Please use this identifier to cite or link to this item: https://hdl.handle.net/2440/47039
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Type: Journal article
Title: Synthesis purification and structural characterization of the dimethyldiselenoarsinate anion
Author: Gailer, J.
George, G.
Harris, H.
Pickering, I.
Prince, R.
Somogyi, A.
Buttigieg, G.
Glass, R.
Denton, M.
Citation: Inorganic Chemistry: including bioinorganic chemistry, 2002; 41(21):5426-5432
Publisher: Amer Chemical Soc
Issue Date: 2002
ISSN: 0020-1669
1520-510X
Statement of
Responsibility: 
Jürgen Gailer, Graham N. George, Hugh H. Harris, Ingrid J. Pickering, Roger C. Prince, Arpad Somogyi, Gavin A. Buttigieg, Richard S. Glass, and M. Bonner Denton
Abstract: A novel arsenic-selenium solution species was synthesized by reacting equimolar sodium selenite and sodium dimethylarsinate with 10 mol equiv of glutathione (pH 7.5) in aqueous solution. The solution species showed a single (77)Se NMR resonance at 112.8 ppm. Size-exclusion chromatography (SEC) using an inductively coupled plasma atomic emission spectrometer (ICP-AES) as the simultaneous arsenic-, selenium-, sulfur-, and carbon-specific detector revealed an arsenic-selenium moiety with an As:Se molar ratio of 1:2. Electrospray ionization mass spectrometry (ESI-MS) of the chromatographically purified compound showed a molecular mass peak at m/z 263 in the negative ion mode. Fragmentation of the parent ion (ESI-MS-MS) produced (CH(3))(2)As(-) and Se(2)(-) fragments. Arsenic and selenium extended X-ray absorption fine structure spectroscopy (EXAFS) of the purified species revealed two As-C interactions at 1.943 A and two As-Se interactions at 2.279 A. On the basis of these results this novel solution species is identified as the dimethyldiselenoarsinate anion.
Keywords: Selenium Radioisotopes
Solutions
Indicators and Reagents
Environmental Pollutants
Chromatography, Gel
Magnetic Resonance Spectroscopy
Hydrogen-Ion Concentration
Mass Spectrometry
Description: Copyright © 2002 American Chemical Society
DOI: 10.1021/ic0113146
Published version: http://pubs.acs.org/cgi-bin/abstract.cgi/inocaj/2002/41/i21/abs/ic0113146.html
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