13C chemical shifts of 1-cyano-para-substituted 1,2-diphenylcyclopropanes
✍ Scribed by AndréA Schanck; Isabelle Deblock; Maurice Van Meerssche; Georges Leroy; Josy Weiler
- Publisher
- John Wiley and Sons
- Year
- 1987
- Tongue
- English
- Weight
- 159 KB
- Volume
- 25
- Category
- Article
- ISSN
- 0749-1581
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📜 SIMILAR VOLUMES
## Abstract The proton and carbon chemical shifts for a series of tetrakis(__p__‐substituted phenyl)ethylenes are described. Assignments followed routine substituent chemical shift trends. Both proton and carbon chemical shifts __ortho__ to the varying substituent follow the empirical parameter, __
## Abstract ^13^C chemical shifts are reported for the ring carbons of several substituted Δ^1^‐pyrrolines. Average values for methine and methylene ring carbons facilitate structure elucidation of substituted δ^1^‐pyrrolines by ^13^C NMR spectroscopy.
## Abstract The ^1^H and ^13^C NMR spectra of twenty aryl 2‐acetamido‐2‐deoxy‐β‐D‐glucopyranosides and eighteen aryl 3,4,6‐tri‐__O__‐acetyl‐2‐acetamido‐2‐deoxy‐β‐D‐glucopyranosides have been obtained and assigned. The three‐bond proton coupling constants of these compounds were also obtained.
The complete assignment of the 1H and 13C NMR spectra of eight thienyl-substituted chromenes was achieved by the concerted application of homonuclear (gs-COSY), 1H-detected heteronuclear one-bond (gs-HMQC) and long-range (gs-HMBC) gradientselected correlation experiments.
Complete 13C NMR chemical shift assignments are reported for 32 cyclic and one acyclic 1.3-diketones, either unsubstituted or having one or two substituents at the 2-position. The first two classes exist exclusively in the enol form in (CD,),SO and as mixed tautomers in CDCI,.