[Nitin_Naudiyal]

Please help me with the IUPAC nomenclature of the two mentioned compounds.

Please Find Attachment containing the structure of the two compounds.

Thank You

[discodermolide]

The first one is a ring and you do not have this in the name, your name refers to a straight chain system.
The second one is named from the parent acid.
Can you have another go at it?

[Nitin_Naudiyal]

2,4-dichlorocyclopentanone

2-propylbenzenoate ( is benzoic acid the parent acid ? )

[Dan]

2,4-dichlorocyclopentanone

Looks ok

2-propylbenzenoate ( is benzoic acid the parent acid ? )

Close, benzoic acid becomes benzoate (not benzenoate).

But, 2-propylbenzoate is this:


Your name implies that you have benzoate substitutes at the 2-position with a propyl group.

Hint: Name this:

[Nitin_Naudiyal]

Hint: Name this:

is it Methyl Ethanoate.

Can the Second compound be named as IsopropylBenzoate?

[Dan]

is it Methyl Ethanoate.

Can the Second compound be named as IsopropylBenzoate?

You need the space - as you have in methyl_ethanoate.

It is isopropyl benzoate, IUPAC: propan-2-yl benzoate

[Nitin_Naudiyal]

Thank You Dan.

But, i have few doubts.

The IUPAC nomenclature for Esters is Alkyl Alkanoate.
So, the branch should be Propyl, why is it written as Propan-yl.

[Dan]

So, the branch should be Propyl, why is it written as Propan-yl.

Propyl and propan-2-yl are both alkyl groups, I do not see the contradiction.

Propyl does not specify whether you mean propan-1-yl or propan-2-yl. Usually "propyl" is assumed to be propan-1-yl.

According to the IUPAC blue book, it will be propan-2-yl benzoate.

[Nitin_Naudiyal]

Ok.

Thank You Dan for your Help.

Many Thanks