Question

Draw the structural diagram for each of the following organic compounds:
1. Butanal
2. Pent-2-yne
3. The isomer of n-butane

Hint:

Carbon always forms 4 bonds. When drawing structures, double-check that every carbon atom has exactly 4 lines (bonds) connected to it!

Answer 1

1. Butanal: Butanal is an aldehyde with 4 carbon atoms. The functional group is -CHO. [ CH_3-CH_2-CH_2-CHO ] 

2. Pent-2-yne: Pent-2-yne is an alkyne with 5 carbon atoms and a triple bond starting at the second carbon atom. [ CH_3-Cequiv C-CH_2-CH_3 ] 

3. Isomer of n-butane (Iso-butane / 2-Methylpropane): n-butane is a straight chain of 4 carbons. Its only structural isomer is a branched chain where 3 carbons form the main chain and 1 carbon is a methyl branch. [ CH_3-CH(CH_3)-CH_3 ]