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    Title: Proton magnetic resonance studies of heterocyclic aromatic amine adducts of nickel(II) and cobalt(II) acetylacetonate
    Authors: 王文竹;Wang, Wen-jwu;Wei, Ho-hsiang;魏和祥
    Contributors: 淡江大學化學學系
    Date: 1978-12-01
    Issue Date: 2013-07-29 13:44:21 (UTC+8)
    Publisher: 臺北市:中國化學學會
    Abstract: The proton nmr isotropic shifts of pyridine type ligands coordinated to paramagnetic nickel(II) and cobalt(II) acetylacetonate are reported, and the mechanisms of unpaired electron spin delocalization in these complexes are discussed. It is found that a σ-delocalization mechanism is in dominant, but the π-contribution can not be rule out. The calculations of the geometric factor for Co(II) complexes are done. It is used in the ratio method to separate the contribution of pseudo-contact shift from isotropic shift for Co(II) complexes. The effect of pseudoaromatic chelate ring on contact shift is not so large as previous reported.
    Relation: 中國化學會會誌=Journal of the Chinese Chemical Society 25(4),頁185-194
    DOI: 10.1002/jccs.197800031
    Appears in Collections:[化學學系暨研究所] 期刊論文

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