Competition between different nucleophilic sites belonging to the same Lewis bases. Part I. Aminophosphines towards borane
作者:Claude Jouany、Jean-Pierre Laurent、G�rard Jugie
DOI:10.1039/dt9740001510
日期:——
investigated by means of the chemical behaviour of the borane group and 1H, 11B, and 31P n.m.r. spectra. The phosphorus atom appears to be a better acceptor than nitrogen towards BH3 when these two donor atoms are linked together, such as in Me2NPMe2 and (Me2N)2PMe. However, when these two atoms are separated by a methylene bridge, as in (Et2NCH2)3P, borane co-ordinates with nitrogen rather than with phosphorus
通过硼烷基团的化学行为以及1 H,11 B和31 P nmr光谱研究了氨基膦-硼烷加合物中供体-受体相互作用的性质。当这两个供体原子连接在一起时,例如在Me 2 NPMe 2和(Me 2 N)2 PMe中,磷原子似乎比氮更好地接受BH 3。但是,当这两个原子被亚甲基桥隔开时,如(Et 2 NCH 2)3所示P,硼烷与氮而不是磷配位。该结果在多重键合行为和位阻方面是可解释的。