Acta Chimica Sinica ›› 1999, Vol. 57 ›› Issue (6): 616-621. Previous Articles     Next Articles

Original Articles

配合物Zn(II)-BPHA的^1H NMR谱

刘国正;刘飞;王翌善;缪增星;方吉东   

  1. 中国原子能科学研究院同位素所
  • 出版日期:1999-06-15 发布日期:1999-06-15

^1H NMR spectra of complex Zn(II)-BPHA

Liu Guozheng;Liu Fei;Wang Yishan;Miao Zengxing;Fang Jidong   

  • Online:1999-06-15 Published:1999-06-15

The ^1H NMR spectra of BPHA and Zn(II)-BPHA have been determined in the pD range 0.8-12.4. In contrast to DTPA and TTHA, the chemical shifts of the methylene protons a in the terminal carboxymethyl groups and b in the middle carboxymethyl groups of BPHA change alternatively with the increasing pD value. For Zn(II)-BPHA, there are three kinds of ^H NMR spectra. In the range pD<6, there exists a sharp peak characteristic of a free NH^+(CH~2COO^-)~2 moiety. From 6 to 9, no sharp single peak exists indicating all nitrogen atoms are coordinated; After pD>9, a sharp single peak appears at 3.14 indicating that an iminodiacetate group is again free except the nitrogen is not protonized.

Key words: ZINC COMPLEX, PROTON MAGNETIC RESONANCE SPECTROMETRY, PROPANEDIAMINE P, ACETIC ACID P

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