IUPAC Nomenclature Essentials

IUPAC Order:

$$\text{Secondary Prefix + Primary Prefix + Word Root + Primary Suffix + Secondary Suffix}$$

Functional Group Priority Order:

$$\text{--COOH} > \text{--SO}_3\text{H} > \text{--COOCO--} > \text{--COOR} > \text{--COCl} > \text{--CONH}_2 > \text{--CN} > \text{--CHO} > \text{--C(=O)--} > \text{--OH} > \text{--NH}_2 > \text{--C=C--} > \text{--C}\equiv\text{C--}$$

Carbon Skeleton Classification:

• $$1^\circ$$ (Primary): Carbon attached to $$1$$ other carbon.
• $$2^\circ$$ (Secondary): Carbon attached to $$2$$ other carbons.
• $$3^\circ$$ (Tertiary): Carbon attached to $$3$$ other carbons.
• $$4^\circ$$ (Quaternary): Carbon attached to $$4$$ other carbons.