Hydrolytic degradation of α-substituted polyglycolic acids: A semiempirical computational study
✍ Scribed by Lawrence M. Pratt; C.C. Chu
- Publisher
- John Wiley and Sons
- Year
- 1993
- Tongue
- English
- Weight
- 850 KB
- Volume
- 14
- Category
- Article
- ISSN
- 0192-8651
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✦ Synopsis
The two-step hydrolyses of substituted polyglycolic acids are modeled by the semiempirical MNDO Hamiltonian using small molecule analogs to determine the effect of the alkyl substituents on the reaction and activation enthalpies. Reaction enthalpies remain reasonably constant up to three carbons, before becoming less exothermic for large alkyl substituents. Activation enthalpies show patterns that can be explained by steric effects.
📜 SIMILAR VOLUMES
The theory of the potentiometric method for studying complexes of ionizable substrates was developed, and graphical techniques are described for obtaining stability constant estimations from the data. The method described is for a system in which the conjugate acid and base forms of the substrate (S