π-cyclohexadienone derivatives of rhodium(I) acetylacetonate. Crystal and molecular structure of rhodium (η4-4-methyl-4-exo-trichloromethyl-2,5-cyclohexadiene-1-one)(pentane-O,O′-2,4-dionate)
作者:V.A Nikanorov、V.I Rozenberg、A.I Yanovsky、Yu.T Struchkov、O.A Reutov、B.I Ginzburg、V.V Kaverin、V.P Yur'ev
DOI:10.1016/s0022-328x(00)98960-5
日期:1986.7
endo-configuration are formed. Reaction with the ligand (XIII) is stereospecific and results in the formation of a complex with only exo-configuration, whose crystal and molecular structure have been determined by an X-ray structural study. The crystals are monoclinic with space group P21/c, a 7.673(3), b 10.794(4), c 18.38(1) Å, β 100.89(4)°, Z = 4. Stereospecificity of the ligand exchange reaction is evidently
通过Rh(acac)(C 2 H 4)2(VII)与对-半醌环己二酮配体(4,4-二甲基-(VI),4-甲基-4-正丁基-(( IX),4-甲基-4-二氯甲基-(X),4-甲基-4-三氯甲基-(XIII)-环己二烯-2,5-ones-1)Rh(acac)(η已获得4-二烯酮),并通过1 H NMR和IR光谱进行了表征。在与配体IX和X的反应中,形成具有外-和内-构型的非对映体复合物的混合物()。与配体(XIII)的反应具有立体特异性,导致仅与exo形成络合物-构型,其晶体和分子结构已经通过X射线结构研究确定。晶体为单斜晶,空间群为P 2 1 / c,a为7.673(3),b为10.794(4),c为18.38(1)Å,β为100.89(4)°,Z = 4。显然由于来自所述空间较少拥挤的金属原子攻击的优选方向外-site的semiquinoid配体。