Protic-dipolar aprotic solvent effects on rates of bimolecular reactions

1969 ◽  
Vol 69 (1) ◽  
pp. 1-32 ◽  
Author(s):  
Alan J. Parker
Keyword(s):  
Solvent Effects ◽  
Aprotic Solvent ◽  
Bimolecular Reactions ◽  
Dipolar Aprotic Solvent

ChemInform Abstract: AROMATIC NUCLEOPHILIC EXCHANGE REACTIONS PART 3, DIPOLAR APROTIC SOLVENT EFFECTS

1973 ◽  
Vol 4 (30) ◽  
pp. no-no
Author(s):  
BRIAN DACRE ◽  
DAVID F. MAUNDRELL ◽  
SUSAN E. REES
Keyword(s):  
Solvent Effects ◽  
Aprotic Solvent ◽  
Exchange Reactions ◽  
Dipolar Aprotic Solvent ◽  
Nucleophilic Exchange

Heterocyclic ambident nucleophiles. IV. The alkylation of metal salts of adenine

1982 ◽  
Vol 35 (3) ◽  
pp. 535 ◽  
Author(s):  
M Rasmussen ◽  
JM Hope
Keyword(s):  
Solvent Effects ◽  
Aprotic Solvent ◽  
Alkylating Agents ◽  
Metal Salts ◽  
Main Reaction ◽  
Potassium Salts ◽  
Dipolar Aprotic Solvent ◽  
Protic Solvents ◽  
The Common ◽  
Sodium And Potassium

The N3 : N7 : N9 alkylation patterns for reactions of the lithium, sodium, and potassium salts of adenine with various alkylating agents in dimethyl sulfoxide were determined by 1H n.m.r. spectroscopy. Only for the Li+ salt was any significant effect of ionic association noticed. Of the alkylating agents used, only chloromethyl pivalate gave a concentration dependent alkylation pattern. The latter effect was most pronounced with the heterogeneous alkylation conditions of anhydrous Na2CO3/HCONMe2, adenine, and chloromethyl pivalate; here, increasing concentrations changed the main reaction from N7- to N9-alkylation. Solvent effects on the alkylation patterns were also studied. Within the common dipolar aprotic solvent group, (Me2N)3PO, HCONMe2 and Me2SO, effects were small; in protic solvents, particularly formamide, enhanced N3-alkylation was observed.

scholarly journals Kinetic Solvent Effects on K+/K(Hg)Electrodes in Some Dipolar Aprotic Solvent Systems by Cyclic Voltammetry

1990 ◽  
Vol 63 (5) ◽  
pp. 1489-1495
Author(s):  
Swapan K. Bhattacharya ◽  
Kiron K. Kundu
Keyword(s):  
Cyclic Voltammetry ◽  
Solvent Effects ◽  
Aprotic Solvent ◽  
Dipolar Aprotic Solvent ◽  
Solvent Systems

DIPOLAR APROTIC SOLVENT EFFECTS IN THE HYDROLYSIS OF PHENYLMETHANESULFONATES AND PHENYLSULFONYLACETATES

1979 ◽  
Vol 7 (1) ◽  
pp. 23-29
Author(s):  
P. Krishnan ◽  
S. Sundaram ◽  
N. Venkatasubramanian
Keyword(s):  
Solvent Effects ◽  
Aprotic Solvent ◽  
Dipolar Aprotic Solvent ◽  
Hydrolysis Of

scholarly journals Butadiene sulfone as ‘volatile’, recyclable dipolar, aprotic solvent for conducting substitution and cycloaddition reactions

2015 ◽  
Vol 3 (1) ◽  
Author(s):  
Yong Huang ◽  
Esteban E. Ureña-Benavides ◽  
Afrah J. Boigny ◽  
Zachary S. Campbell ◽  
Fiaz S. Mohammed ◽  
...  
Keyword(s):  
Aprotic Solvent ◽  
Cycloaddition Reactions ◽  
Dipolar Aprotic Solvent

scholarly journals The comparative study of linear solvatation energy relationship for the reactivity of pyridine carboxylic acids with diazodiphenylmethane in protic and aprotic solvents

2012 ◽  
Vol 77 (10) ◽  
pp. 1311-1338 ◽  
Author(s):  
Sasa Drmanic ◽  
Jasmina Nikolic ◽  
Aleksandar Marinkovic ◽  
Bratislav Jovanovic
Keyword(s):  
Solvent Effects ◽  
Kinetic Data ◽  
Aprotic Solvent ◽  
Isonicotinic Acid ◽  
Linear Regression Analysis ◽  
Multiple Linear Regression Analysis ◽  
Reaction Rates ◽  
Aprotic Solvents ◽  
Pyridine Carboxylic ◽  
The Comparative Study

Protic and aprotic solvent effects on the reactivity of picolinic, nicotinic and isonicotinic acid, as well as of some substituted nicotinic acids with diazodiphenylmethane (DDM) were investigated. In order to explain the kinetic results through solvent effects, the second-order rate constants for the reaction of the examined acids with DDM were correlated using the Kamlet-Taft solvatochromic equation. The correlations of the kinetic data were carried out by means of the multiple linear regression analysis and the solvent effects on the reaction rates were analyzed in terms of the contributions of the initial and the transition state. The signs of the equation coefficients support the already known reaction mechanism. The solvatation models for all the investigated acids are suggested and related to their specific structure.

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