Schmidt Uwe, Fantuzzi Felipe, Arrowsmith Merle, Hermann Alexander, Prieschl Dominic, Rempel Anna, Engels Bernd, Braunschweig Holger
Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany.
Institute for Physical and Theoretical Chemistry, Julius-Maximilians-Universität Würzburg, Emil-Fischer-Straße 42, 97074 Würzburg, Germany.
Chem Commun (Camb). 2020 Nov 26;56(94):14809-14812. doi: 10.1039/d0cc06398c.
Whereas the reduction of N-heterocyclic carbene (NHC)-stabilised cymantrenyldibromoboranes, (NHC)BBr2Cym, in benzene results in the formation of the corresponding diborenes (NHC)2B2Cym2, a change of solvent to THF yields a borylene analogue of the form (NHC)2BCym, stabilised through a boratafulvene/borafulvenium conformation.
虽然在苯中还原N-杂环卡宾（NHC）稳定的环戊二烯基二溴硼烷（NHC）BBr₂Cym会生成相应的二硼烯（NHC）₂B₂Cym₂，但将溶剂换成四氢呋喃（THF）会得到一种形式为（NHC）₂BCym的硼烯类似物，它通过硼杂富烯/硼富烯鎓构象得以稳定。
