Multiple bonds involving aluminum and gallium atoms

Abstract

Publisher Summary The concept of aluminum or gallium engaging in multiple bonding is intellectually intriguing and experimentally challenging. With the advent of the one-electron at-bond and the experimental realization of the first gallium–gallium triple bond. An important concept of π-bonding in A1–A1 bonds is embraced. The significance of the bis(trimethylsilyl)methyl ligand system in the stabilization of this compound was noted as offering desirable steric shielding and effective electron donating abilities. This chapter discusses the multiple bonds involving aluminum and gallium atoms. The multiple bonds discussed are the Al–Al one-electron π-bond. The organogallium compounds containing multiple bonds are also reviewed. Initial evidence of gallium multiple bonds one-electron Ga–Ga π-bonds are provided. Pivotal in the preparation of the first organometallic gallane is the bis(dioxane) adduct of gallium(II) bromide, Ga 2 Br 4 (dioxane) 2 , which resides about a Ga–Ga bond at a distance of 2.396(6) A. The cyclogallenes and metallaromaticity of gallium rings are also focused. The synthesis and molecular structure of gallyne is described by reviewing a case for gallium–gallium triple bonds.