Dimethylborane, (CH3)2BH is the simplest dialkylborane, consisting of a methyl group substituted for a hydrogen in borane. As for other boranes it normally exists in the form of a dimer called tetramethyldiborane or TMDB (CH3)2BH)2. Other combinations of methylation occur on diborane, including monomethyldiborane, trimethyldiborane, 1,2-dimethylborane, 1,1-dimethylborane and trimethylborane. At room temperature the substance is at equilibrium between these forms. The methylboranes were first prepared by H. I. Schlesinger and A. O. Walker in the 1930s.

CAS：21482-59-7
中文别名：
英文别名：Tetramethyldiboran;TETRAMETHYLDIBORANE;Diborane(6), tetramethyl-;
分子式：C4H12B2
分子量：81.7601
精确质量：82.1125
Psa：0.0
Logp：1.5736

危险品运输编码：UN 1953
危险类别：2.3