V shows stereoisomerism. (i) Explain what is meant by stereoisomerism. ....................................................................................................................................... . ....................................................................................................................................... . ................................................................................................................................. (ii) Deduce the number of stereoisomers of $$$\mathbf{V}$$$. Explain your reasoning. ....................................................................................................................................... . ....................................................................................................................................... . ................................................................................................................................. (iii) Deduce the molecular formula of $$$\mathbf{V}$$$. ................................................................................................................................. (iv) Name all the functional groups present in $$$\mathbf{V}$$$. ....................................................................................................................................... . .................................................................................................................................

Chemistry

IGCSE&ALevel

CAIE

Exam No：9701_s24_qp_21 Year：2024 Question No：6(a)

Answer:

Knowledge points:

13.1.1 define the term hydrocarbon as a compound made up of C and H atoms only

13.1.2 understand that alkanes are simple hydrocarbons with no functional group

13.1.3 understand that the compounds in the table on page 26 and 27 contain a functional group which dictates their physical and chemical properties

13.1.4 interpret and use the general, structural, displayed and skeletal formulae of the classes of compound stated in the table on page 26 and 27

13.1.5 understand and use systematic nomenclature of simple aliphatic organic molecules with functional groups detailed in the table on page 26 and 27, up to six carbon atoms (six plus six for esters, straight chains only for esters and nitriles)

13.1.6 deduce the molecular and/or empirical formula of a compound, given its structural, displayed or skeletal formula

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:

Solution:

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