## Abstract The kinetics and mechanisms of the initial steps of formation of polyetherols from hydroxymethyl derivatives of uric acid and oxiranes were studied. It has been found that initial steps of the reaction of polyetherol formation occur without a catalyst. The NH groups, which are formed up
Reactions of hydroxymethyl derivatives of uric acid with oxiranes: Recognition of mechanism based on kinetic studies
β Scribed by Jacek Lubczak
- Publisher
- John Wiley and Sons
- Year
- 2006
- Tongue
- English
- Weight
- 197 KB
- Volume
- 38
- Category
- Article
- ISSN
- 0538-8066
No coin nor oath required. For personal study only.
β¦ Synopsis
Abstract
Kinetic and mechanistic studies on the reaction between 1 equivalent of 1,3,7,9βtetrakis(hydroxymethyl) ureate with 1 equivalent of oxirane (ethylene oxide or propylene oxide) are presented. This study led to recognition of the mechanism of reaction. It has been found that during the reaction the release of formaldehyde from hydroxymethyl groups blocked with oxirane occurs. The formaldehyde is consequently bound to the end of etherol chain. Owing to this rearrangement, the amount of formaldehyde remains constant during the process. Β© 2006 Wiley Periodicals, Inc. Int J Chem Kinet 38: 345β350, 2006
π SIMILAR VOLUMES
## Abstract The reaction of a F atom with an NCO radical was studied at 6β311+g\* level, using DFT methods. All geometries, vibrational frequencies, and energies of different stationary points were calculated by HF, UMP2, and DFT methods, and the results agreed with the experimental values. The vib