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Uni -structural

This guide explores key features of alkenes, focusing on molecular shape, bond angles, and the nature of double bonds, including sigma and pi bonds. Using provided resources, you'll learn about alkene reactions, including bond enthalpies and the differences in strength between sigma and pi bonds. Additionally, the document delves into reactions involving halogens and hydrogen with alkenes, predicting mechanisms like the reaction of HBr with ethene. Enhance your understanding by reviewing relevant textbook pages and examining the implications of electronegativity and bond fission types.

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Uni -structural

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  1. Uni-structural Use the link to help you identify common features of alkenes Also use page 126 in your text book

  2. Multistructural Use the link to help you work out the shape of alkene molecules Write your response down in terms of bond angles and the reasons for the bond angles

  3. Multistructural Describe the nature of the double bond. You must mention sigma and pi bonds, what they are and how they are formed

  4. Relational Same video as before, in addition use page 128 of your text book to support. Describe and explain what happens when an alkene reacts, what the bond enthalpies show, the differences inb strength between a sigma and a pi bond

  5. Relational Find out what type of reaction causes halogens and hydrogen to react with alkenes. Explain why these reactions happen. Also use page 128 and 129 to add examples to your response.

  6. Extended abstract Try and predict the reaction mechanism that occurs when HBr and ethene react. Things to think about; What is the product? What are the characteristics of a double bond? Does hydrogen bromide have a ‘perfect’ covalent bond (think electronegativites) Heterolytic or homolytic fission? Find out what curly arrows mean! Please do not worry if you don’t complete this activity, we will be covering it in more detail next lesson.

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