Question

How can I draw \[cis-2-octene\] according to IUPAC?

Answer 1

Hint: To answer this question we firstly should know the correct process in order to name an organic compound by the following norm of IUPAC nomenclature. Then we should know about the difference between cis as well as trans organic molecule then we only could give correct IUPAC of given compound.

Complete step-by-step answer:We should firstly correct to now about that is it cis or trans isomerism. Then we also should know about geometric isomerism. So now we will understand that is it cis-trans isomerism in a simple way. We should note that the cis indicate that the functional group are either on same side of a carbon chain meanwhile trans convey that the functional groups is opposing side of carbon chain.

So, by looking at compound that is given in question i.e. \[cis-2-octene\] we should note the group is present on opposite side. Thus from this we can easily say this is cis structure. The structure with the correct numbering of carbon atoms is presented above.
Since cis stereoisomer must have two hydrogen atom on same side of bond and actual bond lines notation for cis-2-octene will be.

So, by looking at the above structure now we know the correct name of the organic compound. The correct answer of given organic compound in IUPAC is \[cis-2-octene\].

Note: We should know to select the longest chain of carbon atoms in a molecule. We should note that when chains of equal lengths are competing for selection then we should select that chain which has more number of substituent.