期刊
POLYHEDRON
卷 64, 期 -, 页码 365-370出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.poly.2013.06.038
关键词
Metal coordination; 8-Hydroxyquinoline; Bipyridine; 2-(2 '-Pyridyl)-8-hydroxyquinoline; Tridentate ligand; Copper complex; Cobalt complex; Nickel complex
The complexes of cobalt, copper and nickel ions with the known tridentate ligand 2-(2'-pyridyl)-8-hydroxyquinoline (HQP) were prepared and characterized. The structures of the complexes with Co(II), Cu(II) and Ni(III) were corroborated by crystal structure analyses. The structures of the complexes with Co(III) and Cu(I) were realized from NMR measurements in solution. It was found that HQP stabilizes high oxidation states of the complexed metal ions. The results also suggest that HQP binds Cu(II) and Cu(I) in two different modes; Cu(II) forms an octahedral complex with the three elements of the ligand, namely, the 8-hydroxyl the two nitrogens of bipyridine, while Cu(I) binds only to two nitrogens of the bipyridine, yielding a tetra-coordinated complex. (C) 2013 Elsevier Ltd. All rights reserved.
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