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.
来源：
O'Leary, D.J. (doleary@pomona.edu) | 2000年 / John Wiley and Sons Ltd卷 / 38期
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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