Magnetic properties and molecular structures of binuclear (2-pyrazinecarboxylate)-bridged complexes containing Re(<scp>iv</scp>) and M(<scp>ii</scp>) (M = Co, Ni)
作者:Alicia Cuevas、Carlos Kremer、Markus Hummert、Herbert Schumann、Francesc Lloret、Miguel Julve、Juan Faus
DOI:10.1039/b611888g
日期:——
the mononuclear complex Bu(4)N[ReBr(5)(Hpyzc)] (1) and the heterobimetallic complexes [ReBr(5)(mu-pyzc)M(dmphen)(2)].2CH(3)CN [M = Co (2), Ni (3)] (Hpyzc = 2-pyrazinecarboxylic acid, dmphen = 2,9-dimethyl-1,10-phenanthroline), have been synthesized and their crystal structures determined by single-crystal X-ray diffraction. The structure of 1 consists of [ReBr(5)(Hpyzc)](-) complex anions and tetrabutylammonium
三种新型Re(iv)化合物,单核络合物Bu(4)N [ReBr(5)(Hpyzc)](1)和杂双金属络合物[ReBr(5)(mu-pyzc)M(dmphen)(2)] .2CH(3)CN [M = Co(2),Ni(3)](Hpyzc = 2-吡嗪羧酸,dmphen = 2,9-二甲基-1,10-菲咯啉),并已确定它们的晶体结构通过单晶X射线衍射。1的结构由[ReBr(5)(Hpyzc)](-)络合阴离子和四丁基铵阳离子Bu(4)N(+)组成。Re(iv)在扭曲的八面体环境中被五个溴化物阴离子和一个N供体Hpyzc单齿配体包围。2和3的结构由双核单元[ReBr(5)(mu-pyzc)M(dmphen)(2)]组成,金属离子通过pyzc桥配体连接,对M(II)呈二齿状,向M(II)呈单齿状Re(IV)。Re(IV)的环境与1中相同 而M(II)是六配位的,被两个双齿dmphen配体的四个氮原