## Abstract The rate constants for the reaction of 2‐methyl‐cyclohex‐1‐enylcarboxylic, 2‐phenylcyclohex‐1‐enylcarboxylic, and 2‐methylbenzoic and 2‐phenylbenzoic acids with diazodiphenyl‐methane were determined in 14 various solvents at 30°C. To explain the kinetic results through solvent effects,
Solvent effects on CO stretching frequencies of some 1-substituted 2-pyrrolidinones
✍ Scribed by J. B. F. N. Engberts; G. R. Famini; A. Perjéssy; L. Y. Wilson
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 147 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0894-3230
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✦ Synopsis
In an effort to model solute-solvent interactions, the C=O stretching frequencies of five 1-substituted 2pyrrolidinones and four other carbonyl-containing compounds were measured for 30 common solvents. These were then correlated with four empirical parameter sets and one theoretical (computational) parameter set. While an empirical parameter set gave the best correlation equations, the theoretical parameter equations are physically and statistically significant. Solvent volume, polarizability and hydrogen bond donor acidity (capacity) terms are significant in the correlation equations.
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Substituents placed on the phenyl rings of 2,3-diphenyl-1,3-thiazolidin-4-one affect the electron density surrounding both the methine proton and the C(2) carbon. These changes are reflected in the differing chemical shifts for these atoms relative to the parent compound. The other carbons in the he
The kinetics of the reaction between l-chloro-2,4-dinitrobenzene and piperidine was studied in several completely non-aqueous binary solvent mixtures where the preferential solvation is the rule at 15,Z and 40 "C. The reaction was chosen as the simplest example of aromatic nucleophilic substitution