Synthesis of copper(II) and nickel(II) complexes of N-(hydroxyalkylaminoalkyl)salicylamides |
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Authors: | Kiyoko Nonoyama Heijiro Ojima Matsuo Nonoyama |
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Institution: | 1. Hayashi Junior College, Ryotakaya, Konan, Aichi, 483 Japan;2. Department of Chemistry, Aichi Kyoiku University, Igaya, Kariya, Aichi, 448 Japan;3. Department of Chemistry, Faculty of Science, Nagoya University, Chikusa, Nagoya, 464, Japan |
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Abstract: | Copper(II) and nickel(II) complexes are prepared of potentially quadridentate ligands (LH3), N-{2-(2- hydroxyethylamino)ethyl}- (seeH3), N-{3-(2-hydroxy- ethylamino)propyl}- (steH3), and N-{2-(3-hydroxypropylamino)ethyl}-salicylamide (setH3). The nickel complexes NaNi(see)] and NaNi(set)]·1/2H2O are diamagnetic and square-planar, in which the ligands act as a quadridentate one coordinated through secondary amino-N, and deprotonated phenolic-O, alcoholic-O, and amido-N atoms. The three copper complexes Na CuL]·H2O (L = see, ste, set) with a normal magnetic moment have a similar square-planar structure. In another type complexes Cu(LH)·H2O (LH = seeH, setH) an alcohol group is not deprotonated. Two isomers are present in Cu(seeH)·H2O: one has a normal and the other a subnormal magnetic moment. The difficulty of complex formation of steH3 may be attributed to an unfavourably fused 6-6-5 membered chelate ring with strain. |
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