Element Derivatives of Sterically Encumbering Terphenyl Ligands

Abstract

Publisher Summary The use of sterically crowding ligands to manipulate reactivity and to effect the stabilization of previously unknown bonding types, geometries, or electron configurations is one of the major themes of inorganic and organometallic chemistry. This chapter reviews the element derivatives of sterically encumbering terphenyl ligands. Bulky ligands use large organic substituents at a first-row element through which they are bound to a desired site. The precursors to the bulky terphenyl ligands and their derivatives are discussed. Terphenyl derivatives of s -block elements comprise group 1 and group 2 terphenyl derivatives. After the halide starting materials themselves, the alkali metal salts are the most important terphenyl compounds. This is a result of their widespread and almost exclusive use as transfer agents for terphenyl ligands. Main group 2 terphenyl compounds are of potential importance. As their lithium analogues, magnesium derivatives, such as the Grignard reagents have applications as ligand transfer agents. The use of terphenyl ligands may affect the stabilization of multiply bonded or catenated derivatives of the lightest element, beryllium, about which very little is currently known. Terphenyl derivatives of p -block elements include group 13, 14, 15, 16, and 17 terphenyl derivatives. Terphenyl derivatives of d -block and group 12 elements are also described, which comprises transition-metal derivatives.