Stereoselective Formation of Seven-Coordinate Titanium(IV) Monomer and Dimer Complexes of Ethylenebis(<i>o</i>-hydroxyphenyl)glycine
作者:Maolin Guo、Hongzhe Sun、Shailja Bihari、John A. Parkinson、Robert O. Gould、Simon Parsons、Peter J. Sadler
DOI:10.1021/ic990669a
日期:2000.1.1
carboxylate O-atoms at 2.061(2) A, and a water molecule (Ti-OH2, 2.091(3) A). Complex 2 crystallizes as an oxygen-bridged dimer in the triclinic space group P-1 with a = 12.521(6) A, b = 14.085(7) A, c = 16.635(8) A, alpha = 80.93(2) degrees beta = 69.23(2) degrees, gamma = 64.33(2) degrees , V = 2472(2) A3, Z = 4, and R(F) = 0.0580 for 5956 independent reflections having I > 2sigma(I). Each seven-coordinate
在水溶液和固态下,研究了抗肿瘤药二茂钛二氯化物(Cp2TiCl2)和六齿配体N,N'-亚乙基双-(邻-羟基苯基甘氨酸)(H4ehpg)之间的反应。外消旋配体产生单体[Ti(ehpg)(H2O)] x(11/3)H2O(1)的晶体,而内消旋配体产生氧桥联二聚体[[Ti(Hehpg)(H2O)] 2O]。 x 13H2O(2)。配合物1在单斜空间群C2 / c中结晶,其中a = 24.149(4)A,b = 14.143(3)A,c = 19.487(3)A,β= 105.371(13)度,V = 6417.7(19)对于I> 2sigma(I)的4,428次独立反射,A3,Z = 12和R(F)= 0.0499,并且包含具有两个轴向酚盐配体的七坐标五角-双锥体TiIV(Ti-O,1.869(2)A) 。五边形平面包含2.210(2)A处的两个N原子,2.061(2)A处的两个羧酸O原子,和水分子(Ti-OH2,2