Artículos de revistas
Synthesis, characterization and TG-DSC study of cadmium halides adducts with caffeine
Registro en:
Thermochimica Acta. Elsevier Science Bv, v. 406, n. 41671, n. 245, n. 248, 2003.
0040-6031
WOS:000186374000026
10.1016/S0040-6031(03)00229-6
Autor
de Farias, RF
da Silva, AO
da Silva, UG
Institución
Resumen
The synthesis, characterization and TG-DSC study of the compounds CdX(2)(.)ncaff, for which X: Cl, Br and 1; n = I and 2 and caff: caffeine is reported. It is verified that caffeine is coordinated through more than one coordination site, despite the fact that the nitrogen of the imidazole ring is the main coordination site. The following thermal stability trend is observed: Cl > Br > I and monoadducts are more stable than bisadducts. The thermal degradation (td) enthalpies have the values (kJ mol(-1)): 58.2 and 71.5; 74.9 and 91.4; 31.1 and 47.5 for Cl, Br and I mono and bisadducts, respectively. (C) 2003 Elsevier Science B.V. All rights reserved. 406 41671 245 248