𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Carbon-13 chemical shifts of substituted nortricyclenes

✍ Scribed by E. Lippmaa; T. Pehk; J. Paasivirta

Publisher
John Wiley and Sons
Year
1973
Tongue
English
Weight
859 KB
Volume
5
Category
Article
ISSN
0749-1581

No coin nor oath required. For personal study only.

✦ Synopsis

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 provide valuable data about the steric effects in strained molecules and can be used as increments for structural analysis, particularly for the determination of orientations of substituent groups.

📜 SIMILAR VOLUMES

Substituent effects on carbon-13 chemica
Substituent effects on carbon-13 chemical shifts of para-substituted benzylbenzenes
✍ Yoshimi Nakai; Tetsuo Takabayashi; Fukiko Yamada 📂 Article 📅 1980 🏛 John Wiley and Sons 🌐 English ⚖ 234 KB

## Abstract Carbon‐13 chemical shifts of fourteen __para__‐substituted benzylbenzenes have been determined. The relative substituent chemical shifts (SCS) of the methylene carbons and the aromatic ring carbons (C‐4, C‐1′ and C‐4′) correlated well with the Hammett substituent effects using the dual

Carbon-13 chemical shifts of monosubstit
Carbon-13 chemical shifts of monosubstituted cyclohexanes
✍ T. Pehk; E. Lippmaa 📂 Article 📅 1971 🏛 John Wiley and Sons 🌐 English ⚖ 518 KB

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,

Carbon-13 chemical shifts and conformati
Carbon-13 chemical shifts and conformations of dimethylcyclohexanols
✍ T. Pehk; H. Kooskora; E. Lippmaa 📂 Article 📅 1976 🏛 John Wiley and Sons 🌐 English ⚖ 545 KB

## 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.

Carbon-13 NMR chemical shifts in some su
Carbon-13 NMR chemical shifts in some substituted 1,2,4-triazol-3-ones
✍ William M. Litchman; Ulrich Hollstein; E. Paul Papadopoulos 📂 Article 📅 1978 🏛 John Wiley and Sons 🌐 English ⚖ 643 KB

## Abstract Carbon‐13 NMR data for 15 substituted 1,2,4‐triazol‐3‐ones are presented and discussed with regard to enolization in the neutral molecules. The coupling constant and chemical shift data show that the proton at N‐2 is not exchanging rapidly in the DMSO‐__d__~6~ solvent. Using D~2~OOD^−^

Carbon-13 chemical shifts of α,β-unsatur
Carbon-13 chemical shifts of α,β-unsaturated acids
✍ E. Lippmaa; T. Pehk; K. Andersson; C. Rappe 📂 Article 📅 1970 🏛 John Wiley and Sons 🌐 English ⚖ 727 KB

## Abstract Carbon‐13 spectra of 59 α,β‐unsaturated carboxylic acids have been measured. Large differential shieldings of ethylenic carbons in the __cis__ and __trans__ isomers of acrylic acid derivatives were found (altogether 15 isomeric __Z__‐ and __E__‐pairs of acids were investigated). The ori