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Studies of the smaller boron hydrides and their derivatives

1977; International Union of Pure and Applied Chemistry; Volume: 49; Issue: 6 Linguagem: Inglês

10.1351/pac197749060717

1365-3075

Sheldon G. Shore,

Boron and Carbon Nanomaterials Research

Abstract A survey of systematic studies of the smaller boron hydrides is presented. Relative Bronsted acidities have been determined and the Lewis base properties of anions derived by removing a bridge proton have been investigated. Addition of BH 3 to these anions results in expanded borane anion structures. These expanded structures can be converted on a large scale to B 5 H ll, B 6 H 10 , and B 6 H 12 in high yield. Principles are described for preparing certain specifically methyl substituted derivatives of the smaller boron hydrides and boron hydride anions. The nature of the basic boron-boron site in B 6 H 10 and in boron hydride anions is discussed with respect to fluxional properties and the formation of selected metalloboranes. The structures and properties of some bis-ligand adducts of B 5 H 9 and B 6 H 10 (B 5 H 9 L 2 and B 6 H 10 L 2 ) and their relationships to the hypho class of cluster systems is discussed.