𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Substituent-induced chemical shift 13C NMR study of substituted 2-phenylthiazolidines

✍ Scribed by R. Umarani


Publisher
John Wiley and Sons
Year
1992
Tongue
English
Weight
183 KB
Volume
30
Category
Article
ISSN
0749-1581

No coin nor oath required. For personal study only.

✦ Synopsis


Abstract

The analysis of the ^13^C NMR chemical shifts of 16 substituted 2‐phenylthiazolidines shows that the 1,3‐thiazolid‐2‐yl group exerts a deshielding effect at the ipso carbon (C‐1′) and shielding effects at the ortho and para positions of the benzene ring (C‐2′ and C‐4′), and that the transmission of the resonance effect from the substituents in the phenyl ring to the benzylic carbon (C‐2) in the thiazolidine heterocycle is diminished by the polarizable nitrogen and sulphur atoms.


📜 SIMILAR VOLUMES


Substituent-Induced chemical shifts of 2
✍ R. Umarani 📂 Article 📅 1990 🏛 John Wiley and Sons 🌐 English ⚖ 223 KB

## Abstract The ^1^H NMR 270‐MHz spectra of substituted 2‐phenylthiazolidines were recorded and the substituent‐induced chemical shifts (SCS) of the benzylic proton plotted against σ, the correlation coefficient being 0.801 and −ρ = 10.29 Hz. Halogens show deviations in the SCS plots. When the halo

Substituent-induced 13C chemical shifts
✍ Carlos R. Kaiser; Ernani A. Basso; Roberto Rittner 📂 Article 📅 2001 🏛 John Wiley and Sons 🌐 English ⚖ 69 KB

## Abstract The complete ^13^C NMR analysis of 3‐substituted camphors with F, Cl, Br, I, OH, OMe, SMe, NHMe, NMe~2~ and Me substituents at __endo__ and __exo__ positions, and also the corresponding ‘oxo’ and dichloro derivatives, were obtained by 1D and 2D NMR techniques. The resulting substituent‐

2-(4′-Substituted) phenylisatogens: Anal
✍ B. Stoddart; M. Hooper 📂 Article 📅 1989 🏛 John Wiley and Sons 🌐 English ⚖ 408 KB

The I3C NMR spectra for eight 2-(4'-substituted)phenylisatogens were determined at 30°C in CDCI, . Analysis of the ipso-carbon SCS values was carried out using the well known DSP and DSP-NLR models. Changes in the "C SCS values for the carbon atoms in the isatogen moiety suggest that a small degree

13C NMR chemical shifts of carbonyl grou
✍ Stephanie Patterson-Elenbaum; John T. Stanley; Debra K. Dillner; Shirley Lin; Da 📂 Article 📅 2006 🏛 John Wiley and Sons 🌐 English ⚖ 172 KB

## Abstract ^13^C NMR Substituent chemical shift (SCS) increments have been determined for the carbonyl carbon of a variety of substituted benzaldehydes and acetophenones. The ^13^C NMR chemical shift of the carbonyl carbon can be predicted for many di‐ and trisubstituted benzaldehydes and acetophe