Question

Consider the following reactions and identify the one in which
reactant and product have maximum difference in their degree of
unsaturation.
Br
CI
Br
Na
ether
Br
CI​

Answer 1

Answer:

H2

Explanation:

H

2

/Pt causes the catalytic hydrogenation of alkenes. Since 1 mole of the reagent is present, therefore, it will bring about the addition of H

2

at one double bond only. So, in the compound A, two cyclopentane rings are should be present along with a double bond.

Due to the presence of two rings and one double bond in A its double bond equivalent is 3. We can also calculate it using the formula.

Double bond equivalent =C+1−

2

H

−

2

X

+

2

N

C=10, H=2 less than the product=18−2=16

DBE=10+1−

2

16

=10+1−8=3