Monosubstituted cyclohexanes were synthesized by addition of a cyclohexyl radical to olefins bearing different substituents at the a-position. Six distinct methylene "C resonances were observed, indicating that the methylene carbons located at the 2 and 6 positions and at the 3 and 5 positions are n
Carbon-13 chemical shifts of monosubstituted cyclohexanes
✍ Scribed by T. Pehk; E. Lippmaa
- Publisher
- John Wiley and Sons
- Year
- 1971
- Tongue
- English
- Weight
- 518 KB
- Volume
- 3
- Category
- Article
- ISSN
- 0749-1581
No coin nor oath required. For personal study only.
✦ Synopsis
The carbon-13 chemical shifts of monosubstituted cyclohexane derivatives are compared with those of aliphatic compounds. The polar substituents exert a similar influence on the M-, Band y-carbons in both series of compounds. The 8-effect is shown to be characteristic mainly to the cyclic compounds, however. The appearance of a 8-effect is discussed as a possible consequence of electron delocalization in alicyclic molecules. A correlation of these &effects with inductive parameters of the substituents is presented.
📜 SIMILAR VOLUMES
## Abstract ^13^C chemical shifts are reported for adamantane, nine 1‐substituted adamantanes and nine 2‐substituted adamantanes. The substituents are F, Cl, Br, I, NH~2~, OH, CH^2^, CN and CO~2~H. The assignments and results are discussed in terms of chemical shift patterns.
## Abstract ^13^C NMR chemical shifts for some 3‐heterosubstituted 2‐methylpropenes are reported. The α‐methylene chemical shifts show excellent linear correlations with the corresponding data for some substituted carbonyl compounds (propanones, methyl acetates and __N__,__N__‐diethylacetamides). T
## Abstract ^13^C NMR spectra of a series of substituted nortricyclene derivatives have been measured, and the ^13^C chemical shifts interpreted in terms of α, β, γ and δ‐effects. The nature of these substiuent shifts is discussed together with some analytical possibilities. The substituent shifts
## Abstract Carbon‐13 chemical shifts of all twenty‐two dimethylcyclohexanols, formed by the hydrogenation of isomeric xylenols, have been measured and assigned. Conformational peculiarities of dimethylcyclohexanols are discussed on the basis of their carbon‐13 chemical shifts.