On the 1H NMR chemical shift assignments for ampicillin

被引:0
|
作者
机构
[1] Tung, Janet C.
[2] Gonzales, Angelo J.
[3] Sadowsky, Jack D.
[4] 1,O'Leary, Daniel J.
关键词
Nuclear magnetic resonance spectroscopy;
D O I
10.1002/(SICI)1097-458X(200002)38:23.0.CO;2-W
中图分类号
O56 [分子物理学、原子物理学];
学科分类号
070203 ; 1406 ;
摘要
The 1H NMR spectrum of ampicillin in aqueous solution at pD 8 and 4 was assigned using a combination of 2D T-ROESY and 1D GOESY techniques. The Me-α and Me-β chemical shift assignments, determined at pD 8, are opposite to existing literature values obtained under similar conditions. Additionally, the methyl chemical shifts were found to be strongly pD dependent, with a chemical shift crossover occurring at lower pD. Copyright © 2000 John Wiley & Sons, Ltd.
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