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The pi-donating effects of pi-acceptors in R-substituted benzylic cations, R=CF3, H and OCH3 were studied theoretically using isodesmic hydride transfer reactions. It is found that the deletion energy and natural resonance theory (NRT) analyses were useful tools for studying the pi-donating effects of pi-accepting substituents.

The effect of omicron-methyl group on rate, mechanism, and resonance contribution is investigated. It is suggested that the omicron-methyl group of 4-nitrophenyl X-substituted 2-methylbenzoates retards the reactivity by exerting steric hindrance but does not influence the reaction mechanism.

The reactions of benzylamine additions to benzylidenediethylmalonates (BDM) at 20 degrees C, studied kinetically are reported. There is a consistency in the rates of acetonitrile with that expected from the through-conjugative electron-accepting power of the activating groups, (COOEt)(sub 2)

Research has been conducted on furan-2-carbodithioates. The results of the kinetic studies carried out on the pyridinolysis of these compounds are presented.

Research has been conducted on the aryl dithioacetate pyridinolysis. The kinetic studies of this pyridinolysis carried out in acetinitrile are reported.

Research has been conducted on Z-aryl bis(4-methoxyphenyl) phosphate reactions with pyridines. The mechanism and the kinetics of these reactions in acetonitrile have been investigated and discussed.

A computational analysis of the nucleophilic substitution reactions of halide anions with cyclopropenyl halides is discussed. Additionally, the corresponding S(sub)N2 reactions of halide anions with the cyclopropyl halides are presented.

Research has been conducted on the aryl benzenesulfonate reactions with benzylamines in acetonitrile. Results indicate that the reaction has proceeded by S-O (k (sub)s-o) and C-O (k (sub)c-o) bond scission and that S-O (k (sub)s-o) provides reaction pathway.

Research has been conducted on the N-methyl-N-arylcarbamoyl chlorides. The results of the nucleophilic substitution reactions of these compounds with pyridines investigated in the dimethyl sulfoxide are reported.

The substituted reactions of phenancyl compounds with pyridines (XC5H4N) are investigated in acetonitrile at 45.0 degrees C. and the stepwise mechanism is described. This mechanism is supported by the faster rates with pyridines than with anilines.

The addition of benzylamine to benzylidenemalononitrile is a single step reaction, in which concurrent addition of the benzylamine to C(sub)alpha of benzylidenemalononitrile and proton transfer from former to C(sub)beta of the latter occur concurrently with a transition state cyclic structure.

A study concerning kinetics of the phenyl-substituted phenyl chlorophosphate reactions is presented. Results indicate that the activation parameters are in line with the mechanism proposed.

The kinetics and mechanism of the reactions of aryl phenyl chlorothiophosphates and aryl 4-chlorophenyl chlorothiophosphates with substituted anilines in acetonitrile are described. The cross-interaction constant and primary kinetic isotope effects are used for proposing a concerted [S.sub.N]2 mechanism with front- and back-side nucleophilic attack on substrate.