What is name of this according to the IUPAC:
a benzene that has an ethyl group on an its carbon , and a double methyl group on another carbon ?
thanks
You can't have that without having a 5-valent carbon and that isn't allowed.
Yes , that's quite right , I actually meant a hexane that has an ethyl group on an its carbon and a double methyl group on another carbon ?
with my best respects
First, the name depends upon where the groups are located. If that is a straight chain hexane, then the ethyl group is named first followed by the number and dimethyl as in
3-ethyl-2,2-dimethyl hexane.
Here is a well illustrated site.
http://www.kentchemistry.com/links/organic/orgonaming1.htm
To name the compound according to the IUPAC nomenclature, you need to follow a set of rules. Let's break down the given compound and determine its IUPAC name step by step.
1. Identify the longest carbon chain that includes the substituent groups. In this case, the benzene ring is the longest carbon chain.
2. Number the carbon atoms in the benzene ring starting from one of the substituents. It is usually done to assign the lowest possible numbers to the substituents. In this case, we start numbering from the ethyl group.
```
1 2 3 4 5
| | | | |
CH3-CH2- -C6H4- -C6H4- -C6H4- -C6H4-
| | | | |
Ethyl Methyls Benzene
```
3. Name the substituent groups. The ethyl group is named as "ethyl," and the double methyl group is named as "dimethyl."
4. Write the substituent names as prefixes with the carbon number they are attached to. In this case, we have an ethyl group attached to carbon 1 and two methyl groups attached to carbon 3 and carbon 5.
```
1 2 3 4 5
| | | | |
CH3-CH2- -C6H4- -C6H4- -C6H4- -C6H4-
| | | | |
Ethyl Methyls Benzene
```
5. Combine the prefix and the main chain name. The ethyl group goes before the benzene name, so we have "ethylbenzene."
6. Indicate the position of substituents using numbers separated by commas. In this case, we have methyl groups on carbon 3 and carbon 5. Therefore, the IUPAC name for the compound is "3,5-dimethylethylbenzene."
Thus, the IUPAC name for the given compound, a benzene with an ethyl group on one carbon and a double methyl group on another carbon, is 3,5-dimethylethylbenzene.