Draw the structure of 3,6-diethyl-2,8-dimethyl-4-decyne.

Solution:- The given name is 3,6-diethyl-2,8-dimethyl-4-decyne. The number of parent carbon chain are written at the end along with the suffix for the multiple bond or the functional group.

Looking at the given name, there is dec at the end which stands for 10 carbons chain. Also, the suffix used is -yne which is used for a triple bond between carbon atoms. Since it says 4-decyne, it states that the triple bond is at 4th position in the parent carbon chain.

3,6-diethyl states two ethyl groups at number 3 and number 6 carbons and 2,8-dimethyl states two methyl groups at number 2 and number 8 carbons.

Remember that the numbering is started from the side to which the multiple bond is closer and the substituents are written in alphabetic order. Since the e of ethyl comes before m of methyl, the ethyl groups are written before methyl groups in the naming and while doing this the prefixes like -di or -tri etc are not considered. So, the structural formula of the compound will be: