Definitive crystal structure of 1,1'-bis[1,2-dicarba-<i>clos</i>o-dodecaborane(11)]

In the title compound, C4H22B20, the two {1,2-closo-C2B10H11} cages are linked across a centre of inversion with a C—C distance of 1.5339 (11) Å. By careful analysis of the structure, it is established that the non-linking cage C atom is equally disordered over cage vertices 2 and 3

Crystal structure of 1,1'-bis[1,7-dicarba-<i>closo</i>-dodecaborane(11)]

In the title compound, C4H22B20, the two {1,7-closo-C2B10H11} cages are linked across a centre of inversion, with C—C = 1.5401 (16) Å. The position of the second non-linking cage C atom was established unambiguously by geometric and crystallographic methods and there is no evidence of C/B disorder

Steric <i>versus</i> electronic factors in metallacarborane isomerisation: nickelacarboranes with 3,1,2-, 4,1,2- and 2,1,8-NiC₂B₉ architectures and pendant carborane groups, derived from 1,1′-bis(o-carborane)

Nickelacarborane derivatives of 1,1′-bis(o-carborane) allow comment on the factors important in the isomerisation of metallacarboranes.</p

Silver Effect in Regiodivergent Gold-Catalyzed Hydroaminations

We report a silver-induced switching of regioselectivity in gold-catalyzed reactions, and we provide mechanistic evidence to suggest a true “silver effect”: that is, one that is implicated in the catalytic process itself, via σ-gold π-silver acetylides. These results are of significance because they clearly show that the use of silver as halide abstractors in gold-catalyzed reactions may result in “silver effects” when terminal alkyne substrates are involved

Developing nitrosocarborane chemistry

New nitrosocarboranes or their hydroxylamine or Diels–Alder cycloadducts have been prepared and fully characterised.</p

Double deboronation and homometalation of 1,1'-bis(ortho-carborane)

Diastereomeric diruthenium and dicobalt species derived from double deboronation and metalation of 1,1′-bis(ortho-carborane) have been prepared and characterised.</p

Unprecedented flexibility of the 1,1′-bis(o-carborane) ligand:catalytically-active species stabilised by B-agostic B–H⇀Ru interactions

The compound (p-cymene)Ru[(C2B10H10)2], an effective Lewis acid catalyst, is the precursor to a number of products in which the 1,1′-bis(o-carborane) unit displays an unprecedented range of ligating modes.</p