question 1
(Uespi) One of the great contributions to organic synthesis occurred in 1877, in the laboratory of Charles Friedel. These reaction processes of acylation and alkylation of benzene and derivatives came to be called Friedel-Crafts reactions. The mechanism of these reactions is that of a reaction of:
a) addition.
b) nucleophilic substitution.
c) electrophilic replacement.
d) elimination.
e) dehydration.
question 2
(Uema) Toluene or methylbenzene is the raw material from which, among others, saccharin, medicines, dyes, perfumes, TNT and detergents are obtained. It is widely used as a solvent for paints, coatings, rubbers and resins, but its manufacture is prohibited in Brazil because its inhalation causes serious damage to the organism, leading to chemical dependency, as in the case of inappropriate use of the popular “glue of shoemaker”. Toluene can be obtained through the equation shown below:
Analyzing the reaction presented, judge the claims.
I. Represents an addition reaction in aromatics.
II. Represents a halogenation reaction of benzene.
III. The compound X that forms in the reaction is hydrogen chloride.
IV. Represents a Friedel-Crafts alkylation reaction.
V. The compound X that forms is ethyl chloride by the Diels-Alder reaction.
What is stated only in:
a) I, III and V.
b) III and IV.
c) IV.
d) II and III.
e) I and IV.
More questionsHydrogenionic potential and hydroxylionic potential are the names to which the abbreviations pH and pOH refer. In this class, we will understand the concept of these two potentials.
Continuing the studies on language addictions, in this video lesson we will address barbarism, which corresponds to deviations in phonetic, morphological and semantic levels, and solecism, in level syntactic.
