Characteristic Absorptions of C — N Bonds

The infrared spectra for three compounds are provided. Each compound has one or more of the following functional groups conjugated ketone, ester, amide, nitrile, and alkyne. Determine the functional group(s) in each compound. 

It may seem there are too many numbers to memorize in infrared spectroscopy. There are hundreds of characteristic absorptions for different kinds of compounds, and a detailed reference table of characteristic frequencies is given in Appendix 2. Please glance at Appendix 2, and note that Appendix 2A is organized visually, while Appendix 2B is organized by functional groups. For everyday use, we can get by with only a few stretching 

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The Infrared Region 515 12-4 Molecular Vibrations 516 12-5 IR-Active and IR-lnactive Vibrations 518 12-6 Measurement of the IR Spectrum 519 12-7 Infrared Spectroscopy of Hydrocarbons 522 12-8 Characteristic Absorptions of Alcohols and Amines 527 12-9 Characteristic Absorptions of Carbonyl Compounds 528 12-10 Characteristic Absorptions of C—N Bonds 533 12-11 Simplified Summary of IR Stretching Frequencies 535 12-12 Reading and Interpreting IR Spectra (Solved Problems) 537 12-13 Introduction to Mass Spectrometry 541 12-14 Determination of the Molecular Formula by Mass Spectrometry 545... 

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