The alternating of substituent effect on the 13C NMR shifts of all bridge carbons in cinnamyl aniline derivatives
✍ Scribed by Guanfan Chen; Chenzhong Cao; Yun Zhu; Zhenxing Wu; Xiangsi Wu
- Book ID
- 119360007
- Publisher
- Elsevier Science
- Year
- 2012
- Tongue
- English
- Weight
- 265 KB
- Volume
- 99
- Category
- Article
- ISSN
- 1386-1425
No coin nor oath required. For personal study only.
📜 SIMILAR VOLUMES
## Abstract A general equation describing the effect of substituents on α‐carbons in a saturated framework was developed from ^13^C chemical shifts obtained under uniform conditions for selected aliphatic compounds. Experimental correlations for β‐ and γ‐carbons and a discussion of the results are
## Abstract ^13^C chemical shifts obtained under uniform conditions for selected compounds containing secondary aliphatic fragments were employed in a linear regression analysis. Two‐parameter relationships describing the substituent effects in the saturated framework were calculated, and the usefu
There are many literature examples correlating C-13 n.m.r. substituent chemical shifts in substituted benzenes with Bsamett substituent constants.' The direction of these substituent chemical shifts has been logically explained in terms of substituent electronic properties; the electron donors resul
## Abstract ^13^C chemical shifts and ^31^P,^13^C coupling constants are reported for nine 1‐hydroxyalkylphosphonic and two additional phosphonic acids. The α‐substituent‐induced chemical shifts (α‐SCS) of the phosphonate group were calculated and their non‐additivity was observed. Good linear corr