The Effect on Composition of EtOH : H2O Solution on the Stability of Cobalt(II) Glycylglycinate Complexes

Autor:	K. A. Kipyatkov, Valentin A. Sharnin, V. A. Isaeva, A. S. Molchanov, M. V. Shishkin
Rok vydání:	2020
Předmět:	Glycylglycine Ligand Materials Science (miscellaneous) Inorganic chemistry Solvation chemistry.chemical_element Gibbs free energy Inorganic Chemistry Solvent Nickel chemistry.chemical_compound symbols.namesake chemistry Ionic strength symbols Physical and Theoretical Chemistry Cobalt
Zdroj:	Russian Journal of Inorganic Chemistry. 65:535-539
ISSN:	1531-8613 0036-0236
DOI:	10.1134/s0036023620040075
Popis:	The stability constants of cobalt(II) glycylglycinate complexes in water–ethanol solvent of variable composition are determined potentiometrically at 298 K and an ionic strength of the solutions (NaClO4) of 0.1. The stability of cobalt(II) complexes with glycylglycinate ion is found to increase with ethanol content in the solution. The resulting stability constants of cobalt(II) glycylglycinate are compared to the literature data on the stabilities of nickel(II) and copper(II) complexes with glycylglycine ion. The contributions of resolvation of the reagents to changes in the Gibbs free energy of cobalt(II) glycylglycinate formation in water–ethanol solvent are evaluated. The increase in stability of the complexes with glycylglycinate ion is mainly caused by weakening of ligand solvation as one proceeds from water to water–ethanol solvents.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::eabf43c943e8b5224974e3e22c4751ad https://doi.org/10.1134/s0036023620040075 Zobrazit plný text záznamu Full text from SpringerLink