Final answer:
To draw the structure of 4-ethyl-3,4-dimethyloctane, we start by drawing the eight-carbon parent chain and then add the methyl and ethyl groups in the correct positions.
Step-by-step explanation:
4-ethyl-3,4-dimethyloctane
To draw the structure of 4-ethyl-3,4-dimethyloctane, we start by drawing the eight-carbon parent chain:
CH3 - CH - CH - CH - CH - CH - CH - CH3
Next, we add a methyl group (CH3) at the third carbon:
CH3 - CH - CH(CH3) - CH - CH - CH - CH - CH3
Finally, we add an ethyl group (CH2CH3) at the fourth carbon:
CH3 - CH - CH(CH2CH3) - CH - CH - CH - CH - CH3
This is the structure of 4-ethyl-3,4-dimethyloctane.