Question

Please tell the IUPAC name of the bond line notation given in image!!!!​

Answer 1

The molecule contains an -OH (Hydroxyl) group, so it is an alcohol and its suffix will be -ol.

Refer to the complete diagram I have attached below.

The numbering of the molecule must be done in such a way that the Hydroxyl group gets the lowest number possible and also the longest carbon chain is considered.

So, numbering must be done from the branch on the left, such that the Carbon attached to the Hydroxyl gets the numbering 2.

If we number like this, we get the longest carbon chain of 8 atoms.

=> So, the root word is octa.

The two substituents are Methyl and Ethyl attached to Carbons 5 and 6.

=> 6-Ethyl-5-methyl

The Hydroxyl group is attached to Carbon 2.

=>so the complete suffix will be 2-ol.

The double bonds are present at Carbons 3 and 6 respectively.

=> 3,6-dien

So, the IUPAC name will be: 6-Ethyl-5-methylocta-3,6-dien-2-ol .

Note: The "a" is added after the "oct" to give "octa" because a vowel has to be present here as "dien" does not provide a vowel.