Nuclear magnetic resonance studies of tertiary phosphine hydrobromides

Abstract

Phosphorus and proton magnetic resonance data are presented for hydrobromides of 15 tertiary phosphines, of which 5 are trialkylphosphines, 5 are dialkylphenylphosphines, and 5 are diphenylalkylphosphines. The 31P chemical shifts of each of these series of phosphonium compounds are linearly related to the sum of the group contributions (g.c.) of the organic groups on the respective phosphines.