§-Quick questions
TASChemistryUnit 4: Structure, Synthesis and Design
Quick questions on Nomenclature and isomerism: TCE Chemistry (Tasmania)
2short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What are iUPAC naming rules?Show answer
Build the name in three parts:
What are priority of functional groups?Show answer
When a molecule contains more than one functional group, only one is the principal group (named as the suffix) and the others become prefixes. A simplified priority order, highest first, is: carboxylic acid, then ester, then aldehyde, then ketone, then alcohol, then amine. For example, a compound containing both a hydroxyl and a carboxyl group is named as a hydroxy-substituted acid (the acid takes the suffix), as in 2-hydroxypropanoic acid (lactic acid). Getting the priority right ensures the chain is numbered to give the most senior group the lowest locant.
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