Question

The common name of this compund is Sec-Propyl chloride

but the definition of sec group states that second last Carbon atom in the chain should be branched to one —CH3 group

In the structure the second last Carbon is branched to Cl
So how can we use sec in name?​

Answer 1

Answer:

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Answer 2

Answer:

The common name is correct

Explanation:

For sec the alpha carbon should be attached to 2 other carbon atoms hence we can use sec in this because the carbon numbered 2 is attached to 1 and 3

But it would be better to use the name isopropyl chloride in this case since it gives more clarity
For using iso, the carbon chain must have 1 alkyl group attached to it which is not part of the main chain