Correct structure of γ-methylcyclohexane carbaldehyde is
The Correct Option is A
Solution and Explanation
To determine the correct structure of γ-methylcyclohexane carbaldehyde, we need to understand the nomenclature and the structure it represents.
- Cyclohexane Ring: The base structure is cyclohexane, which is a six-membered carbon ring.
- Carbaldehyde Group: The "carbaldehyde" suffix indicates the presence of an aldehyde group (\text{-CHO}) attached directly to the ring.
- γ-Methyl Substitution: The prefix "γ-methyl" indicates there is a methyl group on the γ-position relative to the aldehyde group. In cyclohexane, positions are labeled as alpha (α), beta (β), and gamma (γ), moving along the carbon chain from the functional group.
Based on these points, the aldehyde group is assigned as position 1. γ-position (third position when counting from the aldehyde group) will have the methyl group.
Hence, the correct structure of γ-methylcyclohexane carbaldehyde is the one depicted in the image above.
Let’s evaluate the given options:
- Option A: Matches with our understanding having the correct positions for -CHO and the γ-methyl group.
- Options B, C, and D: These options do not have the methyl group correctly positioned at the γ-position relative to the aldehyde group, thus do not match the correct IUPAC nomenclature.
Therefore, the correct answer is Option A.
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Concepts Used:
Organic Chemistry – Some Basic Principles and Techniques - Reaction Mechanism
SN1 Reaction Mechanism:
SN1 reaction mechanism takes place by following three steps –
- Formation of carbocation
- Attack of nucleophile
- Deprotonation
SN2 Reaction Mechanism:
The SN2 reaction mechanism involves the nucleophilic substitution reaction of the leaving group (which generally consists of halide groups or other electron-withdrawing groups) with a nucleophile in a given organic compound.
Electrophilic Aromatic Substitution Reaction Mechanism:
The mechanism of an electrophilic aromatic substitution reaction contains three main components which are:
- A new sigma bond from C=C is formed during the reaction in the arene nucleophile.
- Due to the breaking of the C-H sigma bond, a proton is removed.
- The C=C bond is reformed and it restores the aromaticity of the compound.
Electrophilic Substitution Reaction Mechanism:
The electrophilic substitution reaction mechanism is composed of three steps, which will be discussed more below.
- Electrophile Generation
- Carbocation Formation
- Proton Removal