![]() ![]() Since the alcohol has a lower priority, the prefix hydroxyl- will be added to the name.Ĭ) Alkenes and alkynes are never written as a prefix, they are always in the suffix. The aldehyde has a higher priority and is therefore the primary functional group of the molecule and determines that the suffix of the name will be –al. This molecule contains two functional groups, an aldehyde (in red) and an alcohol (in blue). The other functional groups (if present) will be written as a prefix. This group will be used to determine the suffix of the name. In the example below, the primary functional group is highlighted in red. It is an alkane and will have the suffix –ane.ī) When there is more than one functional group present in a molecule, the group with the highest priority is usually the most oxidized one (see Appendix I for a complete list). This molecule contains only carbon-carbon and carbon-hydrogen bonds and therefore does not have a functional group. A) Determine the primary functional group of the molecule.
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