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• W1979617902 endingPage "274" @default.
• W1979617902 startingPage "261" @default.
• W1979617902 abstract "Abstract Potentiometric and spectroscopic methods were used to study complex formation in ternary Cu(II) systems with the ligands entn, Put, then, 2,3-tri, 3,3-tri, Spd, dapa and daba. Mixed complexes, Cu/diamine/triamine, formed in aqueous solution are characterized by 5N-type coordination, with four atoms coordinating equatorially and one at an axial position. An exception is the complex Cu(Put)(3,3-tri) in which 4N coordination was detected. A relatively low tendency to form mixed complexes was found for Cu/triamine/triamine systems, where formation of only the Cu (dien MSpd) compound was found. The complexing character of daba moiecules proves diversified and dependent on the type of the second ligand it forms the complex with. In Cu/daba/diamine compounds, coordination of the 3N10 type (with a 1N10 fragment from daba) was observed. In the Cu/daba/ triamine complexes one nitrogen atom of the diaminocarboxylate is involved in coordination at an equatorial position and the second at an axial position (5N coordination). A dapa ligand is not so diversified and its two amino groups coordinate equatorially (2N). yielding chromophore 4N in complexes with diamines (probably with weak interaction of an oxygeo atom) and 5N with tn amines. Spermidine also reveals different coordination properties, depending on the second ligand. in complexes with diamines, the interactions involve 3 nitrogen atoms from Spd but only two in complexes with triamines. Following the process of formation of mixed copper(II) complexes it w as found that with increasing pH, in the triamine/diamine and triamine/diaminocarboxylate systems, the anchoring ligand is the triamine, while in the diamine/diaminocarboxylate systems, dapa or daba are first to react and only then does the diamine do in the complex." @default.
• W1979617902 created "2016-06-24" @default.
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• W1979617902 date "1997-06-01" @default.
• W1979617902 modified "2023-09-27" @default.
• W1979617902 title "COMPLEX FORMATION IN COPPER(II) TERNARY SYSTEMS INVOLVING POLYAMINES AND DIAMINOCARBOXYLATES STUDIED BY POTENTIOMETRIC AND SPECTROSCOPIC TECHNIQUES" @default.
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• W1979617902 doi "https://doi.org/10.1080/00958979708045504" @default.
• W1979617902 hasPublicationYear "1997" @default.
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