Single Choice

What are the products of dehydrohalogenation of 2- iodopentane?

A$$2-$$ Pentene (major), $$1-$$ Pentene (minor)
Correct Answer
B$$1-$$ Pentane (major), $$2-$$ Pentane (major)
C$$2-$$ Pentane $$(50\%), 1-$$ Pentane $$(50\%)$$
DNone of these

Solution

$$C{H}_{3}C{H}_{2}C{H}_{2}−\underset{\overset{|}{I}}{CH}−C{H}_{3} \xrightarrow{\text{alc.KOH}} \underset{\text{2-Pentene (major)}}{C{H}_{3}C{H}_{2}−CH=CH−C{H}_{3}} + \underset{\text{1-Pentene (minor)}}{C{H}_{3}C{H}_{2}C{H}_{2}−CH=C{H}_{2}}$$

The products are 2-Pentene (Major) and 1-Pentene (Minor).

More substituted alkene is major product.

Thus, the correct answer is $$(A)$$.

SIMILAR QUESTIONS

Haloalkanes and Haloarenes

$$2$$-Bromo pentane when treated with alc. $$KOH$$ yields a mixture of three alkenes. Identity which is predominant ?

Haloalkanes and Haloarenes

Heterolysis of a carbon -chlorine bond produces ?

Haloalkanes and Haloarenes

Alkyl halides reactivity order in unimolecular elimination reactions $$(E^{1})$$ is:

Haloalkanes and Haloarenes

How will you convert the following ? Isopropylbromide to propene

Haloalkanes and Haloarenes

Heating of 2-chloro-1-phenylbutane with $$EtOK/EtOH$$ gives $$X$$ as the major product. Reaction of $$X$$ with $$Hg(OAc)_2/H_2O$$ followed by $$NaBH_4$$ gives $$Y$$ as the major product. $$Y$$ is :

Haloalkanes and Haloarenes

Heterolysis of a carbon -chlorine bond produces ?

Haloalkanes and Haloarenes

The ease of dehydrohalogenation for different halogens is in the order:

Haloalkanes and Haloarenes

a) Write the equations for the steps in $$S_N1$$ mechanism of the conversion of teri-Butyl bromide into tert-Butyl alcohol. b) Explain Fitting reaction. c) Name the reagent used in the dehydrohalogenation of haloalkanes.

Haloalkanes and Haloarenes

Choose the correct answer among the alternatives given : 2-Chloro-2methylpropane on reaction with alc. $$KOH$$ gives X as the product , X is ?

Haloalkanes and Haloarenes

A mixture of 1-chloropropane and 2-chloropane when treated with alcoholic $$KOH$$ gives:

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