Question

Be sure to answer all parts. 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?.

Answer 1

Neopentane makes up component A, while n-pentane makes up compound B.

First and foremost, it is important to understand that compounds A and B are isomers and alkanes of pentane. Compounds with distinct structural formulas but the same molecular formula are known as isomers.

When heated with Cl2, compound A now produces a single monochlorination product, demonstrating the molecule's high degree of symmetry. Neopentane must be this chemical (image 1).

Upon monochlorination, compound B divides into three constitutional isomers.

A halogen atom is replaced with another substance in a process known as halogenation, where the halogen atom eventually becomes a component of the new substance or compound. In general, one or more halogens are typically added to the chemical during the halogenation reaction.

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Answer 2

Neo-pentane represents the Compound A while compound B is n-pentane.

After careful consideration we can say that compounds A and B are alkanes and also isomers of pentane. In chemistry, Isomers are defined as compounds having same empirical molecular formula but different structural formulas due to varying arrangement of atoms.

Now, as per the question statement, compound A gives a single monochlorination product upon heating with the molecule of chlorine i.e. Cl2 showing that the molecule is extremely symmetric. This molecule must be neo-pentane. Refer to image 1.

Similarly, Compound B forms 3 constitutional isomers after undergoing monochlorination. This compound must be n-pentane since three are 3 different types of carbon atoms in the structure. Refer to image 2.

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