Which set and order of reagents are best used to carry out the following reaction scheme? [Note: more than one answer may or may not apply.] a. 1. HNO3, H2SO4 followed by 2. Cl2, FeCl3 b. 1. Cl2, FeCl3 followed by 2. H2SO4 c. 1. Cl2, FeCl3 followed by 2. AISO3 d. 1. HNO3, H2SO4 followed by 2. Cl2, AICI3 followed by 3. water e. 1. Cl2, FeCl3 followed by 2. AlINO2 f. 1. Cl2, FeCl3 followed by 2. HNO3, H2SO4
Reactive Intermediates
In chemistry, reactive intermediates are termed as short-lived, highly reactive atoms with high energy. They rapidly transform into stable particles during a chemical reaction. In specific cases, by means of matrix isolation and at low-temperature reactive intermediates can be isolated.
Hydride Shift
A hydride shift is a rearrangement of a hydrogen atom in a carbocation that occurs to make the molecule more stable. In organic chemistry, rearrangement of the carbocation is very easily seen. This rearrangement can be because of the movement of a carbocation to attain stability in the compound. Such structural reorganization movement is called a shift within molecules. After the shifting of carbocation over the different carbon then they form structural isomers of the previous existing molecule.
Vinylic Carbocation
A carbocation where the positive charge is on the alkene carbon is known as the vinyl carbocation or vinyl cation. The empirical formula for vinyl cation is C2H3+. In the vinyl carbocation, the positive charge is on the carbon atom with the double bond therefore it is sp hybridized. It is known to be a part of various reactions, for example, electrophilic addition of alkynes and solvolysis as well. It plays the role of a reactive intermediate in these reactions.
Cycloheptatrienyl Cation
It is an aromatic carbocation having a general formula, [C7 H7]+. It is also known as the aromatic tropylium ion. Its name is derived from the molecule tropine, which is a seven membered carbon atom ring. Cycloheptatriene or tropylidene was first synthesized from tropine.
Stability of Vinyl Carbocation
Carbocations are positively charged carbon atoms. It is also known as a carbonium ion.
![Which set and order of reagents are best used to carry out the following reaction scheme? [Note: more than one answer may or may not apply.]
CI
a. 1. HNO3, H2SO4 followed by 2. Cl2, FeCl3
b. 1. Cl2, FeCl3 followed by 2. H2SO4
c. 1. Cl2, FeCl3 followed by 2. AISO3
d. 1. HNO3, H2SO4 followed by 2. Cl2, AICI3 followed by 3. water
e. 1. Cl2, FeCl3 followed by 2. AINO2
f. 1. Cl2, FeCl3 followed by 2. HNO3, H2SO4](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc36a7bdd-b424-4ceb-8898-9ce3c56bd183%2F4358dec5-9e9c-4833-b9a4-73ecafa57cdc%2Fdvt18v_processed.png&w=3840&q=75)
When benzene is treated with Chlorine in presence of Ferric Chloride (or Bromine in presence of Ferric Bromide) then Hydrogen of benzene Ring substituted by one Chlorine atom and one Chlorine or Bromine removed with Hydrogen as HCl or HBr. This Reaction takes place in Dark condition. Fluorinated and iodated compounds can not be prepared by this method because with Fluorine reaction is very fast and explosive while with Iodine reacttis very slow , only possible in presence of Oxidising agents like - HNO3 or HIO4. Thus chlorobenzene is obtained is first step as -
Step by step
Solved in 3 steps with 2 images
