Propanone, $$$\mathrm{CH}_{3} \mathrm{COCH}_{3}$$$, is an important organic reagent. Fig. 4.1 shows some reactions of propanone and its derivatives. Fig. 4.1 State what is observed in reaction 4. .........................................................................................................................................

Chemistry

IGCSE&ALevel

CAIE

Exam No：9701_w24_qp_21 Year：2024 Question No：4(d)

Answer:

Knowledge points:

13.4.1 describe structural isomerism and its division into chain, positional and functional group isomerism

13.4.2 describe stereoisomerism and its division into geometrical (cis/trans) and optical isomerism (use of E, Z nomenclature is acceptable but is not required)

13.4.3 describe geometrical (cis/trans) isomerism in alkenes, and explain its origin in terms of restricted rotation due to the presence of π bonds

13.4.4 explain what is meant by a chiral centre and that such a centre gives rise to two optical isomers (enantiomers) (Candidates should appreciate that compounds can contain more than one chiral centre, but knowledge of meso compounds, or nomenclature such as diastereoisomers is not required)

13.4.5 identify chiral centres and geometrical (cis/trans) isomerism in a molecule of given structural formula including cyclic compounds

13.4.6 deduce the possible isomers for an organic molecule of known molecular formula

Answer:

Knowledge points:

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