Unconventional multiple bonds: Coordination compounds of unstable Vth main group ligands

Abstract

Phosphinidene-, arsinidene- and stibinidene-complexes LnM-X(R)-MLn(X = P, As, Sb) contain the main group center X in a trigonally planar environment. The properties of these species are dominated by strong backbonding from filled metal orbitals at the_16 electron groups LnM into the vacant p orbital of the sextett species R-X. The synthesis and properties of LnM—X(R)—MLnspecies as well as their chemical interrelation to compounds containing R-X=X-R or IX=XI ligands will be reported. © 1986 IUPAC