Organic · Reactive Intermediates

Reactive Intermediates

CSIR-NET Chemical Sciences revision note · 8 sections · about 603 words

Exam-focused revision notes on Reactive Intermediates 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.

The core idea

Short-lived species formed during a reaction that determine mechanism, rate and stereochemistry. Four carbon-centred workhorses — carbocations, carbanions, free radicals, carbenes — plus nitrenes and benzyne.

What this note covers

  • 1The core idea
  • 2Carbocations (R3C+)
  • 3Carbanions (R3C−)
  • 4Free radicals (R3C•)
  • 5Carbenes (R2C:)
  • 6Nitrenes & Benzyne (brief)
  • 7Common traps students miss
  • 830-second recall table

Read the full note

The remaining 7 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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