Chemistry of closo-Dodecaborate Anion [B12H12]2-: A Review

Abstract

Synthesis and chemical properties of the closo-dodecaborate anion [B12H12]2- and its derivatives are reviewed. Attention is also paid to potential applications of the closo-dodecaborate derivatives with emphasis on medical applications. A review with 325 references.

Synthesis and Characterization of 2‐Mono‐ and 1,2‐Diaminocarba‐closo‐dodecaborates M[1‐R‐2‐H2N‐closo‐CB11H10] (R=H, Ph, H2N, CyHN)

“…[21] Its derivatives have emerged as widely used starting materials for the preparation of boron-rich compounds. [6,8,22] They have been applied for the preparation of ionic liquids with [R 3 N-closo-B 12 H 11 ] À ions (R = alkyl), [23] as building blocks in ionomers, [24] for compounds with nonlinear optical (NLO) properties, [25] as weakly coordinating anions [R 3 N-closo-B 12 F 11 ] À (R = H, alkyl), [26] as ligands in transition-metal chemistry, for example in [RuCOA C H T U N G T R E N N U N G (PPh 3 ) 2 (H 2 N-closo-B 12 H 11 )], [27] and for pharmaceuticals, [6,28] for example, for boron neutron capture therapy (BNCT). [29] Exhaustive treatment of [closo-B 12 H 12 ] 2À with H 2 NSO 3 H resulted in double substitution giving (H 3 N) 2 -closo-B 12 H 10 .…”

Silver and Copper Complexes with closo-Polyhedral Borane, Carborane and Metallacarborane Anions: Synthesis and X-ray Structure

“…The closo-dodecaborate anion [B12H12] 2− is the most studied representative of the closo-borane family [51]. The [B12H12] 2− anion has close to sphere icosahedral structure that causes decrease of its coordination ability.…”

Thermal Decomposition of Anhydrous Alkali Metal Dodecaborates M2B12H12 (M = Li, Na, K)

“…Systematic investigation on the thermal decomposition of M 2/n B 12 H 12 is therefore of great importance to understand their role in the dehydrogenation of M(BH 4 ) n . M 2/n B 12 H 12 is generally synthesized using liquid phase reactions, followed by careful dehydration processes [25]. However, in some M 2/n B 12 H 12 such as MgB 12 H 12 , the coordination water tends to form a hydrogen bond with the polyatomic anion [B 12 H 12 ] 2´, resulting in the failure of dehydration [26].…”