5 Full Lesson Bundle which covers the lessons on aromatic compounds from the OCR A Level Chemistry Specification. See below for the lesson objectives
Lesson 1: Benzene and its Structure
- To describe the Kekulé model of benzene
- To describe the delocalised model of benzene in terms of P orbital overlap forming a delocalised π system
- To compare the Kekulé model of benzene and the delocalised model of benzene
- To explain the experimental evidence which supports the delocalised model of benzene in terms of bond lengths, enthalpy change of hydrogenation and resistance to reaction
Lesson 2: Naming Aromatic Compounds
- State the IUPAC name of substituted aromatic compounds
- Construct the structure of aromatic compounds based on their IUPAC names
- Analyse the correct numbering system for di and trisubstituted aromatic compounds
Lesson 3: The Reactions of Benzene
- To understand the electrophilic substitution of aromatic compounds with:
(i) concentrated nitric acid in the presence of concentrated sulfuric acid
(ii) a halogen in the presence of a halogen carrier
(iii) a haloalkane or acyl chloride in the presence of a halogen carrier (Friedel–Crafts reaction) and its importance to synthesis by formation of a C–C bond to an aromatic ring - To construct the mechanism of electrophilic substitution in arenes
Lesson 4: Phenols
- To recall and explain the electrophilic substitution reactions of phenol:
with bromine to form 2,4,6-tribromophenol
(ii) with dilute nitric acid to form a mixture of 2-nitrophenol and 4-nitrophenol
(j) To explain the relative ease of electrophilic substitution of phenol compared with benzene, in terms of electron pair donation to the π-system from an oxygen p-orbital in phenol - To understand the weak acidity of phenols shown by its neutralisation reaction with NaOH but absence of reaction with carbonates
Lesson 5: Directing Groups in Aromatic Compounds
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To understand the 2- and 4-directing effect of electron- donating groups (OH, NH2) and the 3-directing effect of electron-withdrawing groups (NO2) in electrophilic substitution of aromatic compounds
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To predict the substitution products of aromatic compounds by directing effects in organic synthesis
Declaimer: Please refrain from purchasing this popular resource for an interview lesson or a formal observation. This is because planning your own lessons including using your own lesson PowerPoints is a fundamental skill of a qualified/unqualified teacher that will be reviewed during these scenarios outlined above
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