medhelp
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in terms of naming
when it benzene seen as a substituent and the prefix phenyl is used instead?
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SANTR
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(Original post by medhelp)
in terms of naming
when it benzene seen as a substituent and the prefix phenyl is used instead?
It is referred to as 'phenyl', when it is the substituent group of another molecule. For example 'phenyl' ethanone.
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medhelp
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(Original post by SANTR)
It is referred to as 'phenyl', when it is the substituent group of another molecule. For example 'phenyl' ethanone.

yeah but how do you know WHEN its a substituent

for all we know that other molecule could be a substituent of benzene?
like when benzene has chlorine on it - it's not phenyl is it
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charco
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(Original post by medhelp)
yeah but how do you know WHEN its a substituent

for all we know that other molecule could be a substituent of benzene?
like when benzene has chlorine on it - it's not phenyl is it
If there is another functional group that can be named as a suffix the phenyl becomes a prefix. If the other functional gropup is named as a prefix then the benzene becomes a suffix.

nitrobenzene
chlorobenzene
methoxybenzene

and

phenylamine
phenol

However, be aware that carbonyl attached to benzene converts it to benzoyl (old money) or benzenecarbonyl (new money)

benzenecarboxylic acid
benzenecarbaldehyde
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