Final answer:
A ketone has two hydrocarbon groups bonded with the carbonyl carbon. By following the steps for naming ketones, the structures for each compound can be deduced. For example, 5-bromo-3-iodoheptanal has a 7-carbon chain with a bromine atom attached at the 5th carbon and an iodine atom attached at the 3rd carbon.
Step-by-step explanation:
A ketone has two hydrocarbon groups bonded with the carbonyl carbon, i.e., R-C-R' group. The structure for each compound can be deduced by following the steps for naming ketones. Let's consider the given examples:
a. 5-bromo-3-iodoheptanal: This ketone has a 7-carbon chain with a bromine atom attached at the 5th carbon and an iodine atom attached at the 3rd carbon.
b. 5-bromo-4-ethyl-2-heptanone: This ketone has a 7-carbon chain with a bromine atom attached at the 5th carbon, an ethyl group attached at the 4th carbon, and a carbonyl group (C=O) attached at the 2nd carbon.