Complexes of 2,2′,2″-Nitrilotriphenol. Part 3. Crystal and Molecular Structures of Three Aluminium Complexes
作者:Edgar Müller、Hans-Beat Bürgi
DOI:10.1002/hlca.19870700305
日期:1987.5.6
Crystal and molecular structures of three Al(III) complexes of the tripod ligand 2,2′,2″-nitrilotriphenolate (I) are presented. They all show 5-coordinate Al in approximately trigonal bipyramidal geometry, with an external nucleophile X occupying the second axial position. X is OH− in[Al(I)(OH)]−[Hquin]+ (quin = quinuclidine), N in [Al(I)(py)] (py = pyridine), and one of the O-atoms of a second molecule
介绍了三脚架配体2,2',2''-三氟三酚(I)的三种Al(III)配合物的晶体和分子结构。它们都显示出大约三边形双锥体几何形状的5坐标Al,外部亲核试剂X占据了第二个轴向位置。X是OH - in [Al(I)(OH)] - [Hquin] +(quin =奎尼丁),N是[Al(I)(py)](py =吡啶),且是O原子中的一个二聚体[(Al(I))2 ]中的第二个分子。观察到三角形双锥体的轴向键长相关变化:[(Al(I))2 ]:Al–N int。= 2.094Å,Al–O分机 = 1.850Å; [Al(I)(py)]:Al–N int。= 2.153Å,Al–N分机。,= 1.992Å; [Al(I)(OH)] -:Al–N int。= 2.278Å,Al–O分机。= 1.765Å。它们是根据Al(III)中心的解离反应路径来解释的。