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13C and 15N-chemical shift anisotropy of ampicillin and penicillin-V studied by 2D-PASS and CP/MAS NMR

Antzutkin, O N ; Lee, Y K ; Levitt, M H

Journal of magnetic resonance (1997), 1998-11, Vol.135 (1), p.144-155 [Periódico revisado por pares]

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Título:
13C and 15N-chemical shift anisotropy of ampicillin and penicillin-V studied by 2D-PASS and CP/MAS NMR
Autor: Antzutkin, O N ; Lee, Y K ; Levitt, M H
Assuntos: Ampicillin - chemistry ; Anisotropy ; Magnetic Resonance Spectroscopy ; Models, Structural ; Penicillin V - chemistry
É parte de: Journal of magnetic resonance (1997), 1998-11, Vol.135 (1), p.144-155
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: The principal values of the chemical shift tensors of all 13C and 15N sites in two antibiotics, ampicillin and penicillin-V, were determined by 2-dimensional phase adjusted spinning sideband (2D-PASS) and conventional CP/MAS experiments. The 13C and 15N chemical shift anisotropies (CSA), and their confidence limits, were evaluated using a Mathematica program. The CSA values suggest a revised assignment of the 2-methyl 13C sites in the case of ampicillin. We speculate on a relationship between the chemical shift principal values of many of the 13C and 15N sites and the beta-lactam ring conformation.
Editor: United States
Idioma: Inglês

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