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Electrospray ionization mass spectrometric study of 1,3,4‐oxadiazole–copper complexes
Author(s) -
Frański Rafał
Publication year - 2004
Publication title -
journal of mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 1076-5174
DOI - 10.1002/jms.576
Subject(s) - chemistry , oxadiazole , copper , electrospray ionization , electrospray , mass spectrometry , chelation , solvent , ionization , ion , polymer chemistry , medicinal chemistry , inorganic chemistry , organic chemistry , chromatography
The complexes of 2,5‐disubstituted‐1,3,4‐oxadiazoles, namely 2,5‐diphenyl‐1,3,4‐oxadiazole (1), 2,5‐bis(2‐pyridyl)‐1,3,4‐oxadiazole (2) and 2,5‐bis(4‐pyridyl)‐1,3,4‐oxadiazole (3), with copper cation were studied by electrospray ionization mass spectrometry (ESI‐MS). The ability of the compounds studied to form complexes with copper (under the ESI conditions) can be ordered as 2 > 1 > 3. The compounds studied tend to form both 1 : 1 and 2 : 1 chelate complexes with both copper(II) and copper(I). The complexes with copper(I) are formed in the ESI process. The influence of solvent polarity, solution flow‐rate, counter ions (Cl − , NO 3 − , CH 3 COO − , SO 4 2− , acetylacetonates) on the type of the ions observed was studied. Copyright © 2004 John Wiley & Sons, Ltd.