The Infrared Spectra of Acidic, Neutral, and Basic Aqueous Solutions of Glycine, N-Methylglycine, N,N-Dimethylglycine, and N,N,N-Trimethylglycine
Abstract: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?
- The Society publishes the internationally recognized, peer reviewed journal, Applied Spectroscopy, which is available both in print and online. Subscriptions are included with membership or can be purchased by institutional or corporate organizations. Abstracts may be viewed free of charge. Previously published as Bulletin (Society for Applied Spectroscopy)
- Editorial Board
- Information for Authors
- Submit a Paper
- Subscribe to this Title
- Membership Information
- Request copyrighted SAS materials
- Spectroscopic Nomenclature
- Focal Point (Open Access)
- ingentaconnect is not responsible for the content or availability of external websites