Study Edge UF – Spectra signals – Flashcards
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3200 - 3600 cm⁻¹
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Alcohol (IR spectra) Look for the big fatty!
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3100 - 3550 cm⁻¹
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Amine (IR spectra) Look at the shape to distinguish between 1˚ and 2˚
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2800 - 3200 cm⁻¹
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C-H bonds (IR spectra)
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1600 - 1680 cm⁻¹
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C=C (IR spectra)
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1630 - 1820 cm⁻¹
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C=O (IR spectra) Usually a very strong peak
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1000 - 1250 cm⁻¹
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C-O (IR spectra)
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0 - 2 ppm
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sp³ C-H
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2 - 3 ppm
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alpha hydrogens
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1.6 - 2.6 ppm
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allylic hydrogens
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2.0 - 3.0 ppm
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terminal hydrogen on an alkyne
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3 - 4.5 ppm
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electronegative atom - C - H
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4.5 - 4.7 ppm
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phenol
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4.5 - 6.0 ppm
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vinyl hydrogens
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6.5 - 8.5 ppm
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"benzene"
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9.5 - 10 ppm
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aldehyde
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10 - 13
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carboxylic acid
