Naming functional groups

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Naming functional groups

Postby 204623782 » Sat Mar 05, 2016 11:45 am

When it's presented as CH3CH2CHO, like just written out like that, I have a hard time identifying the functional group. Is there an easy way to tell, or does it just come with practice?

Rex Lee 1C
Posts: 48
Joined: Fri Sep 25, 2015 3:00 am

Re: Naming functional groups

Postby Rex Lee 1C » Sat Mar 05, 2016 12:15 pm

What's important in this structural formula is the ending -CHO. This implies that there is an oxygen and hydrogen attached to a carbon which is attached to the rest of the chain. However, since this is only 3 bonds and to get carbon a formal charge of zero, we double bond the oxygen. Now it is clear that this is an aldehyde group, the compound being propanal.


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