Syntheses and spectroscopic studies of diphenylphosphinato derivatives of boron

Summary 2-Diphenylphosphinato-1,3,2-dioxaborolanes and -borinanes of the type (whereG = -CH2CHMe-, -CH2CH2CH2-, -CH2CH2CHMe-,-CMe2CMe2-, -CMe2CH2CHMe-,-CH2CMe2CH2-, -CH2CEt2CH2-, and -C6H4-) are obtained by the reaction of diphenylphosphinic acid with the corresponding 2,2'-oxo-bis-1,3,2-dioxaborolanes and-borinanes. The products are white crystalline solids, which have sharp melting points and are hydrolytically stable. They have been characterized by elemental analysis, IR and multinuclear NMR (11B,31P, and119Sn) studies. The data suggest structures with monodentate phosphinato moieties and 3-coordinated boron atoms.