[Co(L)(NO_3)_2]·CH_3CN的合成和晶体结构

Synthesis and Crystal Structure of [Co(L)(NO_3)_2]·CH_3CN

多吡啶配体2,3二(2吡啶基)5,8二甲氧基喹喔啉(L)与Co(NO3)2.6H2O反应生成配合物[Co(L)(NO3)2].CH3CN,通过单晶衍射分析确证其结构.配合物的单晶结构中,Co(Ⅱ)离子中心分别与配体L的2个吡啶环中的N原子和2个硝基的4个氧原子形成六配位的八面体配位结构,L以双齿配体形式参与配位.配合物通过ππ芳香体系堆积形成一维链状结构,芳香体系的面面叠加作用可能使配合物的结构更加稳定.

The complex of Co（ Ⅱ ） with a new polypyridyl ligand, 2, 3-bis （2-pyridyl）-5, 8- dimethoxyquinoxaline（L）, have been synthesized and characterized. The crystal structure of title compound has been elucidated by X-ray diffraction analyses. In [ Co（L）（NO3）2 ]· CH3CN, the Co（ Ⅱ ） center is coordinated to the two nitrogen atoms of the two pyridine rings of L which acts as a bidentate ligand. The formation of infinite quasi-one-dimensional chains assisted by the intermolecular face-to-face aryl stacking interac- tions may have stabilized the crystals of the complex.