Structure of caesium 3,3'-commo-bis(decahydro-8-iodo-1,2-dicarba-3-cobalta-closo-dodecaborate)(1-)

Fast flip–flop of halogenated cobalt bis(dicarbollide) anion in a lipid bilayer membrane

“…Introduction of the halogen atoms X opposite to the carbons position of the pentagonal face of the dicarbollide ligand results in the additional stabilization of the transoid conformation due to formation of the intramolecular hydrogen C-HÁ Á ÁX-B bonds between the dicarbollide ligands. The introduction leads to exclusively transoid conformation for X = Br 33 and X = I, 34,35 and preferential transoid (80%, gauche 20%) conformations for X = Cl [36][37][38][39] in the solid state. However in the case of X = F (COSAN-F 2 ), the C-HÁ Á ÁF-B distances are too long to form the intramolecular hydrogen bonds resulting in the domination of the cisoid conformation in a solid state.…”

Methylsulfanyl‐Stabilized Rotamers of Cobalt Bis(dicarbollide)

“…In particular, such stabilization can be achieved through the introduction of substituents that can form intramolecular hydrogen bonds between the dicarbollide ligands. The effective stabilization of the transoid conformation through the formation of intramolecular C carb H ··· XB (X = Cl, Br, I) hydrogen bonds between the ligands can be achieved by the introduction of halogen atoms at the 8‐ and 8′‐positions of the metallacarborane skeleton …”

Tetrathiafulvalene-based radical cation salts with transition metal bis(dicarbollide) anions

“…Thus, for example, the maximum width and length of the 8,8′-diiodo cobalt bisIJdicarbollide) anion ij8,8′-I 2 -3,3′-CoIJ1,2-C 2 B 9 H 10 ) 2 ] − are approx. 7.5 and 10.2 Å, 28 respectively, whereas the width and length of the 10,10′-diiodo cobalt bisIJdicarbollide) anion ij10,10′-I 2 -3,3′-CoIJ1,2-C 2 B 9 H 10 ) 2 ] − are 12.1 and 4.6 Å, 26 respectively.…”