Question

Monochlorination of propane yields two constitutional isomers, and dichlorination yields four. Trichlorination yields...

Monochlorination of propane yields two constitutional isomers, and dichlorination yields four. Trichlorination yields five constitutional isomers. Draw all five trichloropropane isomers.


Monochlorination of propane yields two constitutio


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Answer #1
Concepts and reason

Chlorination is a process of adding chlorine molecule to the alkane in the presence of light (hν)\left( {h\nu } \right) to give chlorinated product. Propane on mono chlorination gives two constitutional isomers; On di chlorination gives three constitutional isomers and on tri chlorination gives totally five constitutional isomers.

Fundamentals

• Constitutional isomers: Constitutional isomers are isomers, which have same molecular formula and different arrangement of atoms in the structure.

• In chlorination process, the chlorine atoms replace hydrogen atoms in alkane to produce chlorinated products in presence of sunlight.

• Chlorination process is not selective. It the mixture of products which are possible in this process.

The given alkane is propane

Word root is “prop”

The structure of propane is shown below:

H3C
1
2
CH3
3

Chlorination process of propane under sun light:

On tri chlorination, three chlorine atoms can replace the 3-hydrogen atoms in propane molecule to give tri-chlorinated products in the presence of sun light.

CU
CH, CH₂
H3c
c
0
-
+
3Cl2
Hzc
1
2
0
CH3
3
1,1,1-trichloropropane
1.1.2-trichloropropane
CI
?
[
CICI
+
H01
H3C
H2
1,2,2-tric

Ans:

CU
CH, CH₂
H3c
c
0
-
+
3Cl2
Hzc
1
2
0
CH3
3
1,1,1-trichloropropane
1.1.2-trichloropropane
CI
?
[
CICI
+
H01
H3C
H2
1,2,2-tric

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