高等学校化学学报 ›› 1993, Vol. 14 ›› Issue (8): 1043.

• 研究论文 • 上一篇    下一篇

溶液中N-乙酸基取代氮氧杂大环的构象及其配合物的NMR研究

姚天明, 孙红哲, 李邨, 游效曾   

  1. 南京大学配位化学国家重点实验室, 南京 210008
  • 收稿日期:1992-10-16 修回日期:1993-01-10 出版日期:1993-08-24 发布日期:1993-08-24
  • 通讯作者: 游效曾
  • 作者简介:第一作者:男, 31岁, 博士研究生.
  • 基金资助:

    国家自然科学基金

NMR Studies on the Conformation of Oxygen-Nitrogen Donor Macro- cycle Containing N-Carboxylmethyl and Its Complexes in Solution

YAO Tian-Ming, SUN Hong-Zhe, LI Cun, YOU Xiao-Zeng   

  1. State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing, 210008
  • Received:1992-10-16 Revised:1993-01-10 Online:1993-08-24 Published:1993-08-24

摘要: 1HNMR方法研究了溶液中大环化合物1,12-二氮杂-3,4:9,10-二本并-5,8-二氧杂环十五烷-N,N'-二乙酸盐的构象.NMR变温实验表明,在溶液中大环与Zn(Ⅱ)、Ni(Ⅱ)、Co(Ⅱ)的配合物环上醚氧不参与配位,其中Ni(Ⅱ)配合物为低自旋反磁性的平面四方形配位.

关键词: 1HNMR, 大环, 配合物, 构象

Abstract: The 1HNMRspectra of 1, 12-diaza-3, 4-: 9, 10-dibenzo-5, 8-dioxacy-clopentadencane-N, N'-diacetic acid (sodium salt) and its complexes in solution are reported.Two sets of three split peaks have been observed in the low temperature NMRspectra of the macrocycle, which is related to the nonequivalence of 1- and 2- protons on the conformation of the macrocyclic ligand.The 1HNMRspectra of the nickel complex is very similar to those of the zinc complex.This can be interpreted as a low-spin, square plannar molecular structure of the nickel complex.For all of the zinc, nickel and cobalt complexes, the ether oxygen atoms in the macrocyclic ligand do not coordinate to the central metal ion.

Key words: 1HNMR, Macrocycle, Complex, Conformation

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