𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Studies on the conformational equilibrium of trans-2- styrylquinoline

✍ Scribed by Sang Chul Shim; Dong Won Kim; Maeng Sup Kim

Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
808 KB
Volume
56
Category
Article
ISSN
1010-6030

No coin nor oath required. For personal study only.

✦ Synopsis

The absorption and fluorescence spectra of 2-styrylquinoline (2-StQ) indicate that two conformers exist in equilibrium in aprotic solvents, whereas only one conformer exists in protic solvents. The intermolecular hydrogen bonding between the solute and solvent plays an important role in changing the conformational equihbrium of 2-StQ. Comparing the conformationally restricted analogue 3-methyl-2-styrylquinoline with 2-StQ, the long wavelength absorbing component of 2-StQ can be assigned to the conformer (B) which has a planar geometry and the short wavelength absorbing species can be assigned to the conformer (A) which has the quinoline ring twisted from the molecular plane.

πŸ“œ SIMILAR VOLUMES

Solvent influence on the conformational
Solvent influence on the conformational equilibrium of 2,2β€²-bipyridine
✍ Jerzy Kalenik; Zbigniew PaweΕ‚ka πŸ“‚ Article πŸ“… 2005 πŸ› Elsevier Science 🌐 English βš– 168 KB

The relative energies and dipolar properties of two conformers of 2,2V-bipyridine (1) were calculated using AM1 and ab initio methods. Dipole moments of 1 and pyridine in many organic solvents were determined. On this basis, the Gibbs energy DG (s) for the conformational s-transWs-cis equilibrium of

Configuration and Conformational Study o
Configuration and Conformational Study of Some 2-Aryl-trans-decahydroquinolin-4-ones
✍ N. Bhavani; D. Natarajan πŸ“‚ Article πŸ“… 1996 πŸ› John Wiley and Sons 🌐 English βš– 385 KB πŸ‘ 2 views

The assignments of the proton and carbon signals and conformations of substituted 2-aryl-trans-decahydroquinolin-4-ones were determined using a combination of 'H, "C, COSY and HETCOR spectral data. Analysis of the spectral data reveals that these compounds exist predominantly in twin-chair conformat

The conformational equilibrium of [2.2]p
The conformational equilibrium of [2.2]paracyclophanes in solution
✍ Ernst, Ludger πŸ“‚ Article πŸ“… 1995 πŸ› John Wiley and Sons 🌐 English βš– 506 KB

## Abstract A conformational equilibrium exists in solution between two skew forms (__s__^+^ and __s__^βˆ’^) of [2.2]paracyclophane (1a). The vicinal coupling constants in the ^1^H‐NMR spectra of the bridge protons in the six __ar__‐monosubstituted derivatives 1b–1g (Rο£ΎCN, NO, Br, CH~3~, CHO, and NO~