Studies on the Properties of Schiff Base Type of Aryl mercury Compounds( Ⅰ )——~1H NMR Spectra of Some Schiff Base Type Aryl mercury Compounds and Substituted Benzyl ideneanilines |
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作者单位: | WU Yang-jie,DING Kui-ling and YU Zheng-yan (Department of Chemistry,Zhengzhou University,Zhengzhou,450052)WU Dong-hui and SHEN Lian-fang(Laboratory of Magnetic Resonance and Atomic and Molecular Physics,Wuhan Institute of Physics,Chinese Academy of Sciences,Wuhan,430070) |
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摘 要: | 1H NMR spectra of 16 Schiff base type of arylmercury compounds and 4 -substituted benzylideneanilines have been studied. It was found that the p-substituents of the N-phenyl ring do not affect the δ values of methine proton, whereas the o-substitutents influence the δ values of methine proton, whereas the o-substituents influence the δ values of methine proton significantly. These changes can be reasonably interpreted in terms of the steric inhibition of o-substituents and intramolecular coordination of imino nitrogen with mercury. The influence of the m-or p-substituent of the C-phenyl ring on the δ values of methine proton exhibited a linear correlation with Hammett constants σp or σm. It was also confirmed that in the molecules of Schiff base type of arylmercury compounds there exists an intramolecular coordination via a four-membered ring.
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关 键 词: | 1H NMR Arylmercurial Substituent effect N→Hg intramolecular co-ordination |
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