The DNMR study of tautomerization of cis-and trans-butenedioic acid
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The DNMR study of tautomerization of cis-and trans-butenedioic acid
Nuclear TechniquesVol. 12, Issue 6, (1989)
作者机构:
中国科学院上海原子核研究所
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Received:11 November 1987,
Published:1989-06
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Keming Zhan, Jianming Yuan, Xiaoma Jiang. The DNMR study of tautomerization of cis-and trans-butenedioic acid[J]. Nuclear techniques, 1989, 12(6): 345-347.
DOI:
Keming Zhan, Jianming Yuan, Xiaoma Jiang. The DNMR study of tautomerization of cis-and trans-butenedioic acid[J]. Nuclear techniques, 1989, 12(6): 345-347.DOI:
The DNMR study of tautomerization of cis-and trans-butenedioic acid
cis-butenedioic acid differs from the trans-isomer in singlet peaks. The difference between their chemical shifts reaches to 0.42 ppm. With the help of dynamic NMR (DNMR)
the photochemical isomerization of trans- and cis-butenedioic acid under irradiation of 253.7 nm ultra-violet rays and the thermal isomerization of maleic acid at 138℃ are described.