Abstract

Herein, the synthesis of new low‐valent Group 14 phosphinidenide complexes [({SIDipp}P)2 m] exhibiting P–M pπ–pπ interactions (SIDipp=1,3‐bis(2,6‐diisopropylphenyl)‐imidazolidin‐2‐ylidene, M=Ge, Sn, Pb), is presented. These compounds were investigated by means of structural, spectroscopic, and quantum‐chemical methods. Furthermore, the monosubstituted compounds [(SIDippP)MX]2 (M=Sn, X=Cl; M=Pb, X=Br) are presented, which show dimeric structures instead of multiple bonding interaction.

Highlights

  • In 2010, the group of Robinson reported the synthesis of the first “parent” phosphinidene stabilized by complexation of the PH moiety with an N-heterocyclic carbene (NHC).[1]

  • The synthesis of phosphinidenes and the subsequent investigation of their characteristics have been a popular research area evinced by a considerable number of publications and review articles.[2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19]

  • Compounds with less sterically demanding substituents tend to dimerize in solution or solid state.[31]

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Summary

Introduction

In 2010, the group of Robinson reported the synthesis of the first “parent” phosphinidene stabilized by complexation of the PH moiety with an N-heterocyclic carbene (NHC).[1]. In 2010, the group of Robinson reported the synthesis of the first “parent” phosphinidene stabilized by complexation of the PH moiety with an N-heterocyclic carbene (NHC).[1] Since the synthesis of phosphinidenes and the subsequent investigation of their characteristics have been a popular research area evinced by a considerable number of publications and review articles.[2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19] Especially main-group moieties with NHC- or rather cAAC-stabilized phosphinidenide ligands (cAAC = cyclic (alkyl)(amino)carbene) are in the spotlight of recent research.

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