2007
DOI: 10.1007/s10973-006-7794-9
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Thermal behaviour of Co(II), Ni(II), Cu(II), Zn(II), Hg(II) and Pd(II) complexes with isatin-β-thiosemicarbazone

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Cited by 43 publications
(22 citation statements)
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“…The electronic spectra of isatin-b-thiosemicarbazone show reference absorption bands of the aromatic ring (k 1 = 251 nm and k 2 = 281 nm) and the indole moiety due to transitions of the p-p* type and an absorption band at k 3 = 355 nm. In the case of the thiosemicarbazone part of the molecule, no transitions which could be assigned to an n-p* type were observed in the spectra, since they are covered with the more intensive p-p* type [21,22]. The electronic spectra of H 2 MICT ligand show primer absorption band at 372 nm due to a transition of the thiosemicarbazone part of the molecule pp* type, 292 nm, and 244 nm due to the aromatic ring and the indole moiety.…”
Section: Uv Spectramentioning
confidence: 96%
“…The electronic spectra of isatin-b-thiosemicarbazone show reference absorption bands of the aromatic ring (k 1 = 251 nm and k 2 = 281 nm) and the indole moiety due to transitions of the p-p* type and an absorption band at k 3 = 355 nm. In the case of the thiosemicarbazone part of the molecule, no transitions which could be assigned to an n-p* type were observed in the spectra, since they are covered with the more intensive p-p* type [21,22]. The electronic spectra of H 2 MICT ligand show primer absorption band at 372 nm due to a transition of the thiosemicarbazone part of the molecule pp* type, 292 nm, and 244 nm due to the aromatic ring and the indole moiety.…”
Section: Uv Spectramentioning
confidence: 96%
“…These bands are attributed to π → π* and n → π* transitions [33][34][35]. The magnetic moment value for the Co(II) complex at 4.78 BM reported here indicates a high spin octahedral configuration with three unpaired electrons [36,37]. The electronic spectrum of the Co(II) complex gives two bands 410 and 500 nm.…”
Section: Electronic Spectra and Magnetic Measurementsmentioning
confidence: 69%
“…7 Porém, a estrutura do complexo de mercúrio (Figura 2) apresentada neste trabalho traz o ligante isatina-3-(N 4 -benziltiossemicarbazona) atuando como quelante bidentado, ou seja, a ocorrência da coordenação através do átomo de oxigênio doador é dependente da natureza do metal 4 e neste caso não é observada.…”
Section: Resultsunclassified
“…5,6 Tiossemicarbazonas provenientes de vários aldeídos e cetonas ocupam lugar especial entre os ligantes orgânicos, uma vez que apresentam vários átomos doadores e diferentes modos de coordenação, dependendo dos reagentes de partida e das condições de reação para sua obtenção. 7 Os derivados de tiossemicarbazonas são ótimos ligantes frente a metais de transição devido ao comportamento ácido do grupo NH imínico, que uma vez desprotonado provoca a deslocalização de carga ao longo da cadeia originando um ligante aniônico. 8 Do ponto de vista puramente químico, estes ligantes se apresentam versáteis com ampla capacidade quelante, além da possibilidade de ocorrência de ligações de hidrogênio formando estruturas poliméricas.…”
Section: Introductionunclassified