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Mass Spectroscopy & Infrared Spectroscopy

Mass Spectroscopy & Infrared Spectroscopy. Kate O’Brien. Propanal. =aldehyde. Mr:58. Peak at 1700, suggesting a C=O bond. Peaks at 2800-3100 suggest C-H bond. M+ Fragment at m/z=58 The Mr of Propanal is also 58. Fragment at 29 m/z shows CH3CH2+. Fragment at 57 suggests CH3CH2CO+.

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Mass Spectroscopy & Infrared Spectroscopy

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  1. Mass Spectroscopy&Infrared Spectroscopy Kate O’Brien

  2. Propanal =aldehyde Mr:58 Peak at 1700, suggesting a C=O bond Peaks at 2800-3100 suggest C-H bond M+ Fragment at m/z=58 The Mr of Propanal is also 58 Fragment at 29 m/z shows CH3CH2+ Fragment at 57 suggests CH3CH2CO+

  3. Propanoic acid =Carboxylic acid Mr:74 Peak at 1300 shows C-O bond Peak at 1700 shows a C=O bond Peak 2500-3300 suggests a O-H bond M+ Fragment of m/z=74 The Mr of Propanoic acid is also 74 Fragment at 57 suggests CH3CH2CO+ Fragment at 29 m/z shows CH3CH2+ Fragment at 45 shows COOH+

  4. Propanone =Ketone Mr:58 Peak at 1700 shows a C=O bond M+ Fragment at m/z=58 The Mr of Propanone is also 58 Fragment at m/z=43 shows CH3CO+ Fragment at m/z= 15 shows CH3+

  5. Propan-1-ol =Alcohol Mr:61 Peak from 2800-3000 shows a C-H bond Peak at 1000 shows C-O bond Peak at 3100-3500 shows O-H bond Fragment at 29 shows CH3CH2+ Fragment at m/z= 15 shows CH3+ Fragment at m/z=31 shows C2OH+ M+ Fragment at m/z=61 The Mr of Propan-1-ol is also 61

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