Syntheses and Characterizations of Linear Triborazanes

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• 作者：William C. Ewing ; Patrick J. Carroll ; Larry G. Sneddon
• 刊名：Inorganic Chemistry
• 出版年：2013
• 出版时间：September 16, 2013
• 年：2013
• 卷：52
• 期：18
• 页码：10690-10697
• 全文大小：375K
• 年卷期：v.52,no.18(September 16, 2013)
• ISSN：1520-510X

文摘

Reaction of the amine boranes NH₂(R)BH₃, where R = H, Me, and Bz, with ¹/₃ equiv of sodium hexamethyldisilazane produced the five-membered, linear aminoborane anions Na⁺[BH₃N(R)HBH₂N(R)HBH₃^{鈥?/sup>], where R = H (1), Me (1Me), and benzyl (1Bz). Reactions of 1 and 1Me with ammonium chloride and methylammonium chloride, respectively, resulted in elimination of NaCl and H₂ to produce the linear triborazanes BH₃(RNHBH₂)₂N(R)H₂, where R = H (2) and Me (2Me), with the structure of 2 crystallographically confirmed. The reactions of 1 and 1Me with pyridine鈥揌Cl produced the pyridine-capped aminoboranes H₃B(RNHBH₂)₂(NC₅H₅), where R = H (3) and Me (3Me). 2 and 2Me proved to be stable up to 90 掳C but produced a mixture of products when heated above 90 掳C. 2 was selectively monochlorinated at the terminal boron when treated with 1 equiv of HCl and dichlorinated when reacted with a second 1 equiv of HCl.}