A Hypervalent Pentacoordinate Boron Compound with an N−B−N Three-Center Four-Electron Bond
作者:Yuichi Hirano、Satoshi Kojima、Yohsuke Yamamoto
DOI:10.1021/jo1024656
日期:2011.4.1
characterizing hypervalent boron compounds with strong hypervalent interaction, we have prepared a boron compound with a tridentate ligand bearing two pyrimidine rings as nitrogen donors. X-ray analysis and molecular orbital calculations suggested that the boron compound was of hypervalent pentacoordinate structure with an N−B−N hypervalent bond. Thus, we have prepared the first hypervalent second row
为了合成和表征具有强高价相互作用的高价硼化合物,我们制备了带有带有两个嘧啶环的三齿配体作为氮供体的硼化合物。X射线分析和分子轨道计算表明,该硼化合物为具有NB-N超价键的超价五配位结构。因此,我们制备了具有顶点N配位的第一超价第二行元素化合物。通过DFT计算的能量贡献的分解显示,五配位基态(13)的N-B-N键能为2.8kcal mol -1。这意味着共轭能差为6.6 kcal mol -1(14.2-7.6 kcal mol -1)的四坐标状态是将稳定性移向五坐标结构的关键因素。