How do you name aldehydes?

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Answer 1 · 2016-03-01T19:05:29

You follow two rules.

The name of the alkane is formed by replacing the final #color(red)("–e")# of the name of the parent alkane with #color(red)("–al")#.
The carbon atom in the aldehyde group is automatically #1, so the "1" is not included in the name.

Examples

#"CH"_3"CH"_2"CH"_2"CHO"# is butanal.

#"CH"_3"CHBrCH"_2"CHO"# is 3-bromobutanal.

#"C"_6"H"_5"CHClCH"_2"CHO"# is 3-chloro-3-phenylpropanal.