硼化合物研究——ⅩⅩⅪ.[C_5H_5Fe(CO)_2PPh_3]B_(11)H_(14)的合成及其性质

STUDIES ON BORON COMPOUNDS ⅩⅩⅪ.Synthesis and properties of eyelopentadienyl-diearbonyl-triphenylphosphineiron tetradeeahydroundecaborate

通过环戊二烯基-二羰基-三苯基膦合铁的氯化物(1)与十四氢十一硼烷阴离子反应,得到新的环戊二烯基-二羰基一三苯基膦合铁的十四氢十一硼烷化合物(Ⅱ).用元素分析、红外和紫外光谱、~1H 和^(11)B 核磁共振谱以及摩尔电导率等表征了Ⅱ.^(11)B NMR 的数据表明Ⅱ中存在着三组不同的硼原子。

Quaternary monobenzylammonium tetrahydroborate (1-) on thermolysis readily eliminates a benzyl group according to the general equation: R^1R^2R^3N+CH_2PhBH_4^-→R^1R^2R^3N·BH_3+PhCH_3 and forms tertiaryamine borane, no evidence was obtained for B_(10)H_(10)^(2-) or B_(12)H_(12)^(2-). The process of debenyylation may be conveniently employed for the prepa-ation of triethylamine borane、tri-n-propylamine borane、tri-n-butylamine borane、N, N-diethyl-n-butylamine borane、N,N-diethyl-n-hexylamine borane、N,N-dimethyl aniline borane and N-ethylpiperidine borane, in yield of 85%、75%、92%、63%、64%、80% and 61% respectively. Seven corresponding quaternary monobenzylammonium tetrahydroborate (1-) were conveniently prepared by metathesis in 5N NaOH/CH_2Cl_2 according to the general equation: R^1R^2R^3N^+CH_2 PhCl^-+KBH_4→R^1R^2R^3N^+CH_2PhBH_4^-+KCl