Synthesis of σ-(o-carboran-9-yl)- and σ-(m-carboran-9-yl)-π-cyclopentadienyldicarbonyliron and their rearrangement in reactions with bromine to π-(o-carboran-9-yl)cyclopentadienyl- and π-(m-carboran-9-yl)cyclopentadienyl-dicarbonylironbromides, respectively

Syntheses and Crystal Structures of 9-Acetyl- and 9-Cyano-1,2-dicarbadodecaborane: Supramolecular Association in Carboranyl C−H Hydrogen-Bonded α-Networks

“…Compounds 4 , 5 , 6 , and 7 , were prepared by literature methods. Melting points were determined in sealed capillaries on a Thomas-Hoover Unimelt apparatus and are uncorrected.…”

“…The mixture was stirred at 10−15 °C for 1 h and heated at 60−65 °C for 2 h. After cooling to room temperature, the mixture was poured into cold water to give an abundant white precipitate. The crystals were filtered off and recrystallized from methanol to give pure 7 (1.71 g, 9.1 mmol, 78%), mp 238−240 °C (lit . 239−240 °C).…”

Site‐Selective Functionalization of Carboranes at the Electron‐Rich Boron Vertex: Photocatalytic B−C Coupling via a Carboranyl Cage Radical

“…9-meta-Carborane carboxylic acid (1 a) was chosen as a model substrate, which was synthesized by improved literature procedures (see the Experimental Section in the Supporting Information). [15] Upon addition of 1 a to a solution of the photocatalyst Ir[dF(CF 3 )ppy] 2 (dtbbpy)PF 6 , no obvious emission intensity change was observed (Figure S4 in Supporting Information). But, when 1 a was replaced by potassium 9-meta-carborane carbonate (1 b), significant emission attenuation could be seen (Figures 1a and S3).…”

Four Decades of Organic Chemistry of closo-Boranes: A Synthetic Toolbox for Constructing Liquid Crystal Materials. A Review

“…Carboranes are relatively resistant to acids and some strong oxidizing reagents and many standard chemical transformations of the side chains and aromatic rings can be accomplished without affecting the carborane ring. It has been found that B-alkyl, -allyl, and -vinyl groups undergo oxidative degradation to form B-COOH acids in high yields 48,49,172,195 . Functionalization of aromatic rings of arylcarboranes have been accomplished by acylation 196 , halogenation 196 , nitration 47,60,123,170,[196][197][198] ,…”