1. in : Boron Hydride Chemistry, Academic Press, New York 1975.
2. Boron-fluorine chemistry. II. Reaction of boron monofluoride with acetylenes
3. Classical configurations associated with nonclassical molecules: three carboranes as examples
4. Procedure: 2: A solution of Me3Si- NMe2 (7.9 g, 67.5 mmol) in pentane (35 mL) is added dropwise to a solution of (Cl2B)2CH2 [5] (6.0 g, 33.8 mmol) in pentane (35 mL). The mixture is heated under reflux for 2.5 h and then distilled at 25°C/0.01 torr. 1 is obtained in 84% yield (5.5 g). A solution of 1 (4.0 g, 20.6 mmol) in pentane (40 mL) is added to the Na/K alloy prepared from 1.44 g (37 mmol) K and 0.1 g (4.3 mmol) Na. During the ensuing reaction the mixture turns blue. After three days' stirring at 20°C the mixture is filtered. Distillation of the filtrate at 65°C/0.01 torr affords 2, which is recrystallized from CH2Cl2 (0.73 g, 29%; m.p. 144°C, decomp.).
5. Tris(dichloroboryl)methane, bis(dichlororyl)methane, and a possible new route to carbonarnes