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Dear ma'am/Sir , actually while writing names i was getting stuck ... when we take C3H7 and then aad CHO to it so the name is given by looking at 3 carbons or 4 .. pls help me by providing some more examples regarding this problem .. thanks

Asked by sunakshi 24th October 2013, 9:46 PM
Answered by Expert
Since an aldehyde carbonyl group must always lie at the end of a carbon chain, it is by default position #1, and therefore defines the numbering direction and this number is not included in the name.
Aldehydes take their name from their parent alkane chains. The -e is removed from the end and is replaced with -al. 
So, the IUPAC name of C3H7CHO is butanal.
All the carbon atoms are included in the naming and numbering.
Answered by Expert 25th October 2013, 10:10 AM
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