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http://hdl.handle.net/10773/6105
Título: | Synthesis, characterisation and magnetic properties of cobalt (II) complexes with 3-hydroxypicolinic acid (HpicOH): [Co(picOH)2(H2O)(2)] and mer-[N(CH3)(4)][Co(picOH)(3)] . H2O |
Autor: | Girginova, Penka I. Almeida Paz, Filipe A. Nogueira, Helena I. S. Silva, Nuno J. O. Amaral, Vítor S. Klinowski, Jacek Trindade, Tito |
Palavras-chave: | Cobalt complexes Crystal structures 3-Hydroxypicolinic acid Magnetic properties |
Data: | Mar-2005 |
Resumo: | Two complexes with Co2+ and 3-hydroxypicolinic acid, [Co(picOH)2(H2O)2] (I) and mer-[N(CH3)4][Co(picOH)3] Æ H2O (II), have been synthesised and characterised using single-crystal X-ray diffraction, elemental analysis, infrared spectroscopy, and thermoanalytical measurements. The 3-hydroxypicolinate ligands are coordinated to the Co2+ centres via its typical N,O-chelating coordination fashion. While in I the presence of two coordinated water molecules leads to the formation of a neutral [Co(picOH)2(H2O)2] complex which is strongly hydrogen bonded to another four neighbouring complexes, in II the inclusion of a third picOH ligand leads to an anionic octahedral complex, [Co(picOH)3] , in which all the N- and O-atoms are occupying mer positions. The properties of these two compounds were further investigated by measuring their magnetic behaviour. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/6105 |
DOI: | 10.1016/j.poly.2005.01.002 |
ISSN: | 0277-5387 |
Aparece nas coleções: | CICECO - Artigos DFis - Artigos DQ - Artigos |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Polyhedron 24 (2005) 563 –569.pdf | 583 kB | Adobe PDF |
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