Spectrophotometric study of the complexation reactions between alkaline earth cations and murexide in some non-aqueous solutions |
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| Affiliation: | 1. UOC Medicina Interna, Foundation IRCCS “Ca'' Granda” Ospedale Maggiore Policlinico, Milan, Italy;2. Hematology and Bone Marrow Transplantation Unit, Vita-Salute San Raffaele University, Milan, Italy;3. Bone Metabolic Unit, Department of Nuclear Medicine, Foundation IRCCS “Ca'' Granda” Ospedale Maggiore Policlinico, Milan, Italy;4. Scuola di Specializzazione in Radiodiagnostica, University of Milan, Milan, Italy;5. Department of Hematology, Ospedale San Gerardo, Monza, Italy;6. Radiology Unit, Foundation IRCCS “Ca'' Granda” Ospedale Maggiore Policlinico, Milan, Italy;7. University of Brescia, Viale Europa 11, 25123 Brescia, Italy;8. Department of Clinical Science and Community Health, University of Milan, Milan, Italy |
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| Abstract: | The complexation reactions between alkaline earth cations and murexide in methanol, dimethylformamide and dimethylsulphoxide solutions have been studied spectrophotometrically at 25°C. The formation constants of the resulting 1 : 1 complexes were determined. In all solvents used, the stabilities of the murexide complexes vary in the order Ca2+ > Sr2+ > Ba2+ > Mg2+. There is an inverse relationship between the stabilities of the complexes and the Gutmann donicity of the solvents. |
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