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On the 1H NMR chemical shift assignments for ampicillin

✍ Scribed by Janet C. Tung; Angelo J. Gonzales; Jack D. Sadowsky; Daniel J. O’Leary

Publisher
John Wiley and Sons
Year
2000
Tongue
English
Weight
58 KB
Volume
38
Category
Article
ISSN
0749-1581

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✦ Synopsis

The 1 H 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-˛and Me-ˇchemical 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.

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