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Unformatted text preview: 1 Chapter 4: Carbon and the Molecular Diversity of Life Important Point: Carbon Chemistry But only Hydrocarbon Derivatives are Abundant in Life Hydrocarbons are Simpler Isomers are compounds that share molecular formulas but differ in some way in terms of their structure CarbonValence = 4 Representational Models Rotation Around Single Bonds Free rotation 2 Hydrocarbons & Isomers Linear Alkanes: Branching Creates Structural Isomers: Structural Isomers = Same Formula, Different Structure Methyl Propane = Isobutane Double Bonds & Rings No rotation No rotation No rotation These are all planar molecules Implicitly Depicting Carbons Carbons shown as corners Double bonds Note are different formulas on either side of dots Double Bonds Note that these all the above have different molecular formulas They are not isomeric! Geometric Isomers A A B B A B B A Geometric isomers vary about double bonds No rotation about double bonds Geometric Isomers A A B B A B B A Geometric Isomers have same structure but different Geometry!...
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- Spring '08