Lec-14-Chap-08-2P

Lec-14-Chap-08-2P - Lecture 14, Knowledge and Skills...

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1 Lecture 14 Covalent Bonding Multiple Covalent Bonds in Hydrocarbons 8.5 Bond Properties: Bond Length and Bond Energy 8.6 Bond Properties: Bond Polarity and Electronegativity 8.7 Lecture 14, Knowledge and Skills • Hydrocarbons and other molecules with multiple bonds • Isomerism (constitutional, geometric) Recognize molecules that can exist as geometric isomers • Some physical properties of isomers • Bond properties: bond length bond enthalpy bond polarity • Electronegativity of elements Multiple Covalent Bonds in Hydrocarbons Double Bonds: Alkenes ethene 1-propene Non-rotation around C = C nearly Alkenes: Butene 2-butene CC H H C C H H H H H H 1-butene HC H H C C H H C H H H C CH 3 H CH 3 cis -2-butene trans -2-butene H3C CH3 H H H 3C H H CH 3 constitutional isomers (different connectivity) geometric isomers H C C CH 3 CH 3 H Triple Bonds: Alkynes 2-butyne 1-butyne C C H H H H H H C C H H H H H H C H H C C H C H H H H H H H 3-hexyne no geometric isomers!
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2 Physical Consequences of Isomerism cis- and
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Lec-14-Chap-08-2P - Lecture 14, Knowledge and Skills...

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