Solvation of ions. XVIII. Protic-dipolar aprotic solvent effects on the free energies, enthalpies, and entropies of activation of an SNAr reaction

1973 ◽  
Vol 95 (2) ◽  
pp. 408-410 ◽  
Author(s):  
B. G. Cox ◽  
A. J. Parker
Keyword(s):  
Solvent Effects ◽  
Aprotic Solvent ◽  
Free Energies ◽  
Dipolar Aprotic Solvent ◽  
Solvation Of Ions ◽  
Snar Reaction

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.

Solvation of Ions. V. Rates of SN2 Reactions in Mixtures of Protic and Dipolar Aprotic Solvents

1963 ◽  
Vol 16 (4) ◽  
pp. 585 ◽  
Author(s):  
AJ Parker
Keyword(s):  
Aprotic Solvent ◽  
Chloride Ion ◽  
Solvent Mixtures ◽  
Protic Solvent ◽  
Dipolar Aprotic Solvent ◽  
Sn2 Reactions ◽  
Protic Solvents ◽  
Bonding Interaction ◽  
Solvation Of Ions ◽  
Dipolar Aprotic Solvents

The rates of reaction of methyl iodide with chloride ion in some protic-dipolar aprotic solvent mixtures have been measured. The rate-retarding effect of protic solvents at M concentration in dimethylacetamide is in the order p-NO2C6H4OH > C6H5OH > C6H5SH > C6H5CO2H ≈ CH3OH > C6H5NH2 >H2O ≈ D2O. Protic solvents slow the reaction by a general rather than a specific hydrogen bonding interaction with the anion. Both the dipolar aprotic solvent and the protic solvent, as well as the anion, accept hydrogen bonds, and this influences the interaction between protic solvent and anion.

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

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 Affine-response model of molecular solvation of ions: Accurate predictions of asymmetric charging free energies

2012 ◽  
Vol 137 (12) ◽  
pp. 124101 ◽  
Author(s):  
Jaydeep P. Bardhan ◽  
Pavel Jungwirth ◽  
Lee Makowski
Keyword(s):  
Response Model ◽  
Free Energies ◽  
Solvation Of Ions
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