IR Spectroscopy - 1.5 Hour Video (Patreon)

This organic chemistry video tutorial provides a review of IR Infrared Spectroscopy and how you can use it to distinguish one molecule from another according to their functional groups.  This video contains plenty of lecture notes as well as a few multiple choice practice problems that will help you for your next organic chemistry test or exam.

Here is a list of topics covered in this video:

1.  Introduction to IR Spectroscopy

2.  Absorption of IR energy - Molecular Vibrations - Stretching, Compression, & Bending

3.  Concept of Transmittance and Absorbance

4.  Relationship Between Wavelength, Wavenumber cm^-1, Frequency, and Energy

5.  Signal Characteristics Shape: Broad vs Sharp

6.  Signal Intensity: Weak, Medium, or Strong

7.  The effect of hydrogen bonding and bond polarity on signal shape and intensity

8.  Diagnostic / Functional Group Region vs Fingerprint Region

9.  The Relationship Between The Mass of the Atom and The Wavenumber

10.  Relationship Between Bond Strength and Wavenumber

11.  The Effect of Conjugation on IR Frequency Absorption

12.  IR Spectrum For Alkanes, Alkenes, & Alkynes

13.  IR Spectrum of an Internal Alkyne vs a Terminal Alkyne

14.  IR Active vs IR Inactive Compounds - Symmetrical & Assymetrical Bonds

15.  Electric Field, Force, & Dipole Moments - IR Bond Stretch vs Compression

16.  IR Spectrum of a Carboxylic Acid vs an Alcohol - OH Stretch

17.  IR Spectrum of Aldehydes & Ketones: C=O Carbonyl Stretch @ 1700 cm^-1

18.  IR Graph of Esters and Ethers:  C-O Stretch @ 1000 to 1300.  Sp2 vs Sp3 Hybridized Carbon 

19.  IR Graph of Primary and Secondary Amines:  Single vs Double Peak at 3300 & 3400 cm^-1

Symmetric and Assymetric Stretching of NH2 Hydrogen Atoms.

20.  IR Spectrum of Amides & Nitriles 

21.  Carbonyl C=O Stretch - Resonance Electron Donating Groups vs Inductive Electron Withdrawing Groups

22.  IR Spectrum of Aromatic Benzene Ring Derivatives C=C & =CH Stretch