高等学校化学学报

高等学校化学学报 ›› 1991, Vol. 12 ›› Issue (4): 431.

• 论文 • 上一篇    下一篇

辅酶B12模型化合物的研究(Ⅲ)--一类新型烷基钴Schiff碱配合物的合成及Co-C键稳定性

陈慧兰, 陈冠菁, 缪炳文, 唐雯霞   

  1. 南京大学化学系、配位化学研究所, 210008
  • 收稿日期:1989-09-05 出版日期:1991-04-24 发布日期:1991-04-24
  • 通讯作者: 陈慧兰
  • 基金资助:

    国家自然科学基金;南京大学分析中心测试基金

Studies on Coenzyme B12Model Compounds (Ⅲ)--The Synthesis of a Kind of New Alkylcobalt Schiff Base Complexes and Their Stabilities of the Co-C Bond

Chen Hui-lan, Chen Guan-qing, Miao Bing-wen, Tang Wen-xia   

  1. Department of Chemistry, Institute of Coordination Chemistry, Nanjing University, Nanjing, 210008
  • Received:1989-09-05 Online:1991-04-24 Published:1991-04-24

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摘要： 合成与表征了一系列烷基钻Schiff碱配合物RCo(SB)L(R为甲,乙,丙,正丁和异丁基;L为水;SB为双水杨醛缩二甲基丁二胺),它们是一类尚未见报道的新的辅酶B12模型化合物。该配合物的溶液很不稳定,加热或光照促使Co-C键断裂,轴向烷基和平伏面配体对Co-C键稳定性均有影响。经紫外、可见分光光度法及自旋捕集ESR法确定了热分解和光分解反应的产物和超精细分裂常数。

关键词: 辅酶B12模型化合物, Co-C键, 烷基钴配合物, Schiff碱, 自旋捕集

Abstract: In this paper a series of alkylcobalt complexes RCo(SB)Lin which R=CH3, C2H5, C3H7, n and i-C4H9); L=H2O; SB=bissalicylaldehyde 2,3-dimethyl-2,3-butadiamine, a kind of new coen-zyme B12model compounds, were synthesized and characterized.The complexes are unstable in methanol. Their Co-C bond breaked in the process of thermolysis or photolysis, the products of which were established by using UV-Vis spectrophotometry and spin trapping ESRtechnology. Also the splitting constants were quantitatively determined. It was concluded that both axial alkyl and equatorial ligand influence the stabilities of Co-Cbond.

Key words: Coenzyme B12model compounds, Co-C Bond, Alkylcobalt complexes, Schiff base, Spin trapping

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