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Spectroscopy of Aldehydes and Ketones

Spectroscopy of Aldehydes and Ketones. IR Spectrum of Acetone. C=O. IR Spectrum of Acetophenone. C=O. IR Spectrum of Acetaldehyde. Ald. C-H. C=O. IR Spectrum of p-Tolualdehyde. Ald. C-H. Ald. C-H. C=O. C=O. Summary of Spectral Features.

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Spectroscopy of Aldehydes and Ketones

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  1. Spectroscopy of Aldehydes and Ketones

  2. IR Spectrum of Acetone C=O

  3. IR Spectrum of Acetophenone C=O

  4. IR Spectrum of Acetaldehyde Ald. C-H C=O

  5. IR Spectrum of p-Tolualdehyde Ald. C-H Ald. C-H C=O C=O

  6. Summary of Spectral Features IR: 1710-1730 cm-1 (C=O stretching frequency) (lower by ~ 20 to 30 cm-1 if C=O is conjugated) aldehydes only: C-H stretch: 2820 & 2720 cm-1 13C-NMR: both aldehydes and ketones have a characteristic C=O peak at 190-215 d. 1H-NMR: aldehydes only: ald. C-H absorbs at 10 d. both aldehydes and ketones have Hs a to C=O at 2.2-2.5 d.

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