Synthesis, characterization, and thermodynamics of tertiary phosphine cobalt(III) Schiff-base complexes

Citation
M. Asadi et Ah. Sarvestani, Synthesis, characterization, and thermodynamics of tertiary phosphine cobalt(III) Schiff-base complexes, CAN J CHEM, 79(9), 2001, pp. 1360-1365
Citations number
20
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Chemistry
Journal title
CANADIAN JOURNAL OF CHEMISTRY-REVUE CANADIENNE DE CHIMIE
ISSN journal
0008-4042 → ACNP
Volume
79
Issue
9
Year of publication
2001
Pages
1360 - 1365
Database
ISI
SICI code
0008-4042(200109)79:9<1360:SCATOT>2.0.ZU;2-1
Abstract
[Co(5-nitroSalen)(PBu3)]ClO4.H2O and [Co(Salpd)(PBu3)]ClO4.H2O were synthes ized and characterized. The stability constants and the thermodynamic param eters were measured spectrophotometrically for 1:1 adduct formation of [CoL (PBu3)]ClO4.H2O, (L = Salen, 5-nitroSalen, Salpd), and [Co(Salen)(PMe2Ph)]C lO4.H2O as acceptors with P(OR)(3,) (R = Me, Et, i-Pr) as donors, in aceton itrile solvent and in constant ionic strength (I = 0.01 M) and at various t emperatures. The trend of the reactivity of cobalt(III) Schiff-base complex es with PBu3 axial ligand toward a given donor is as follows: 5-nitroSalen > Salen > Salpd. Also, the following reactivity trend of the donors toward a given cobalt(II I) Schiff-base complex is in the operation: P(O-i-Pr)(3) > P(OEt)(3) > P(OM e)(3).