NCERT/CBSE CHEMISTRY CLASS 12 textbook
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CHAPTER TEN
HALOALKANES AND HALOARENES
EXERCISES
10.21
Primary alkyl halide C4H9Br (a) reacted with alcoholic KOH to give compound (b).
Compound (b) is reacted with HBr to give (c) which is an isomer of (a). When
(a) is reacted with sodium metal it gives compound (d), C8H18 which is different
from the compound formed when n-butyl bromide is reacted with sodium.
Give the structural formula of (a) and write the equations for all the reactions.
When (a) reacts with Na metal it gives (d) of MF C8H18
.
2,5 dimethyl hexane is different from the compound (octane )formed when n-butyl
bromide is reacted with sodium.Therefore as per the question given (a) must be
isobutyl bromide.
When Compound (a) isobutyl bromide reacts with alcohol 3-methyl-1-propene is
formed , which is compound (b)
The compound (b) gives compound (c) on reacting with HBr which is a isomer of
(a).
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NCERT/CBSE CHEMISTRY CLASS 12 textbook
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Thus the compounds a, b, c and d are Isobutyl bromide , 2-methyl-1-propene, ter
butyl bromide and 2,5 dimethyl hexane respectively.
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