Skip to main content

The Infrared Spectra of Acidic, Neutral, and Basic Aqueous Solutions of Glycine, N-Methylglycine, N,N-Dimethylglycine, and N,N,N-Trimethylglycine

Buy Article:

$29.00 plus tax (Refund Policy)


The infrared spectra of aqueous solutions of glycine, N-methylglycine (sarcosine), N,N-dimethylglycine, and N,N,N,-trimethylglycine (betaine) in different states of ionization are reported. The spectra of the dipolar forms of the first three compounds are shown to consist of bands represented in the spectra of both the positively and negatively charged forms, together with certain bands peculiar only to the dipolar form. In the spectrum of dipolar betaine, which exhibits no negatively charged structure, certain of the bands are also demonstrable in the spectrum of the positively charged form. Aqueous solutions of the hydrochlorides of the four compounds exhibit a strong band at 7.94 or at 8 00 microns, which disappears and is replaced by a band appearing at 7.5 to 7.6 microns when aqueous solutions of the sodium salts are examined. Methyl substitution on the nitrogen is revealed by a band between 67 and 68 microns, which is absent in the unsubstituted compound, glycine.

Document Type: Research Article


Affiliations: Department of Biochemistry, State University of New York, Downstate Medical Center, Brooklyn, New York

Publication date: November 1, 1963

More about this publication?

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more