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CHE2060 2: Simple structures, functional groups

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Presentation on theme: "CHE2060 2: Simple structures, functional groups"— Presentation transcript:

1 CHE2060 2: Simple structures, functional groups
Topics Drawing molecular structures [Flipped] Arrow formalism & molecular framework Introduction to alkanes Isomers IUPAC naming of alkanes Alkyl halides & cycloalkanes Functional groups: where the action is Alkenes: hydrocarbons with > one double bond Alkynes: hydrocarbons with > one triple bond Alkene isomers: who’s across that double bond? Arenes Organohalogens Using molecular formulas Daley & Daley, Chapter 2 Organic Nomenclature & Functional Groups

2 Arrow formalism & molecular frameworks

3 Arrow formalism There are four types of arrows used in organic diagrams: Straight arrows: Resonance arrows: Curved arrows: Fishhook arrows Symbolizes chemical rxn; reactants become products Link equivalent resonance structures Shows movement of a pair of electrons in a structure of a chemical reaction \ C / \ C / + .. - O: O: Try this for acetate ions, CH3CO2-1 .. .. Shows movement of a single electron H H | | H - C • + • C - H H H | | H - C C - H heat

4 geraniol (oil of roses) bp 229-230°C
Classification by molecular framework 3 major classes of organic compounds: acyclic compounds - linear or branched carbocyclic compounds - rings consisting solely of carbon atoms heterocyclic compounds - rings of carbon & other heteroatoms OH geraniol (oil of roses) bp °C O OH testosterone mp 155°C N N CH3 nicotene bp 246°C

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