Overall transformation : Ar-H to Ar-R
Named after Friedel and Crafts who discovered the reaction in 1877.
Reagent : normally the alkyl halide (e.g. R-Br or R-Cl) with aluminum trichloride, AlCl3, a Lewis acid catalyst.
The AlCl3 enhances the electrophilicity of the alkyl halide by complexing with the halide.
Electrophilic species : the carbocation (i.e. R +) formed by the "removal" of the halide by the Lewis acid catalyst
The reactive electrophile, the carbocation is prone to rearrangement to a more stable carbocation which will then undergo the alkylation reaction.

Friedel-Crafts reactions are limited to arenes as or more reactive than mono-halobenzenes
Other Lewis acids such as BF3, FeCl3 or ZnCl2 can also be used
Other sources of carbocations can also be used:
from loss of water from alcohols treated with acid such as H2SO4
from the protonation of alkenes by acid such as H2SO4
Alkylation products can also be obtained by the reduction of Friedel-Crafts acylation products
Answer:
Symbolic interaction theory
Explanation:
Symbolic interaction theory is the theory that at the micro-level. It focused on the relationship of a person in society. It is the communication of a person through symbols in society. Through symbols, people make understand the world. Many of the social psychologist study on the pattern of the symbolic interaction by people.
Many of the psychologists observed that people are shaping the world by these symbolic words rather than acting upon it. Irving Goff man a social psychologist said that the focus on symbolic interaction ism led to developing the technique called dermatological analysis.
Answer:
Social-cultural Anthropology.
Physical (Biological) Anthropology.
Archaeological Anthropology.
Linguistic Anthropology.
Applied Anthropology
Hope that helps
