Question

IUPAC name of the compound ?

• A. hexanoic acid 5 - al - 1
• B. 6-oxohexanoic acid
• C. hexanal-1-carboxylic acid
• D. none of these

Answer 1

The correct option is B 6-oxohexanoic acid

Following steps are followed while naming the compound; $CHO-(C{H}_2{)}_{6}COOH$:
i) The parent chain consists of 8 carbon atoms and the primary functional group is;$-COOH$ , thus the suffix -oic acid is used.
ii)$-CO$ is the secondary functional group and the prefix -oxo is used for it.
iii) The numbering of the compound is done from right to left as the lowest number is given to the primary functional group; $-COOH$.
Thus the name of the compound is; 6-oxohexanoic acid.