Transition metal complexes containing phosphorus ligands. XII. Cationic dialkyl phenylphosphonite and alkyl diphenylphosphinite derivatives of copper, silver, gold and the platinum metals

Article abstract of DOI:10.1021/ic50132a045

Ligand displacement reactions performed in polar solvents afford a convenient general route to an extensive series of cationic complexes containing dialkyl phenylphosphonite, P(OR)₂Ph, and alkyl diphenylphosphinite, P(OR)Ph₂, ligands (R = Me, Et) which may be isolated as their tetraphenylborate salts. These products were characterized by elemental analysis, proton nmr spectroscopy, and conductivity measurements. Complex cations isolated and characterized in this manner include the hydrides [RuHL′₅]⁺ and [IrHL′₅]²⁺, the dinuclear species [L₃RuX₃RuL₃]⁺, and the mononuclear cations [RuL′⁶]²⁺, [IrL′₅]⁺, [IrL₄]⁺, [PdL₄]²⁺, [PtL₄]²⁺, [CuL₄]⁺, [AgL₄]⁺, and [AuL₄]⁺ [L′ = P(OMe)₂Ph; L = P(OR)₂Ph, P(OR)Ph₂; R = Me, Et; X = Cl, Br]. Qualitative descriptions of the coupling patterns observed in the nmr spectra of the complex cations are given and are interpreted in terms of ligand dissociation and rearrangement processes.