Metal ion effects on the rate of intramolecular O-alkylation of the anion of ethyl(3-chloropropyl)acetoacetate
โ Scribed by Roberta Cacciapaglia; Luigi Mandolini
- Publisher
- Elsevier Science
- Year
- 1990
- Tongue
- French
- Weight
- 683 KB
- Volume
- 46
- Category
- Article
- ISSN
- 0040-4020
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โฆ Synopsis
retarding effect of alkali metal and alkaline-earth metal ions on the rate of intramolecular 0-alkylation of the title compound has been thoroughly investigated in 99% aqueous Me2SO at 25-C. Rate data have been dissected into contributions of free ions (ki) and ion pairs (k. ). Xl
Comparison of the present results with available data for intramole lar C-alkylation of a strictly related system, reveals that rate-depressing effects due to cation pairing turn out to be remarkably similar in the two processes, which is at variance with the expectation of a more pronounced cation dependence of the kidki ratios for 0-alkylation than for C-alkylation.
๐ SIMILAR VOLUMES
Rate constants have been determined for hydrolysis of the acetate, glutarate, and phthalate monoesters of 2-hydroxy-1,10-phenanthroline in water at 30 degrees C and &mgr = 0.1 M with KCl. The hydrolysis reactions of the esters are hydroxide ion catalyzed at pH > 9. The phthalate and glutarate monoes