it could be: ethyl benzene or phenyl ethane. Both are correct but examiners may be picky and demand one and not the other. I think the safest option is to use IUPAC. BUT when do I use phenyl- and when do I use -benzene (e.g: phenyl amine or chlorobenzene)??
what do you mean use phneyl when it can be reated as a side-chain surely in phenyl amine the AMINE group is a side chain NOT phenyl??
The amine will be the functional group, as it's the most reactive bit... the benzene ring won't take part in the reaction so is treated as a side-chain.
The amine will be the functional group, as it's the most reactive bit... the benzene ring won't take part in the reaction so is treated as a side-chain.
but in benzoic acid, the acid takes part so it should be pheyl methanoic acid? but it is not
see this is why it is confusing -NH2 is a substituent but it is phenyl amine???
It's all to do with priority. Groups with priority get the suffix.
Amines have a greater priority, so they get the suffix. Out of amines and benzene rings, benzene rings have less priority, so they get the prefix, phenyl-.
Hence, it's phenylamine.
According to IUPAC, calling it aminobenzene is wrong.
However, halogens have less priority than benzene rings, so they get the prefix, and benzene rings get the suffix, -benzene.
It's all to do with priority. Groups with priority get the suffix.
Amines have a greater priority, so they get the suffix. Out of amines and benzene rings, benzene rings have less priority, so they get the prefix, phenyl-.
Hence, it's phenylamine.
According to IUPAC, calling it aminobenzene is wrong.
However, halogens have less priority than benzene rings, so they get the prefix, and benzene rings get the suffix, -benzene.