Trimethylamine-haloboranes

Submitted by G. E. RYSCHK EWITSCH and J. W. WIGGINS Cheeked by R. L. SNEATHf and L. J. TODDf 

Trimethylamine-borane of good purity is commercially available or may be prepared on a large scale from NaBH4.8i (See Sec. 19C.) It may be easily purified by vacuum sublimation. Solvents may be dried over calcium hydride or molecular sieves. Caution. All syntheses should he carried out in a 

J Trimethylamine-borane is commercially available from Callery Chemical Company, Callery, Pa. 

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CHj)3NBH2I has been prepared by N6th through the action of hydrogen iodide or iodine on trimethylamine-borane.4 Unlike the other haloboranes, the compound reacts very readily with water and must therefore be synthesized with due precautions for the exclusion of atmospheric moisture. For some purposes it may be unnecessary to isolate the pure material. In this case the solution prepared in the first step of the synthesis below may be used directly. 

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