The Newman projection given below corresponds to the compound

Option (a). Explanation: The given molecule is cis-decalin in Newman projection, if we number the carbon atoms of both the rings, as shown below. Here, C₄, C₆ and C₉ are representing carbon on the backside of C₃, C₁ and C₈ respectively. On converting the above conformation into chair form, we get: The above chair-form can be converted into bicycle form as follows:

Q58 · CSIR NET Chemistry, June 2021

Paper: CSIR NET June 2021 · Subject: Organic Chemistry · Chapter: Stereochemistry · Topic: Stereochemistry – General · Marks: 2 · Difficulty: Medium

The Newman projection given below Question structure, ABC26OR1102

corresponds to the compound

(a)

(b)

(c)

(d)

Answer

Answer (as printed): A

Explanation

The given molecule is cis-decalin in Newman projection, if we number the carbon atoms of both the rings, as shown below. Here, $\mathrm{C_{4}}$, $\mathrm{C_{6}}$ and $\mathrm{C_{9}}$ are representing carbon on the backside of $\mathrm{C_{3}}$, $\mathrm{C_{1}}$ and $\mathrm{C_{8}}$ respectively. On converting the above conformation into chair form, we get: The above chair-form can be converted into bicycle form as follows:

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