ISSN print edition: 0366-6352
ISSN electronic edition: 1336-9075
Registr. No.: MK SR 9/7

Published monthly
 

Copper complexes with organic ligands. I. Chemistry of salicylatocopper(II) complexes

J. Krätsmár-Šmogrovič and V. Jokl

Komenský University, Bratislava

 

Abstract: The interaction of Cu2+ and C6H4(OH)CO2- in aq. solns. to form ([Cu(Sal)2(H2O)2].2H2O) (I) (HSal is salicylic acid) was described. At pH 4.0 in the system Cu2+ - Sal- - H2O, I is crystd., if Cu2+:Sal- is in the equiv. 1:2 or equimolar 1:1 ratio. The molar concns. of satd. aq. solns. of I are 2.46 × 10-2 at 20°, 3.33 × 10-2 at 30°, 4.69 × 10-2 at 40°, and 6.82 × 10-2 at 50°. I loses the bound H2O at room temp., if the H2O vapor pressure over the crystals is ≤1.3 mm. Complete dehydration is at 85-90° and is reversible. By spectrophotometric and paper-electrophoretic methods, it was detd. that at pH 2-6 and a component ratio of 1:1, this Cu(II) complex is formed in 2 steps: Cu2+ + Sal- ↹ [Cu(Sal)]+; [Cu(Sal)]+ + Sal- ↹ [Cu(Sal)2]. At pH 6-7, a chelate is formed: [Cu(Sal)]+ + H2O ↹ [Cu(C6H4OCO2)] + H3O+.

Full paper in Portable Document Format: 1912a881.pdf (in Slovak)

 

Chemical Papers 19 (12) 881–891 (1965)

Thursday, March 28, 2024

IMPACT FACTOR 2021
2.146
SCImago Journal Rank 2021
0.365
SEARCH
Advanced
VOLUMES
European Symposium on Analytical Spectrometry ESAS 2022
© 2024 Chemical Papers