Complexes of P-stabilised carbanions with s-and p-elements

摘要

The chemistry f complexes of the main group metals (Groups 1,2,13, 14, and 15, inlcuding Si and As) with P-stabilised carbanions is described. Such ligands, in which a carbanion centre is immediately adjacent to a P(Ⅲ) or P(V) centre are remarkably versatile and adopt a wide range of coordination modes, depending on the nature of the metal centre, the presence of co-ligands and the ligand substituents; certain main group derivatives have also found applications in organic synthesis, especially for the olefination of carbonyl compounds (Horner, or Horner-Wadsworth-Emmons reagents).The focus of the review is on complexes which have been structural characterised, either by crystallographic means or by unambiguous spectroscopic evidence.