Properties of the C,C′-dimethylpentahydro-4,5-dicarba-nido-hexaborate-(1–) ion, C₂Me₂B₄H₅^–, and its reactions with halogen species

Hexaethyl-2,4-dicarba-nido-hexaborane(8), Deprotonation and Complexation Studied by NMR Spectroscopy and Density Functional Theory (DFT) Calculations

“…The chemistry of these carboranes deals mainly with the anions [2,3-R 2 C 2 -B 4 H 5 ] − and [2,3-R 2 C 2 -B 4 H 4 ] 2− [3,4], which are both versatile ligands in the coordination chemistry of s, p, d, and f block elements [5,6], as one would expect considering the similarity of the open face of the anions with the cyclopentadienyl anion. In contrast, the isomeric parent carborane with non-adjacent carbon atoms, the 2,4-dicarba-nido-hexaborane(8), is still unknown, although the parent 2,4-dicarba-nido-hexaborate(1 − ) [2,4-C 2 B 4 H 7 ] − has been identified in mixtures by NMR spectroscopy [7].…”