Question

Name the following compounds. I know the first two but the third one im not sure of. Can anyone help me?

Answer 1

Concepts and reason

IUPAC nomenclature is used to give the scientific name of a compound to be used worldwide. Some rules and principles needs to be followed while writing the IUPAC name of any compound. Identify the longest carbon chain and the functional group present in the compound and name them accordingly for writing its IUPAC name.

Fundamentals

Firstly, identify the longest carbon chain and write it at the end of the name of the compound, that is, the root name of the chain. If the chain contains double bond or triple bond then, the suffix -ene or -yne will be added accordingly.

Secondly, find the functional group present in the compound and locate its point of attachment on the carbon chain. It will form the prefix of the name.

The given structure of the compound is shown below.

Name of the longest carbon chain, that is, the root name is but.

Name the straight chain containing four carbon atoms containing a double bond present at carbon 1.

The suffix is ene.

Only one substituent is present on the longest chain, that is, a phenyl group.

Therefore, the prefix added to the name is, 2-phenyl. So, the name of this compound is 2-phenyl-1-butene.

Ans:

The IUPAC name of the given structure is 2-phenyl-1-butene.