Mechanisms of nucleophilic substitution. Kinetics of the reactions of benzyl and diphenylmethyl chlorides in aqueous acetone

1971 ◽  
pp. 797 ◽  
Author(s):  
B. J. Gregory ◽  
G. Kohnstam ◽  
A. Queen ◽  
D. J. Reid
Keyword(s):  
Nucleophilic Substitution ◽  
Aqueous Acetone ◽  
Kinetics Of

Kinetics of nucleophilic substitution in 1,1-diaryl-2-fluoroethylenes

1969 ◽  
pp. 1100 ◽  
Author(s):  
P. Beltrame ◽  
P. L. Beltrame ◽  
M. L. Cereda ◽  
G. Lazzerini
Keyword(s):  
Nucleophilic Substitution ◽  
Kinetics Of

Kinetics of the chlorination of azobenzene and comparison with azoxybenzene

1984 ◽  
Vol 37 (11) ◽  
pp. 2249
Author(s):  
KA Ahmed ◽  
PJ Hanhela ◽  
M Hassan ◽  
J Miller ◽  
DB Paul
Keyword(s):  
Nucleophilic Substitution ◽  
Kinetic Data ◽  
Electrophilic Substitution ◽  
Relative Rate ◽  
Molecular Chlorine ◽  
Partial Rate ◽  
Reaction Proceeds ◽  
Kinetics Of ◽  
No Activation

The activating effect of the phenylazo substituent in electrophilic substitution has been examined. The rates and partial rate factors for chlorination of azobenzene with molecular chlorine and protonated chlorine acetate have been determined relative to benzene. Whereas the chlorine acetate reaction proceeds readily (relative rate 4900) there is virtually no activation to chlorination by molecular chlorine. Complexes between azobenzene and bromine were, however, isolated and chatacterized. Their formation implies that during molecular halogenation reactions the electrophile is essentially unavailable. The relative chlorination rates for azobenzene and azoxybenzene have also been established: the phenylazo group is more activating towards protonated chlorine acetate whereas azoxybenzene (which does not complex with halogens) is the more reactive with molecular chlorine. The chlorination results confirm the versatility of the phenylazo group which is the first substituent for which kinetic data have been obtained quantifying activation of aromatic electrophilic, radical and nucleophilic substitution.

Kinetics of the Decomposition of Sulphur Dicyanide in Aqueous Solution

1962 ◽  
Vol 15 (2) ◽  
pp. 211 ◽  
Author(s):  
W Kitching ◽  
RH Smith ◽  
IR Wilson
Keyword(s):  
Aqueous Solution ◽  
Aqueous Solutions ◽  
Nucleophilic Substitution ◽  
Perchloric Acid ◽  
Reaction Path ◽  
Acid Solutions ◽  
Kinetics Of

The kinetics and stoicheiometry of the decomposition of aqueous solutions of sulphur dicyanide have been studied at temperatures between 0-70 �C and in media ranging from dilute perchloric acid to pH 7. The predominant reaction is nucleophilic substitution at carbon, but in perchloric acid solutions an alternative reaction path has been revealed.

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