Organic · IUPAC Nomenclature

IUPAC Nomenclature

CSIR-NET Chemical Sciences revision note · 9 sections · about 547 words

Exam-focused revision notes on IUPAC Nomenclature for CSIR-NET Chemical Sciences, GATE Chemistry and IIT-JAM — the core concepts, the formulas worth memorising, the traps that cost marks, and a quick-recall table.

1. Select the parent (principal) chain

Only one group becomes the suffix — the most senior. Everything less senior is expressed as a prefix.

What this note covers

  • 11. Select the parent (principal) chain
  • 22. Number for lowest locants
  • 33. Seniority of the principal characteristic group
  • 44. Cite substituent prefixes alphabetically
  • 55. Indicating unsaturation
  • 66. Cyclic and polyfunctional naming
  • 77. Stereodescriptors in the name
  • 8Common traps students miss
  • 9Summary table

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The remaining 8 sections — including the worked examples, the common-traps list and the quick-recall table — are part of ChemVidya Full Access, along with 6,000+ practice questions.

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