Chapter 4 Notes

Chapter 4 Notes - Chapter 4 Notes Alkenes: Structure,...

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Chapter 4 Notes – Alkenes: Structure, Nomenclature, and Stability 4.1 – Molecular Formulas - Alkenes: hydrocarbons that contain a carbon—carbon double bond - Molecular formula: C n H 2n - The general molecular formula for a hydrocarbon is C n H 2n+2 , minus two hydrogens for every π bond or ring present in the molecule - Unsaturated hydrocarbons: fewer than the maximum number of hydrogens (alkenes) - Saturated hydrocarbons: contain the maximum number of C—H bonds possible and are saturated with hydrogens (alkanes) 4.2 – Nomenclature of Alkenes - The double bond is the functional group in an alkene - The systematic name is obtained by replacing the ane at the end of the parent hydrocarbon’s name with the suffix ene - Number the longest continuous chain containing the functional group in the direction that gives the functional group suffix the lowest possible number - When there is only a substituent the substituent gets the lowest possible number - When there is only a functional group suffix, the functional group suffix gets the lowest possible number - When there is both a functional group suffix and a substituent, the functional group suffix gets the lowest possible number - If a chain has more than one double bond, we first identify the chain that contains
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Chapter 4 Notes - Chapter 4 Notes Alkenes: Structure,...

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