Michaelis–Arbuzov intermediates: X-ray crystal structures of the methyl bromide adducts of neopentyl diphenylphosphinite and dineopentyl phenylphosphonite

Abstract

Single crystal X-ray structure determinations of the Michaelis–Arbuzov intermediates Ph₂Me(Bu^t-CH₂O)P⁺Br^– and PhMe(Bu^tCH₂O)₂P⁺Br^– clearly demonstrate that these species are four-co-ordinate phosphonium salts.