Eight coordinate 1,2-bis(dimethylarsino) and 1,2-bis(dimethylphosphino)-benzene complexes of uranium tetrachloride, UCl4[(1,2-Me2E)2C6H4]2 where E is As or P
作者:Sergio S. Rozenel、Peter G. Edwards、Mark A. Petrie、Richard A. Andersen
DOI:10.1016/j.poly.2016.04.024
日期:2016.9
uranium crystallize in the tetragonal crystal system in space group I 4 ¯ 2m, in which the geometry is a D2d-dodecahedron. In solution the uranium complexes do not exchange with added free ligand on the NMR time scale but they undergo bidentate ligand exchange on the chemical time scale. The 31P1H} NMR chemical shifts of UI4(diphos)2 and UX4(dmpe)2, X = Cl, Br, I range from 1500 to 2100 ppm and are strongly
摘要制备并表征了1,2-双(二甲基亚砷基)苯,MCl4(diars)2(其中M为Th或U)和1,2-双(二甲基膦基)苯,UCl4(diphos)2的八个配位化合物。铀的两个配位配合物在I 4×2m空间群的四方晶系中结晶,其中几何形状为D2d-十二面体。在溶液中,铀络合物在NMR时标上不与添加的游离配体交换,但在化学时标上进行二齿配体交换。UI4(diphos)2和UX4(dmpe)2的31P 1H} NMR化学位移,X = Cl,Br,I为1500至2100 ppm,并强烈依赖于温度。