3.2.5.2 0.6 Explain the difference Students equations for a January 2005 Chelates: Substitution reactions. weeks between and give variety of ligand substitution Unit 5 Q6b examples of monodentate, reactions and identify changes in The different types of bidentate and multidentate coordination number June 2004 ligands. ligands. research the role of haemoglobin in Unit 5 Q4b the Ligand substitution Explain what happens in a June 2002 reactions. ligand substitution reaction Practical activity: Unit 5 Q6 and why there may be a Ligand substitution reactions of Oxygen transport by change in co-ordination copper(II) and cobalt(II) ions. June 2010 haemoglobin. number. Unit 5 Q4 Investigate substitution reactions The chelate effect. Describe what haem is, using bidentate and multidentate how oxygen is carried in ligands in the context of the chelate and why carbon effect. monoxide is toxic. Describe and explain the chelate effect in terms of enthalpy and entropy changes. 3.2.5.3 0.4 Sketch examples of Students draw and make models of June 2011 Knockhardy powerpoint: Shapes of complex weeks octahedral, tetrahedral, complexes including Unit 5 Q6 ions. square planar and linear ones with bidentate ligands and complexes. ones show cis-trans isomerism. January 2011 The shapes of Unit 5 Q4c complexes with 2/4/6 Know how some Explain how optical isomers can ligands. complexes can show form and draw examples. January 2004 (E–Z) or optical Unit 5 Q10b isomerism.
3.2.5.2 Substitution reactions. The different types of ligands. Ligand substitution reactions. Oxygen transport by haemoglobin. The chelate effect. 0.6 weeks Explain the difference between and give examples of monodentate, bidentate and multidentate ligands. Explain what happens in a ligand substitution reaction and why there may be a change in co-ordination number. Describe what haem is, how oxygen is carried in and why carbon monoxide is toxic. Describe and explain the chelate effect in terms of enthalpy and entropy changes. Students equations for a variety of ligand substitution reactions and identify changes in coordination number research the role of haemoglobin in the Practical activity: Ligand substitution reactions of copper(II) and cobalt(II) ions. Investigate substitution reactions using bidentate and multidentate ligands in the context of the chelate effect. January 2005 Unit 5 Q6b June 2004 Unit 5 Q4b June 2002 Unit 5 Q6 June 2010 Unit 5 Q4 Chelates: 3.2.5.3 Shapes of complex ions. The shapes of complexes with 2/4/6 ligands. 0.4 weeks Sketch examples of octahedral, tetrahedral, square planar and linear complexes. Know how some complexes can show (E–Z) or optical isomerism. Students draw and make models of complexes including ones with bidentate ligands and ones show cis-trans isomerism. Explain how optical isomers can form and draw examples. June 2011 Unit 5 Q6 January 2011 Unit 5 Q4c January 2004 Unit 5 Q10b Knockhardy powerpoint:
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