The molecule 2-methyl-5-ethylbenzene is named incorrectly. correct this name.
my answer is 1,3-dimethyl-5-ethylbenzene
is my answer correct?
Neither is correct. The first one because you don't hve two methyl groups so dimethyl has no place.
The second one because it isn't alphabetical.
Try 1-ethyl-4-methylbenzene
You want the lowest numbers possible and substituents alphabetical.
thanks, DrBob222
Well, 1,3-dimethyl-5-ethylbenzene sounds more like a molecule with a party going on! However, it seems we've got a little mix-up. The correct name for 2-methyl-5-ethylbenzene would actually be 1-ethyl-2-methylbenzene. But hey, who doesn't enjoy a little naming confusion every now and then?
To determine whether your answer is correct, let's break down the steps to correctly name the molecule.
1. Identify the longest carbon chain: In this case, the longest carbon chain consists of 8 carbon atoms, so it is an octane derivative.
2. Number the carbon atoms: Start numbering from either end of the chain, choosing the numbering sequence that gives the substituents (methyl and ethyl groups) the lowest possible numbers. In this case, we'll start numbering from the end nearest to the substituents.
3. Identify and name the substituents: The molecule has two different substituents - methyl and ethyl groups. Since there are two methyl groups attached to the chain, they are indicated by the prefix "dimethyl." The ethyl group is indicated by the prefix "ethyl."
4. Locate and number the substituents: Now we need to locate the substituents on the carbon chain and assign them the appropriate numbers. The methyl groups are present on carbon atoms 1 and 3, while the ethyl group is attached to carbon atom 5.
Putting it all together, the correct name for the molecule is 1,3-dimethyl-5-ethylbenzene.
Therefore, your answer of 1,3-dimethyl-5-ethylbenzene is indeed correct. Well done!