## Abstract 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
Electrospray ionization mass spectrometric study of 1,3,4-thiadiazole–copper complexes: comparison with 1,3,4-oxadiazole derivatives
✍ Scribed by Rafał Frański
- Publisher
- John Wiley and Sons
- Year
- 2004
- Tongue
- English
- Weight
- 93 KB
- Volume
- 39
- Category
- Article
- ISSN
- 1076-5174
- DOI
- 10.1002/jms.636
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## Abstract The assignment of all ring carbons of 37 derivatives of 1,3,4‐oxa‐ or thiadiazoles and of seven isosydnones is described. In some cases, ^13^C‐labelled compounds were used. The analysis of substituent effects and the calculation of charge densities of some of the derivatives suggest tha
The isotherms of adsorption of CuX2 (X = Cl-, Br-, ClO-4) by silica gel chemically modified with 5-amino-1,3,4-thiadiazole-2-thiol were studied in acetone and ethanol solutions, at 25 degreesC. The following equilibria constants (in L mol-1) were determined: (a) CuCl2, 3.2 x 10(3) (ac), 2.5 x 10(3)
The fragmentation behaviour of ten 3,4-disubstituted 1,2,4-oxadiazole-5(4H)-thiones and seven 3,4-disubstituted 1,2,4-thiadiazole-5(4H)-ones studied here confirmed the earlier observations about the partial rearrangement of the former after ionization into the latter before further fragmentation. In