## Abstract Fourier transform carbon‐13 nuclear magnetic resonance spectra have been obtained and interpreted for some 2‐substituted tetrahydropyrans. The effects of the substituents on α, β, γ and δ‐carbon atoms are discussed. Using suitable reference compounds the γ‐parameter can be used for quan
A carbon-13 nuclear magnetic resonance spectral investigation of substituted triphenyl phosphates
✍ Scribed by G. W. Buchanan; R. H. Wightman; M. Malaiyandi
- Publisher
- John Wiley and Sons
- Year
- 1982
- Tongue
- English
- Weight
- 296 KB
- Volume
- 19
- Category
- Article
- ISSN
- 0749-1581
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✦ Synopsis
Abstract
^13^C NMR chemical shifts and ^13^C^31^P couplings are reported for triphenyl phosphate and 13 alkyl derivatives. In ortho‐alkylated materials, it is found that the upfield γ shielding effect is only operative when the carbon atom, situated γ to the exocyclic oxygen, bears at least one hydrogen. Conformational changes about the arylO bond can be monitored via the vicinal ^31^pOC^13^C couplings.
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