Peculiarities of coordination of silaoxaphenanthrene with the tricarbonylchromium group. Cyrstal and molecular structure of tricarbonyl[1-4a(10a)-η-10,10- dimethyl-10-sila-9-oxa-9,10-dihydrophenanthrene]chromium and tricarbonyl[5-8a(4b)-η-10,10-dimethyl-10-sila-9-oxa-9,10- dihydrophenanthrene]chromium
作者:N.I. Kirillova、A.I. Gusev、V.A. Sharapov、O.B. Afanasova、Yu.E. Zubarev、N.V. Alekseev、E.A. Chernyshev、Yu.T. Struchtov
DOI:10.1016/s0022-328x(00)98933-2
日期:1986.5
in complex II, the oxygen-substituted fragment is coordinated in complex III. In both cases the tricyclic system of the ligand is nonplanar with the dihedral angle between benzene rings being 20.4° in II and 15.5° in III. The chromium atom is displaced from the centre of the coordinated ring in the direction opposite to the ring junction carbon atoms by 0.032 Å in II and 0.064 Å in III. The final R-factors
由10,10-二甲基-10-sila-9-oxa-9,10-二氢菲(I)形成且具有相同组成[ H 4 ] Cr(CO)3的两个三羰基铬配合物的X射线晶体结构分析(II和III)进行。络合物是其中配体的不同芳族片段与Cr原子配位的异构体。硅取代的片段与配合物II中的金属原子相连,氧取代的片段在配合物III中配位。在这两种情况下,配体的三环系统都是非平面的,苯环之间的二面角在II中为20.4°,在III中为15.5°。铬原子在与环连接碳原子相反的方向上从配位环的中心位移了II处为0.032Å,III处为0.064Å。结构II和III的最终R因子分别为0.029和0.027。