[PDF] chemguide naming organic compounds 2 answers

How do you make a naming organic compound?

NAMING ORGANIC COMPOUNDS: 2 Work it out as if it was 2,3-dimethylbutanoic acid, but remember to turn it into the salt by replacing the right-hand hydrogen by an ionic bond with sodium ions. Don't leave this rather complicated example until you are sure that you can see how the structure fits the name.

Can a molecule with 4 carbons take more than one structural form?

Those with 4 or more carbons can take more than one structural form. The CH 3 group can be thought of as a methane molecule, CH 4, which has lost a hydrogen atom. It is called a methyl group. The name of this compound is 2-methylpropane.

Which molecule has 5 carbons with no carbon-carbon double bonds?

In B, the longest chain has 5 carbons (pent) with no carbon-carbon double bonds (an). There is a methyl group on the number 2 carbon. The molecule is 2-methylpentane. (4-methylpentane is wrong. You number in such away as to get the smallest numbers in the name.) In C, the longest chain has 4 carbons (but) with no carbon-carbon double bonds (an).

How many methyl and ethyl groups are in a carbon atom?

This time there are two different alkyl groups attached - an ethyl group on the number 3 carbon atom and a methyl group on number 2. Note: Once again it doesn't matter whether the ethyl and methyl groups point up or down. You might also have chosen to start numbering from the right-hand end of the chain.