Question

Main Products formed during a reaction of 1-methoxy naphthalene with hydroiodic acid are:
A.
and CH₃I

B.
and CH₃OH

C.
and CH₃OH

D.
and CH₃I

Answer 1

Hint: Here, in this question, 1-methoxy naphthalene is given. It reacts with hydroiodic acid. First of all, hydrogen ions react with 1-methoxy naphthalene followed by iodide ions.

Complete Step by Step Solution:
The structure of 1-methoxy naphthalene is as follows:

1-methoxy naphthalene reacts with hydrogen ion as follows:

Hydrogen ions attack oxygen and bind with oxygen.
It will further react with iodine ion as follows:

The carbon and oxygen bond breaks and iodine ions attack carbon to form methyl iodide.
Therefore, the correct answer is option D.

Additional Information:
The odour of naphthalene, a white, crystalline volatile substance, is often compared to that of mothballs. The substance slowly sublimes (changes from a solid to a gas) at room temperature, producing a vapour that is extremely combustible. The structure of naphthalene can be used to predict how soluble it is in water. A polyatomic hydrocarbon is naphthene. It is a hydrophobic molecule since it contains a lot of carbon atoms. The hydrophobic nature of this naphthalene makes it insoluble in water. The liquid nature of naphthalene is not thoroughly covered in this article. In 1-methoxy naphthalene, there is one hydrogen of naphthalene substituted by the methyl group.

Note: We must keep in mind that hydrogen iodide is a halide of hydrogen and a diatomic molecule. Aqueous solutions of HI are also referred to as hydroiodic acid, a solid acid. Hydroiodic acid and hydrogen iodide, however, are different in that the former is a gas under normal circumstances while the latter is an aqueous gas solution.