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Longest Chain Rule

Write the IUP...

Question

Write the IUPAC name of the compound $(A)$ which is a $2 - m e t h y l$ alkane with the molecular mass of $72$ .

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Solution

Since it is an alkane $(C_{n} H_{2 n + 2})$ ,
$∴ 12 n + 2 n + 2 = 72$
The compound $(A)$ is $5 C - a t o m$ alkane with $(M e)$ group at $C - 2$ . The structure of $(A)$ is as shown.

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