## Abstract The ^13^C spectra of five cephalosporins have been recorded and interpreted.
NMR imaging of carbon-13
β Scribed by Donald W Kormos; Hong N Yeung; Robert C Gauss
- Publisher
- Elsevier Science
- Year
- 1987
- Weight
- 456 KB
- Volume
- 71
- Category
- Article
- ISSN
- 0022-2364
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
## Abstract Carbonβ13 and hydrogen NMR data are presented for several cyclopropanes with one to four fluorine atoms attached to the ring. Substituents directly attached to a ring carbon are found to unshield that carbon to an extent increasing with their electronegativity, but remote substituents m
## Abstract The assignment of all ring carbons of __p__βbenzoquinones derived from perezone and from thymoquinone was completed using gated decoupled spectra. The long range protonβcarbon couplings are discussed in terms of the degree of substitution of the quinone ring. The tautomeric interconvers