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Ortho effects IV. Rates of alkaline hydrolysis of ethyl benzoates in aqueous dimethyl sulfoxides

โœ Scribed by Masaru Hojo; Masanori Utaka; Zen-ichi Yoshida

Publisher
Elsevier Science
Year
1966
Tongue
French
Weight
235 KB
Volume
7
Category
Article
ISSN
0040-4039

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โœฆ Synopsis

In our last pa&u (I) it ras reported that in the olkaline'hydrolysis of substituted ethyl bensoates the change of the solvent from' 85 %(rt.) aqueous ethanol to 3 %(rt.) aqueous ethanol caused 5C times increase in the rate of the unsubstituted compound and decrease to a half in the Bammett p value, while the ortho effects, estimated as

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Ortho effects III. Rates of alkaline hyd
Ortho effects III. Rates of alkaline hydrolysis of ethyl benzoates in water
โœ Masaru Hojo; Masamori Utaka; Zen-ichi Xoshida ๐Ÿ“‚ Article ๐Ÿ“… 1966 ๐Ÿ› Elsevier Science ๐ŸŒ French โš– 206 KB

From the mechanistic standpoint alkaline hydrolysis of substituted benzoates has repeatedly been studied carefully and much rate data in various conditions are now available (l-3). Nowever, all these measurements were carried out in organic solvents containing relatively small amounts of water.

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Subsequent to the review artlole of Pmker 1) wherein he had pointed out the remarkable rate enha&& ability of dipolu a$rotio aolventr euoh am dimethpl aulfoxide on S# reaotlona in~olrl.ng anions, amer of paper6 hare appeared on the alkaline hydrolysis of monoeater in DlBO -water mixtures "!