Question

What is the IUPAC name for the following compound?

1) -2-Bromo-4-pentylhexane
2) -(2S,4S)-2-Bromo-4,5-diethylheptane
3) -3,4-Diethyl-6-bromoheptane
4) -2-Bromo-4-methylhexane
5) -(2R,4R)-2-Bromo-4,5-diethylheptane

Answer 1

The IUPAC name for a compound is determined by its longest carbon chain, substituent types and positions, and stereochemistry. Names like 2-bromopentane and 4-bromo-2-methylhexane follow these rules, with prefixes indicating specific optical isomerism when necessary.

Step-by-step explanation:

The IUPAC name for a compound can be determined by identifying the longest carbon chain, the types of substituents, their positions, and stereochemistry if relevant. For example:

• 2-bromopentane is the name for a compound with a pentane (five-carbon) chain and a bromine atom attached to the second carbon atom.
• For a molecule like 4-bromo-2-methylhexane, the parent chain is hexane (six carbons), with a bromo group on the fourth carbon and a methyl group on the second carbon.

The IUPAC naming system also has rules for indicating the geometric or optical isomerism when needed, as specified with prefixes like (2S,4S) or (2R,4R).

Similarly, compounds with multiple substitutions follow specific naming rules, which include numbering the chain to give the lowest possible numbers to the substituents and listing substituents in alphabetical order.