Question

The correct IUPAC name of the following structure is

• A. 3-(1,2,3-trisketone)-propan-1-methanal
• B. 2,3-dimethyl-7-oxo-5,6,7-triheptanone
• C. 5,6-dimethyl-7-oxo-1,2,3-triheptanone
• D. 2,3-dimethyl-4,5,6-trioxoheptanal

Answer 1

The correct option is D 2,3-dimethyl-4,5,6-trioxoheptanal

Here two functional groups, aldehyde and ketone are present. Aldehyde gets the higher priority and the suffix (-al) is used.
The longest C chain of 7 atoms is chosen.
Numbering starts from principal functional group i.e. aldehyde.
If 3 same functional groups are present then prefix 'tri' is used.
Ketone has the prefix (-oxo)


The correct IUPAC name is 2,3-dimethyl-4,5,6-trioxoheptanal