The relationship between the energy and the electron migration of NO 2 group was established to elucidate the stabilization caused by the interaction between the two moieties of the complex. The vibrational shifts of tetrahedral C—N and C—H bonds suggest that the nitration of toluene may ...
IN order to check the constitution of preparations of the three different tritium toluenes carrying radiochemical amounts of tritium in the aromatic nucleus, samples were transformed into 2,4-dinitrotoluene with an excess of a mixture of 1 part (by volume) of concentrated nitric acid and 2 ...
A theoretical study on selectivity for nitration of toluene with nitronium Four nitration trajectories of benzene and toluene with nitronium ion have been calculated. Totally twelve stationary points including four transition stat... 陈丽涛,肖鹤鸣,肖继军 - 《Acta Chimica Sinica》 被引量: 52发表: 200...
In the nitration of toluene, the product distribution is far from statistical. We getmuchless meta (5%) than expected, and moreortho(57%) andpara(37%) than expected. In this sense we can say that the methyl group tends to act as anortho-para-director: it “directs” the electrophile ...
Electrophilic Aromatic Substitution: TheNitrationof Toluene Abstract This industrially important reaction of EAS: TheNitrationof Toluene exhibits how the attack of a nitronium ion would give out major and minor products at different positions of toluene. This is an electrophilic substitutionmechanism. Mixtu...
Predict the major products of the following reactions: (a) Nitration of bromobenzene (b) Bromination of nitrobenzene (c) Chlorination of phenol (d) Bromination of aniline What will be the major product of the reaction of 2-methyl l-2-butene with each of the fo...
intensities generated in the due to order of 104, and the main peak appears at hydroxylation and nitration of MO during 421 m/z, which may be the treatment with the D[C-1A4HPP13JNs4eNtuap+.OD8u−rSi +ng Hth]+e reaction of MO with RONS generated by plasma, we thus ...
toluenenitrationbetazeolitedensity functional theoryPeriodic density functional theory calculations were performed to investigate the origin of the favourable para-selective nitration of toluene exhibited by zeolite H-beta with acetyl nitrate nitration agent. Energy calculations were performed for each of the ...
The 15N CIDNP effects are generated in radical pairs formed during encounters of NO2 and arene radical cations or aroxyl radicals. The mechanism given is valid for arenes more reactive than toluene.ManfredLehnigSDOSTetrahedron LettersLehnig, M. The mechanism of the nitration of donor-activated ...
Mechanism of Nitration of the Aromatic Nucleus IN order to check the constitution of preparations of the three different tritium toluenes carrying radiochemical amounts of tritium in the aromatic nucleu... L Melander - 《Nature》 被引量: 42发表: 1949年 Deep brain stimulation in Parkinson's dis...