Unusual, thermally stable, sublimable aminoboranes B(NHAr)X2(X = Cl, F, or NH2); X-ray crystal structure of bis(amino)(2,4,6-tri-t-butylphenylamino)borane, B(NH2)2(NHAr)
作者:Peter B. Hitchcock、Hatam A. Jasim、Micheal F. Lappert、Hugh D. Williams
DOI:10.1039/c39840000662
日期:——
6-tri-t-butylamido lignad (HAr) confers unexpected thermal stability on the title boranes B(NHAr)X2[X = Cl, (2); F,(3); or NH2, (4)], each of which is sublimable without elimination of HX; the difluoroborane (3) has significant BN double-bond character as is evident from magnetically distinct F– ligands, only one of which (presumably the trans) is coupled to the NHAr proton; compound (4) has trigonal planar
对空间要求高的2,4,6-三叔丁基酰胺基利纳德(HAr)为标题硼烷B(NHAr)X 2 [X = Cl,(2);提供了意想不到的热稳定性。F,(3);或NH 2,(4)],它们在不消除HX的情况下是可升华的;所述difluoroborane(3)具有显著BN双键字符如从磁不同˚F明显-配体,其中只有一个(大概是反式)被耦合到所述N个ħ氩质子; 化合物(4)具有三角形平面硼和B–NH 2之一 键明显比另一个的1.470(4)和1.437(4)Å滞后,并且比B–NHAr的1.412(4)Å长。