ChemistryAdvancedHigh School (11–12)Organic Chemistry: Some Basic Principles and Techniques › Classification, IUPAC Nomenclature and IsomerismNEETJEE Main
Created by StemPy LabA student lists every aldehyde and every ketone with the molecular formula . He counts structural isomers only, not stereoisomers. He draws the straight chain of five carbons and every branched chain, and places the carbonyl group in each possible position, taking care not to count one compound twice under two names. How many aldehydes and how many ketones should his list contain?
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← The figure shows four pairs of compounds, A to D, drawn as bond-line formulas. The two compounds of each pair have the same molecular formula. Match each pair in List-I with the kind of structural isomerism it shows in List-II.
List-I (Pair)
A. Pair A, first row of the figure
B. Pair B, second row
C. Pair C, third row
D. Pair D, fourth row
List-II (Kind of isomerism)
I. Functional group isomerism
II. Chain isomerism
III. Metamerism
IV. Position isomerismA teacher discusses the reactive species formed when a covalent bond breaks. Two statements about them are given below. Statement I: Alkyl free radicals become more stable from primary to secondary to tertiary, so the tert-butyl radical, (CH₃)₃Cᵇᵘˡˡᵉᵗ, is more stable than the ethyl radical, and the methyl radical is the least stable alkyl radical. Statement II: In the carbanion CH₃⁻, the carbon atom is sp² hybridised and the ion is planar, just like the methyl carbocation. →
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