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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
PH-metric and spectroscopic properties of new 4-hydroxysalicylidene-2- aminopyrimidine Schiff-base transition metal complexes
Journal of Molecular Structure, Volume 973, No. 1-3, Year 2010
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Description
The new complexes, cis-[WO2(Hsap)2], [Ru(PPh 3)2(Hsap)2], [Pd(Hsap)Cl(H2O)], [Pd(PPh3)2(Hsap)]Cl, [Ag(Hsap)(H2O) 2], [Ni(Hsap)(AcO)(H2O)2], [Ni(Hsap) 2] and [Cu(Hsap)Cl(H2O)] are reported, where H 2sap is 4-hydroxysalicylidene-2-amino pyrimidine Schiff-base. The complexes were characterized by elemental analyses, spectroscopic (IR, NMR, UV-vis, ESR and mass) and physical techniques (conductivity, magnetic and thermal measurements). The Schiff-base H2sap behaves as a bidentate chelate with the deprotonated 2-hydroxy and azomethine nitrogen centers with the pendant pyrimidine cyclic nitrogen functionality playing no role in coordination. The dissociation constants of H2sap and the stability constants of the metal complexes have been determined pH-metrically at various temperatures, and the thermodynamic activation parameters (ΔS, ΔG, ΔH) calculated. © 2010 Elsevier B.V. All rights reserved.
Authors & Co-Authors
Ouf, Abd El Fatah M.
Egypt, Mansoura
Faculty of Science
Ali, Mayada S.
Egypt, Mansoura
Faculty of Science
Saad, Eman M.
Egypt, Ismailia
Faculty of Science
Mostafa, Sahar I.
Egypt, Mansoura
Faculty of Science
Statistics
Citations: 45
Authors: 4
Affiliations: 2
Identifiers
Doi:
10.1016/j.molstruc.2010.03.037