as a ligand has been prepared and studied by H-F two-dimensional NMR spectroscopy the spectra exhibit long-range G-H-F-C interaction which is evidenced also by IR spectra.1,4,7-Triazacyclononane coordinates to the Pt(ii) center as a bidentate ligand and to the Pt(iv) center as a facial tridentate ligand. Square-planar dimethylplatinum(ii) complex 1006 is in equilibrium with the octahedral hydrido (dimethyl)platinum(iv) complex 1007 in MeOH via reversible protonation of the Pt(ii)... 

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