Author(s):
Reva, Igor D. 
; Jarmelo, Susana ; Lapinski, Leszek ; Fausto, Rui
Date: 2004
Persistent ID: http://hdl.handle.net/10316/5136
Origin: Estudo Geral - Universidade de Coimbra
Document details
First experimental evidence of the third conformer of glycolic acid: combined m...
Description
The FT-IR spectra of monomeric glycolic acid, GA, isolated in argon and xenon matrices (at 10 and 20 K) were studied, enabling identification of three different conformers of GA. The most stable SSC conformer involves a hydrogen bond between the carbonyl group and the hydrogen atom of the alcohol hydroxyl group. The minor GAC and AAT forms involve intramolecular hydrogen bonds between alcohol and carboxyl OH groups, with alcohol and carboxylic groups serving as proton donors, respectively. The GAC conformer, predicted by theoretical calculations (at the DFT/B3LYP and MP2 levels with the 6-31++G(d,p) and aug-cc-pVDZ basis sets) as the second most stable form, was now experimentally identified for the first time. http://www.sciencedirect.com/science/article/B6TFN-4C2FHSF-7/1/8b868591b7c14f11e4cc9abeb26b9e20
The FT-IR spectra of monomeric glycolic acid, GA, isolated in argon and xenon matrices (at 10 and 20 K) were studied, enabling identification of three different conformers of GA. The most stable SSC conformer involves a hydrogen bond between the carbonyl group and the hydrogen atom of the alcohol hydroxyl group. The minor GAC and AAT forms involve intramolecular hydrogen bonds between alcohol and carboxyl OH groups, with alcohol and carboxylic groups serving as proton donors, respectively. The GAC conformer, predicted by theoretical calculations (at the DFT/B3LYP and MP2 levels with the 6-31++G(d,p) and aug-cc-pVDZ basis sets) as the second most stable form, was now experimentally identified for the first time. http://www.sciencedirect.com/science/article/B6TFN-4C2FHSF-7/1/8b868591b7c14f11e4cc9abeb26b9e20
Document Type
Article
Language English
Language English
| Financiadores do RCAAP | |||||||
|
|
|
|
|
|
||