Co(II) and Ni(II) coordination compounds with bis(1-methylimidazol-2-yl) ketone (BIK) of general formula M(BIK) 2X 2 (M = Co or Ni; X = Cl or NO 3) were synthesized and characterized by elemental analysis, by UV-vis and FTIR spectroscopies. Following our previous thermoanalytical studies on imidazole-substituted coordination compounds, the thermal behavior of the synthesized complexes was investigated by TG and DTG techniques: the thermal profile is always characterized by three substantial consecutive releasing steps for all the three complexes and the releasing supposed behavior is confirmed by EGA analysis (TG-MS and TG-FTIR). In particular, the first step is ascribed to the release of the two anions, followed by the loss of four methyl groups (side chains of the ligand) and two bridge-carbonyl groups. The residual Cobalt or Nickel tetra-imidazole complex decomposes in a final step to give the metal oxide as the final residue. © 2012 Elsevier B.V.
TG-MS and TG-FTIR studies of imidazole-substituted coordination compounds: Co(II) and Ni(II)-complexes of bis(1-methylimidazol-2-yl)ketone / Materazzi, Stefano; VECCHIO CIPRIOTI, Stefano; L. W., Wo; Simonetta De Angelis, Curtis. - In: THERMOCHIMICA ACTA. - ISSN 0040-6031. - 543:(2012), pp. 183-187. [10.1016/j.tca.2012.05.013]
TG-MS and TG-FTIR studies of imidazole-substituted coordination compounds: Co(II) and Ni(II)-complexes of bis(1-methylimidazol-2-yl)ketone
MATERAZZI, Stefano;VECCHIO CIPRIOTI, Stefano;
2012
Abstract
Co(II) and Ni(II) coordination compounds with bis(1-methylimidazol-2-yl) ketone (BIK) of general formula M(BIK) 2X 2 (M = Co or Ni; X = Cl or NO 3) were synthesized and characterized by elemental analysis, by UV-vis and FTIR spectroscopies. Following our previous thermoanalytical studies on imidazole-substituted coordination compounds, the thermal behavior of the synthesized complexes was investigated by TG and DTG techniques: the thermal profile is always characterized by three substantial consecutive releasing steps for all the three complexes and the releasing supposed behavior is confirmed by EGA analysis (TG-MS and TG-FTIR). In particular, the first step is ascribed to the release of the two anions, followed by the loss of four methyl groups (side chains of the ligand) and two bridge-carbonyl groups. The residual Cobalt or Nickel tetra-imidazole complex decomposes in a final step to give the metal oxide as the final residue. © 2012 Elsevier B.V.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
