Thermal studies on metal complexes of 5-nitroso-pyrimidine derivatives |
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| Authors: | M N Moreno-Carretero J M Salas-Peregrín A Mata-Arjona |
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| Institution: | (1) Department of Inorganic Chemistry, University College, Jaén, Spain;(2) Department of Inorganic Chemistry, Faculty of Sciences, University of Granada, Granada, Spain |
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| Abstract: | The following Zn(II) complexes of deprotonated 6-amino-5-nitrosouracil (AH), 6-amino-3-methyl-5-nitrosouracil (BH) and 6-amino-1-methyl-5-nitrosouracil (CH) have been prepared and their thermal behaviour studied by TG and DSC techniques: ZnA2(H2O)2, ZnB2 · 4 H2O, ZnC2 · 4 H2O and ZnC2(H2O)2 · H2O. The values of the dehydration enthalpy of the complexes are in the 31.3–76.5 kJ mol?1 H2O range and, except in the first complex, the dehydration processes take place in several steps. The pyrolysis of the complexes finishes between 540 and 725° C ZnO remaining as residue. |
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