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Complex Formation of Bis(salicylidene)ethylenediamine (Salen type ligand) with Cupper(II) Ions in Different Solvents: Spectrophotometric and Conductometric Study.
- Source :
- International Journal of New Chemistry; Winter2020, Vol. 7 Issue 1, p1-13, 13p
- Publication Year :
- 2020
-
Abstract
- The complexation reaction between salen (Bis(salicylidene)ethylenediamine) and Cu(II) cations in methanol (MeOH), 2-propanol (2-PrOH), acetonitrile (AN), tetrahydrofuran (THF), and chloroform (CHCl<subscript>3</subscript>) as nonaqueous solvents at 25º C has been investigated. The stoichiometry and formation constants of complexes have been determined spectrophotometrically and conductometrically by method of continuous variations and mole ration method. The stoichiometry of Cu(II)-salen complexes in all solvents were 1:1 (ML) type using the two methods. By method of continuous variation, chloroform > 2-propanol > methanol ~ acetonitrile ~ tetrahydrofuran. However, by mole ratio method, the order of stability was as follows: chloroform ~ tetrahydrofuran > 2-propanol > methanol ~ acetonitrile. The resulting average of pKf values in each solvent using the two spectrophotometric methods was as follows: 7.40, 6.89, 6.8, 6.22, and 6.18 for chloroform, 2-propanol, tetrahydrofuran, acetonitrile, and methanol, respectively. The Cu(II) cation formed a more stable complex with salen in chloroform. However, the less stable complex was in methanol. [ABSTRACT FROM AUTHOR]
- Subjects :
- ETHYLENEDIAMINE
COPPER ions
SPECTROPHOTOMETRY
CONDUCTOMETRIC analysis
CHLOROFORM
Subjects
Details
- Language :
- English
- ISSN :
- 26457237
- Volume :
- 7
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- International Journal of New Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 141188272
- Full Text :
- https://doi.org/10.22034/IJNC.2020.116394.1062