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Alkanes: preparation (Wurtz, Kolbe, decarboxylation) and reactions
JEE Main level
Single correct option
Difficulty 2 of 3
hc005
2-Bromopropane is treated with sodium metal in dry ether. The main organic product is
A
hexane
B
2,3-dimethylbutane
C
2-methylpentane
D
propane
Answer: B
Wurtz coupling joins two isopropyl groups:
2
(
CH
X
3
)
X
2
CHBr
+
2
Na
(
CH
X
3
)
X
2
CH
−
CH
(
CH
X
3
)
X
2
+
2
NaBr
. The product is 2,3-dimethylbutane.
Practice Hydrocarbons
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