Branched Alkanes Structural Formulas Structural Isomers 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/ Organic Chem–Alkenes&Alkynes11/05/ Org Chem-Branched Alkanes11/08/10 81 Objective: The student will record lecture notes on Hydrocarbons and document how to use the IUPAC nomenclature rules to name Alkanes Agenda: Organic Chemistry– Lecture

Branches on carbon chains H H C CH3 methyl H H C C CH3CH2 ethyl H

CH3 CH3CH CH3 methyl groups CH3 CH3 CH3CH CH2CHCH3

CH3 methyl branch CH3CH2CH2CHCH2CH Count 3-Methylhexane on third C CH3 six carbon chain group

1. Count the C’s in the longest chain 2. Name each attached group 3. Count the longest carbon chain to give the first attached group the smallest number 4. Name and locate each group

CH3 CH3 CH3CHCH2CHCH3 CH3 CH3 CH3CH2CHCH2CHCH2CH3 CH3 2,4-dimethylpentane 3,3,5-trimethylheptane

Write a condensed structure for 3,4-dimethylheptane CH3 CH3CH2CHCHCH2CH2CH3 CH3

Same molecular formula Same number and types of atoms Different arrangement of atoms

Write 3 isomers of C5H12 and name each. CH3CH2CH2CH2CH3 pentane CH3CHCH2CH3 2-methylbutane CH3 CH3 CH3CCH3 2,2-dimethylpropane CH3