Spectroscopy

Introduction To UV-Vis Spectroscopy

September 16, 2016

In today’s post we’ll discuss why most molecules are colourless, introduce the useful technique of UV-visible spectroscopy, and finally explain why molecules like chlorophyll and β-carotene are coloured.…

How Bleach Works: Understanding Colors From Nature

September 8, 2016

Why are tomatoes red? Why are carrots orange? Why are egg yolks yellow?   And… why is Vulcan blood green? OK, I’m not going to touch that last one, but as for the first three: great question. There are…

Degrees of Unsaturation (Index of Hydrogen Deficiency)

August 26, 2016

The molecular formula of a compound can give helpful hints about its structure. Today we’ll talk about a quick and useful calculation we can perform to obtain the number of [multiple bonds + rings] in an un…

Pictorial Guide to Infrared Spectra

Pictorial Guide to Infrared SpectraAugust 3, 2011

From the “I wish I made this” department…. Pictorial Guide to Infrared Spectra (Jon Chui, U. of Victoria, Canada) Apparently Jon has been thinking about putting together a similar graphic for NMR, b…