TRIS(2,6-DIMETHOXYPHENYL)BORANE AND ITS ADDUCTS

Tris(2,6-dimethoxyphenyl)borane, Phi(3)B (Phi = 2,6-(MeO)(2)C6H3), an air-stable crystalline compound, formed isolable 1:1 adducts with ammo nia and some primary amines but not with tertiary amines, secondary am ines, or sec-alkylamines. Some tetraalkylammonium tris(2,6-dimethoxyph enyl)cyanoborates [R,N][Phi(3)B-CN] are soluble both in water and in b enzene, and the stearyltrimethylammonium salt is soluble even in n-hex ane. The freezing point depression measurements for some tetraalkylamm onium salts suggested that they are associated in benzene by several m olecules.