Alkenes and Alkynes Geometric Isomers of Alkenes Addition Reactions Table of Contents Lecture/Lab/Activity Date Pg# 22. The Periodic Table9/24/10 47 23.

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Alkenes and Alkynes Geometric Isomers of Alkenes Addition Reactions Table of Contents Lecture/Lab/Activity Date Pg# 22. The Periodic Table9/24/ Periodic Def & Trends9/27/ Electron config practice10/4/ Ions and Oxidation Numbers10/5/ Lewis Dot Diagram10/6/ Intro to Chemical Bonding10/7/ Covalent Bonding10/12/ Ionic Bonding 10/14/ Ionic vs. Covalent Lab10/18/ Metallic Bonding10/19/ Molecular Geometry10/21/ Writing Chemical Formulas10/25/ Naming Ionic Compounds10/26/ Ionic Compounds Puzzle10/27/ Naming Molecular Compounds10/29/ Acid Nomenclature11/03/ Organic Chemistry – Alkanes11/04/ Ionic & Covalent Review11/08/ Organic Chem–Alkenes&Alkynes11/09/10 81 Objective: The student will use IUPAC nomenclature rules to name Alkenes & Alkynes after completing the weekly quiz Agenda: Organic Chemistry– Lecture

Saturated compounds (alkanes) maximum number of hydrogen atoms attached to each carbon atom Unsaturated compounds fewer hydrogen atoms attached to the carbon chain than alkanes Unsaturated compounds contain double or triple bonds

Carbon-carbon double bonds Names end in -ene H2C=CH2 ethene (ethylene) H2C=CH-CH3 propene (propylene) cyclohexene

Carbon-carbon triple bonds Names end in -yne HC CH ethyne(acetylene) HC C-CH3 propyne

When the carbon chain has 4 or more C atoms, number the chain to give the lowest number to the double or triple bond CH2=CHCH2CH3 1-butene CH3CH=CHCH3 2-butene CH3CH CHCH3 2-butyne

Write the IUPAC name for each of the following unsaturated compounds: CH3CH2C CCH3 CH3 CH3C=CHCH3 2-pentyne 2-methyl-2-butene 3-methylcyclopentene

Double bond is fixed Cis/trans Isomers are possible

Adds a hydrogen atom to each carbon atom of a double bond H H Ni H H H–C=C–H + H2  H–C–C–H H H ethene ethane

Adding H2 to vegetable oils produces compounds with higher melting points Margarines Soft margarines Shortenings (solid)