Nuclear magnetic resonance studies of the addition of hydrogen halides to trans-cyanohydridobis(triethylphosphine)platinum(II) and hydridotris(triethylphosphine)platinum(II) tetraphenylborate
Abstract
The complexes [Pt(CN)H2X(PEt3)2](X = Cl, Br, or I) have been identified by 1H and 31P n.m.r. spectroscopy at –80 °C as the initial products from the reaction of trans-[Pt(CN)H(PEt3)2] and HX. Similarly, [PtH(PEt3)3]+ and HCl yield [PtClH2(PEt3)3]+. In this case deuterium substitution indicates trans addition, but with the cyanide no distinction of cis or trans addition is possible. The platinum(IV) cyanides do not disproportionate and on warming to room temperature yield the mixed complexes trans-[Pt(CN)X(PEt3)2].