Structural Analyses of Borane and Chloroborane Adducts of 1,3,5-Dithiaza-, -Dioxaza-, -Thiadiaza-, and -Triazacyclohexanes and Their Rearrangement Products, Boracyclohexanes
作者:Angelina Flores-Parra、Sonia A. Sánchez-Ruíz、Carlos Guadarrama-Pérez
DOI:10.1002/(sici)1099-0682(199911)1999:11<2063::aid-ejic2063>3.0.co;2-a
日期:1999.11
two-dimensional, and variable-temperature NMR spectroscopy of borane and chloroborane adducts of 1,3,5-heterocyclohexanes and their rearrangement products, boracyclohexanes, are reported. N-Methyl derivatives gave equatorial N-borane adducts whereas the N-isopropyl derivatives produced the axial borane compounds. Rearrangement reactions of the adducts gave the first examples of chloroboracyclohexanes bearing
1,3,5-杂环己烷的硼烷和氯硼烷加合物及其重排产物硼环己烷的 1H-、11B-、13C-、二维和变温 NMR 光谱进行了结构和构象研究。N-甲基衍生物产生赤道N-硼烷加合物,而N-异丙基衍生物产生轴向硼烷化合物。加合物的重排反应给出了带有硼和氮原子作为稳定立体中心的氯硼环己烷的第一个例子。发现 BClH2 和 BCl2H 加合物对环重排比相应的 N-BH3 类似物更稳定。