Author | Brian C. Smith

Articles

Organic Nitrogen Compounds IX: Urethanes and Diisocyanates

May 21, 2020

Spectroscopy

Article

Here we delve into the interpretation of another organic nitrogen compound, known as polyurethane, a ubiquitous polymer used for wood finishes and foam rubber.

Organic Nitrogen Compounds VIII: Imides

March 01, 2020

Spectroscopy

Article

Here, we continue our examination of the infrared (IR) spectra of organic nitrogen compounds with imides, which are a common chemical intermediate. IR can be used not only to identify imides, but also to distinguish between straight chain and cyclic imides. We explain how.

Organic Nitrogen Compounds, VII: Amides—The Rest of the Story

January 01, 2020

Spectroscopy

Article

The N-H stretching and bending peaks can be used to distinguish primary, secondary, and tertiary amides and to ascertain protein structure. Here’s how.

Organic Nitrogen Compounds VI: Introduction to Amides

November 01, 2019

Spectroscopy

Article

Amides are an important functional group found extensively in polymers and proteins. There are three different families of amides. Here, is explained how to distinguish them using infrared spectroscopy.