What you’ll learn6 learning objectivesChoose one objective for a focused lesson, or study the complete topic.13.4.1Structural isomerism and its division• Describe structural isomerism and its division into chain, positional and functional group isomerismSyllabus objective13.4.2Stereoisomerism and its division• Describe stereoisomerism and its division into geometrical (cis/trans) and optical isomerism (use of E/Z nomenclature is acceptable but is not required)Syllabus objective13.4.3Geometrical (cis/trans) isomerism in alkenes,• Describe geometrical (cis/trans) isomerism in alkenes, and explain its origin in terms of restricted rotation due to the presence of π bondsSyllabus objective13.4.4Chiral centres and enantiomers• 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.)Syllabus objective13.4.5Chiral centres and geometrical (cis/trans)• Identify chiral centres and geometrical (cis/trans) isomerism in a molecule of given structural formula, including cyclic compoundsSyllabus objective13.4.6The possible isomers for an organic molecule• Deduce the possible isomers for an organic molecule of known molecular formulaSyllabus objective