NCERT Class XI Chemistry Organic Chemistry Some basic principles and Techniques Solutions
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Question : 2
Total: 40
Indicate the s and p bonds in the following molecules :
C 6 H 6 , C 6 H 12 , C H 2 C l 2 C H 2 = C = C H 2 C H 3 N O 2 , H C O N H C H 3
Solution:
The σ and π bonds are indicated below :
(i)
(ii)C 6 H 12
(a) Straight chain compound
H 3 C − H 2 C − H 2 C − H C = C H − C H 3
H
H
12 C-H σ - bonds
5 C-C σ - bonds
1 C-C π - bond
Other straight chain isomers will also have the same no. of σ and π bonds.
(ii)
12 C-H σ bonds
Other cyclic isomers will also have sam no. of σ and π - bonds.
(iii)
2 C-H σ bonds
2 C-Cl σ bonds
(iv)
4 C-H σ bonds
2 C-C σ bonds
2 C-C π bonds
(v)
3 C-H σ bonds
1 C-N σ bond
1 N-O σ bond
1 N-O π bond
(vi)
4C-H σ bonds
1 N-H σ bond
1 C-O π bond
1C-O σ bond
2 C-N σ bonds
(i)
(ii)
(a) Straight chain compound
12 C-H σ - bonds
5 C-C σ - bonds
1 C-C π - bond
Other straight chain isomers will also have the same no. of σ and π bonds.
(ii)
6 C-C σ bonds
12 C-H σ bonds
Other cyclic isomers will also have sam no. of σ and π - bonds.
(iii)
2 C-H σ bonds
2 C-Cl σ bonds
(iv)
4 C-H σ bonds
2 C-C σ bonds
2 C-C π bonds
(v)
3 C-H σ bonds
1 C-N σ bond
1 N-O σ bond
1 N-O π bond
(vi)
4C-H σ bonds
1 N-H σ bond
1 C-O π bond
1C-O σ bond
2 C-N σ bonds
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