When (1R, 2R) - 1-chloro-2-methylcyclohexane is heated with NaOCH3, the predominant product is ... ?

A. 3-methylcyclohex-1-ene (racemic)

B. methylcyclohexene

C. (1S, 2R) - 1-methoxy-2-methylcyclohexane

D. (S) - 3-methylcyclohex-1-ene

E. (R) - 3-methylcyclohex-1-ene

F. (1R, 2R) - 1-methoxy-2-methylcyclohexane

Answer: The correct answer is option E.

Explanation:

When (1R, 2R) - 1-chloro-2-methylcyclohexane is heated with a strong base such as NaOCH3, the predominant product will be an alkene.

It is important to note that when such compounds undergo elimination as a result of heat, the resultant product is usually an alkene.

The available options are:

A. 3-methylcyclohex-1-ene (racemic)

B. methylcyclohexene

C. (1S, 2R) - 1-methoxy-2-methylcyclohexane

D. (S) - 3-methylcyclohex-1-ene

E. (R) - 3-methylcyclohex-1-ene

F. (1R, 2R) - 1-methoxy-2-methylcyclohexane

The correct answer is E.

Therefore, the compound will undergo elimination reaction to give an alkene (. (R) - 3-methylcyclohex-1-ene).