Mar 01, 2018
Spectroscopy
Acid anhydrides are unique in that they have two carbonyl groups in them. The intensity and position of their IR peaks can be used to determine which of the four types of anhydride exist in a sample.
Jan 01, 2018
Spectroscopy
How to spot carboxylic acids in your IR spectra
Nov 01, 2017
Spectroscopy
Aldehydes feature a unique “lone hydrogen” atom, giving rise to unique C-H stretching and bending peaks, making them easy to spot. In this installment, a new feature is also presented, “IR Spectral Interpretation Review,” where key concepts from past columns are presented for those new to the column and for readers who need a refresher.
Sep 01, 2017
Spectroscopy
An introduction to the IR spectroscopy of the carbonyl group, exploring why the peak is intense and showing how to apply that knowledge to the analysis of the spectra of ketones
Jul 01, 2017
Spectroscopy
Two unrelated discussions are presented: carbohydrates and alkynes.
May 01, 2017
Spectroscopy
We will discuss three different types of ether, which are characterized by the type of carbons attached to the central oxygen.
Apr 01, 2017
Spectroscopy
Our survey of the spectroscopy of the C–O bond continues. Here, we complete our discussion of alcohols and discuss how to distinguish pure alcohols, alcohol–water mixtures, and pure water from each other.
Jan 01, 2017
Spectroscopy
The number and position of C-O stretches will help us identify functional groups such as alcohols and ethers, and will help us distinguish between members of the same molecular class.
Nov 01, 2016
Spectroscopy
How can we distinguish the six different types of carbon–carbon double bonds, or alkenes, from each other?
Sep 01, 2016
Spectroscopy
The benzene fingers are a series of overtone and combination bands that can be used to distinguish substituted benzene rings when other methods do not work.
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