Spectral, thermal and magnetic characterization of 2, 3-dimethoxybenzoates of Co(II), Ni(II) and Cu(II)

• Main Authors: Ferenc Wieslawa, Walkow-Dziewulska Agnieszka, Sadowsk Pawel, Chrusciel Janusz
• Format: Article
• Language: English
• Published: Serbian Chemical Society 2005-01-01
• Series: Journal of the Serbian Chemical Society
• Subjects: 2,3-dimethoxybenzoates of co(ii); ni(ii); cu(ii); thermal stability; magnetic properties; electronic spectra of complexes
• Online Access: http://www.doiserbia.nb.rs/img/doi/0352-5139/2005/0352-51390506833F.pdf

Complexes of 2,3-dimethoxybenzoates of Co(II), Ni(II) and Cu(II) have been synthesized as hydrated or anhydrous polycrystalline solids and characterized by elemental analysis, IR, FIR and electronic spectroscopy, magnetic studies and X-ray diffraction measurements. The carboxylate groups bind as monodentate or symmetrical, bidentate chelating and bridging ligands. The thermal stabilities were determined in air. When heated they dehydrate to form anhydrous salts which are decomposed to the oxides of the respective metals. The magnetic susceptibilities of the complexes were measured over the range 77–300 K and the magnetic moments were calculated. The results show that the complexes of Ni(II) and Co(II) are high-spin complexes and that of Cu(II) forms a dimer.