A Versatile Approach to the Intramolecular Organization of Two Bipyridine-Like Chelating Units in a Polytopic Ligand
作者:Larissa Kovbasyuk、Markus Hoppe、Hans Pritzkow、Roland Krämer
DOI:10.1002/1099-0682(200105)2001:5<1353::aid-ejic1353>3.0.co;2-c
日期:2001.5
The synthesis of four novel polypyridyl ligands, in which two 4,6-[bis(2-pyridyl)]pyrimidine units are covalently linked by spacer groups −S− (1), −S−S− (2), −Se− (7), and −Se−Se− (6), is reported. A new unsymmetrical dinucleating ligand 4 was isolated as a by-product in the synthesis of 2 and has been characterized by X-ray crystallography. Copper(II) complexes [(1)Cu](NO3)2·5H2O and [(7)Cu](ClO4)2·6H2O
四种新型多吡啶基配体的合成,其中两个 4,6-[双(2-吡啶基)]嘧啶单元通过间隔基团共价连接 -S- (1), -S-S- (2), -Se- (7) 和 -Se-Se- (6) 被报道。一种新的不对称双核配体 4 作为 2 合成的副产物被分离出来,并已通过 X 射线晶体学表征。铜(II) 配合物[(1)Cu](NO3)2·5H2O 和[(7)Cu](ClO4)2·6H2O 已被分离,其光谱数据与配体的四齿N4 配位一致。原位制备的 1 和 7 的多核铜 (II) 配合物在磷酸二酯 2-羟丙基对硝基苯基磷酸酯的裂解中显示出不同的催化活性。这可能是由于共价间隔基(S 或 Se)对 [LCu]2+ 中两个类联吡啶螯合单元的预组织的影响,