IR Functional Groups - −1 are due to alkane CH stretches...

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Chapter 12—Infrared Spectroscopy Organic Chemistry 5 th Edition Paula Yurkanis Bruice
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Alcohol OH stretch Alkane CH stretch Section 12.11 OH 1-pentanol • OH stretch at 3400 cm −1 • CO stretch at 1066 cm −1 • Bands at 2969–2865 cm −1 are due to CH stretches CO stretch H
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Amine NH 2 Butylamine NH stretch NH bend 2 NH stretching bands at 3369 and 3293 cm −1 An NH bend at 1606 cm −1 Bands at 2960–2862 cm −1 are due to CH stretches Alkane CH stretch H
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Ketone C=O stretch Always a strong peak! O 3-pentanone C=O stretching band at 1720 cm −1 Bands at 2981–2883 cm −1 are due to alkane CH stretches Alkane CH stretch H
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Carboxylic acid OH O Butanoic acid C=O stretching band at 1712 cm −1 Broad band at approx. 3000 cm −1 due to the carboxylic acid OH stretch Peaks around 2971–2860 cm −1 are due to CH stretches C=O stretch OH stretch H Alkane CH stretch
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Aldehyde H O 3-methylbutanal C=O stretching band at 1728 cm −1 Band at 2822 and 2719 cm −1 are due to the aldehyde CH stretch Peaks around 2960–2875 cm
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Unformatted text preview: −1 are due to alkane CH stretches Aldehyde CH stretch C=O stretch H Alkane CH stretch Ester O O Methyl butanoate • C=O stretching band at 1742 cm −1 • The bands at 1198 and 1177 cm −1 are due to the C–O stretch • Peaks around 2967–2877 cm −1 are due to alkane CH stretches Alkane CH stretch C–O stretches H C=O stretch Amide N H O N-ethylpropanamide • C=O stretching band at 1648 cm −1 • NH bend at 1553 cm −1 • NH stretch at 3296 cm −1 • Peaks at 2976–2880 cm −1 are alkane CH stretches C=O stretch and NH bend NH stretch H Alkane CH stretch Nitrile • C≡N stretching band at 2232 cm −1 • Aromatic C–C stretching bands at 1601 and 1492 cm −1 (sometimes these can be weak) • Peaks at 3091–3031 cm −1 are aromatic CH stretches (weaker than alkene C–H stretch) C N benzonitrile C≡N stretch aromatic C–C stretch aromatic C–H stretch H...
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This note was uploaded on 05/31/2011 for the course CHEM 3341 taught by Professor Staff during the Spring '08 term at Georgia Southern University .

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IR Functional Groups - −1 are due to alkane CH stretches...

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