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Chapter 15: Q34. (page 570)

Question: Draw all constitutional isomers formed by monochlorination of each alkane with Cl2 and hv.

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01

Constitutional isomers

The organic compounds with the same molecular formula but different structural arrangements of the constituent elements are known as the constitutional isomers.

02

Monochlorination

The organic reaction involving the replacement of a loosely held hydrogen atom by a chlorine atom initiated by light energy is known as chlorination.

Consider the monochlorination of the given compounds,

a. In 2,2-dimethylhexane five different types of H atom are present that would give five constitutional isomers.


Monochlorination reaction

b. In n-heptane, four different H atom is present that would give rise to four constitutional isomers.


Constitutional isomers

c. In methyl cyclopropane, there are four possible constitutional isomers as follows,


Constitutional isomers of methyl cyclopropane

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Most popular questions from this chapter

Question: Identify the structure of a minor product formed from the radical chlorination of propane, which has molecular formula C3H6Cl2 and exhibits the given 1H NMR spectrum.

Questions: Compounds A and B are isomers having molecular formula C5H12. Heating A with Cl2 gives a single product of monohalogenation, whereas heating B under the same conditions forms three constitutional isomers. What are the structures of A and B?

Question: Nitric oxide, NO•, is another radical also thought to cause ozone destruction by a similar mechanism. One source of NO• in the stratosphere is supersonic aircraft whose jet engines convert small amounts of N2 and O2 to NO•. Write the propagation steps for the reaction of O3 with NO•

Question: Draw all constitutional isomers formed when each alkene is treated with NBS + hν.

a.

b.

c.

Question: Draw the products of radical chlorination and bromination of each compound. For which compounds is a single constitutional isomer formed for both reactions? What must be true about the structure of a reactant for both reactions to form a single product?
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