Synthese und Struktur aminosubstituierter Tetraphosphetane / Synthesis and Structure of Amino-Substituted Tetraphosphetanes

Abstract

A number of aminotetraphosphetanes could be obtained by reductive dehalogenation of dichlorophosphines with magnesium as well as by elimination of chlorotrimethylsilane from vicinal chlorosily-functionalized biphosphines and from [2+2]-cyclodimerization of aminodiphosphenes, respectively. The molecular structures of several tetraphosphetanes are reported and discussed. The torsion-angle of the four-membered rings varies from 22.5° to 45.7°, depending on the size and electronegativity of the exocyclic ligands.