r,r′-联吡啶桥联Cu,Rh配合物的合成、晶体结构和ESR谱

Synthesis, Molecular Structure and ESR Spectra of r,r'-Bipyridyl Bridged Cu-Rh Complex

合成了r,r’-联吡啶为桥的异双核配合物[(H_2O)Cu(dien)(μ-r,r’-bpy)Rh(NH_3)_5](ClO_4)_5·H_2O.研究了单晶结构和ESR谱.晶体属正交晶系,空间群Pbca,晶胞参数:a=14.425(1),b=29.589(2),c=16.893(6)A,Z=8.偏离因子R=0.065.分子中Cu^(2+)和Rh^(3+)分别取五配位的四方锥和六配位的八面体构型,联吡啶桥的2个吡啶面夹角为51°.依据ESR谱计算了3配合物中Cu^(2+)的键参数并讨论了Cu^(2+)的成键性质.

The systhesis, characterization and molecular structure of [(dien)Cu(H2O) (β-r,r' -bpy) Rh(NH3)5](ClO4)5 . H2O were studied. The title compound crystallized in space group Pbca, with unit cell constants, a = 14.425(1) A,b=29. 589(2) A,c=16. 893(6) A ,a=β=r=90°,Z=8. R= 0. 065. In the molecule Cu2+and Rh3+are separately in square-pyramidal and octahedral configurations, bridged by r,r' -bipyridyl. The angle of two planes of pyridines in r,r' -bipyridyl of title compound is about 51°, more than that of r,r' -bipyridyls in other compounds. From obtained ESR spectra the bond parameters of Cu2+ in the title compound were calculated and bonding characters of the compound were discussed.