Phosphine–borane derivatives. Part V. Phosphine adducts of mixed boron trihalides

Abstract

The investigation by proton nuclear magnetic resonance spectroscopy of the sparingly soluble adducts formed between phosphine and boron trihalides has led to the identification of the mixed species PH₃,BX₂Y (X ≠ Y = Cl, Br, I) PH₃BCIBrl, and probably PH₃BBr₂F and PH₃,BBrF₂. The n.m.r. parameters of PH₃,BX₃ are also reported as are those of the mixed [²H₃]methylphosphine–boron trihalide adducts, CD₃PH₂,BY₂Z (Y ≠ Z = F, Cl, Br, I) and of CD₃PH₂,BY₃ for comparison.