Chapter 20 October 24 -...

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1 Common IR Carbonyl Absorption Values for Aldehydes and Ketones: Proton NMR Spectroscopy of Aldehydes and Ketones: Aldehyde protons give distinct absorptions near 10 δ Aldehyde protons undergo spin/spin splitting with neighboring hydrogens Ketones/aldehydes: protons on carbons directly adjacent to carbonyl groups are deshielded and shifted downfield
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2 Acetaldehyde:
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3 Chapter 20: Carboxylic Acids and Nitriles Carboxlyic Acids: Nomenclature 1. 2. Examples: Examples: There are two ways to name carboxylic acids. The system used depends on the complexity of the compound Replace the "­e" of the alkane name with "­oic acid" The carbonyl carbon is carbon 1 for the parent chain Structures that have a ­CO 2 H group bonded to a ring are named by adding the suffix carboxylic acid to the end of the cycloalkane name
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4 Carboxylic Acid Common Names:
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5 Nitriles: Nomenclature 1. Examples: 2. Examples: Open chain nitriles are named by adding the suffix "­nitrile" to the alkane name.
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Chapter 20 October 24 -...

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