𝔖 Bobbio Scriptorium
✦   LIBER   ✦

13C and 1H NMR chemical shift assignments of 1- and 2-alkylnaphthalenes (R = Me, Et, i-Pr, t-Bu) and determination of substituent effects on 13C and 1H chemical shifts

✍ Scribed by Ludger Ernst; Petra Schulz

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

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Complete ^13^C spectral assignments were made for 1‐ and 2‐R‐naphthalenes (R = Me, Et, i‐Pr, t‐Bu) in CDCl~3~ solution (5 mol%) by the use of 2D techniques including 2D INADEQUATE. Contradictory assignments from the literature were clarified and incomplete data completed. Substituent effects on ^13^C shifts are briefly discussed. ^1^H chemical shifts were determined by ^13^C/^1^H shift correlation.

📜 SIMILAR VOLUMES

Substituent effects on 1H and 13C NMR ch
Substituent effects on 1H and 13C NMR chemical shifts in α-monosubstituted ethyl acetates: principal component analysis and 1H chemical shift calculations
✍ Ljubica Tasic; Raymond J. Abraham; Roberto Rittner 📂 Article 📅 2002 🏛 John Wiley and Sons 🌐 English ⚖ 126 KB

## Abstract A principal component analysis is applied to α‐monosubstituted ethyl acetates (YCH~2~CO~2~Et), where the observed chemical shifts for the α‐carbon atom, the carbonyl carbon, and the α‐hydrogen atoms are correlated with theoretically derived molecular properties, i.e. the partial charges

1H and 13C NMR chemical shift assignment
1H and 13C NMR chemical shift assignment of some 3H-naphtho[2,1-b]pyrans
✍ Renaud Demadrille; Corinne Moustrou; Mylène Campredon; Gérard Giusti; Robert Fau 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 81 KB 👁 2 views

The 1H and 13C NMR resonances of four 3H-naphtho[2,1-b]pyrans were completely and unambiguously assigned by a combination of homonuclear (gs-COSY), 1H-detected heteronuclear one-bond (gs-HMQC) and long-range (gs-HMBC) gradient-selected correlation experiments.

Assignment of 1H and 13C NMR Chemical Sh
Assignment of 1H and 13C NMR Chemical Shifts of Nitroxanthones and Development of Additivity Rules
✍ W. Ibrom; A. W. Frahm 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 422 KB 👁 2 views

H and 13C NMR chemical shifts and the homo-and heteronuclear coupling constants of 14 nitroxanthones are presented. Specific nitro increments for xanthones depending on substituent position and on the respective ring carbon position and shift additivity rules were developed by means of multiple line

Substituent effects on 13C and 1H chemic
Substituent effects on 13C and 1H chemical shifts in 3-benzylidene-2,4-pentanediones
✍ E. Solčániova; P. Hrnčiar; T. Liptaj 📂 Article 📅 1982 🏛 John Wiley and Sons 🌐 English ⚖ 275 KB

## Abstract Substituent effects on the ^13^C and ^1^H chemical shifts have been studied for derivatives of 3‐benzylidene‐2, 4‐pentanedione. A significant correlation has been found between chemical shifts of the __Z__ carbonyl group (C‐2) and Hammett constants, while no correlation has been found f

1H and 13C NMR chemical shifts of some t
1H and 13C NMR chemical shifts of some thienyl-substituted chromenes
✍ C. Moustrou; N. Rebiere; M. Frigoli; E. Pottier; R. Guglielmetti; R. Faure 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 172 KB 👁 2 views

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.