Revision Notes for JEE Chemistry: Organic Chemistry Mixed Topics
Review targeted revision notes for JEE Chemistry with the JEE Chemistry Organic Chemistry Mixed Topics Notes Set 01. Built according to official educational guidelines for the 2026-27 academic year, these downloadable summaries for Organic Chemistry Mixed Topics support daily study and last-minute exam readiness.
Review Organic Chemistry Mixed Topics for JEE Chemistry
Access the complete concept summary PDF for Organic Chemistry Mixed Topics below. Regular review of these targeted notes builds familiarity with complex JEE Chemistry themes and helps secure higher marks in final school evaluations.
Nomenclature
1. Choose the principal functional group by priority (acid, ester, amide, nitrile, aldehyde, ketone, alcohol, amine). It takes the lowest locant and appears as the suffix; other groups are prefixes.
2. SH as a substituent is called mercapto or sulfanyl. For \(\ce{HOCH2CH(SH)CH2SH}\) the name is 2,3-dimercaptopropan-1-ol.
3. \(\ce{(CH3)2CHCN}\) is 2-methylpropanenitrile, also called isopropyl cyanide or isobutyronitrile.
4. Carboxylic acid series: formic, acetic, propionic, butyric, valeric. The amide of crotonic acid is crotonamide.
Isomerism and Hybridisation
1. A chiral carbon has four different groups. A plane of symmetry rules out optical activity.
2. Fischer projections: a meso compound and a chiral stereoisomer of the same constitution are diastereomers.
3. E/Z: assign CIP priorities on each alkene carbon. Higher priorities on the same side give Z, on opposite sides give E.
4. A double bond in a six-membered ring cannot be trans, but two substituents on different ring carbons can be cis or trans.
5. Carbons with three sigma bonds are \(sp^2\), with two are sp. Count a triple bond as 1 sigma and 2 pi bonds.
6. Secondary amines of formula \(\ce{C4H11N}\): three structural isomers.
Reactions
| Reaction | Point to remember |
|---|---|
| Aldol condensation of cyclohexanone | aldol addition, then loss of water on heating gives the conjugated enone |
| Hydrogenation over Pd/C at 1 atm | reduces C=C in preference to C=O |
| Intramolecular Cannizzaro of phthalaldehyde | hydroxy acid, which closes to the lactone phthalide on heating with acid |
| Gabriel phthalimide synthesis | gives primary aliphatic amines only |
| Carbylamine test | primary amine with chloroform and KOH gives an isocyanide with a foul smell |
| Sucrose | non-reducing sugar, because no free anomeric group is left |
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