Magnetic, thermal and spectral characterization of 2,4-dimethoxybenzoates of Mn(II), Co(II) and Cu(II)


Autoria(s): Ferenc,W.; Czapla,K.; Sarzy,J.
Data(s)

01/01/2007

Resumo

2,4 - Dimethoxybenzoates of Mn(II), Co(II) and Cu(II) have been synthesized as hydrated or anyhydrous polycrystalline solids and characterized by elemental analysis, IR spectroscopy, magnetic studies and X-ray diffraction measurements. They possess the following colours: Mn(II) - white, Co(II) - pink and Cu(II) - blue. The carboxylate groups bind as monodentate, or a symmetrical bidentate bridging ligands and tridentate. The thermal stabilities were determined in air at 293-1173K. When heated the hydrated complexes dehydrate to from anhydous salts which are decomposed to the oxides of respective metals. The magnetic susceptibilites of the 2,4-dimethoxybenzoates were measured over the range 76-303 K and their magnetic moments were calculated. The results reveal the complexes of Mn(II), Co(II) to be high-spin complexes and that of Cu(II) to form dimer.

Formato

text/html

Identificador

http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-46702007000300001

Idioma(s)

en

Publicador

Fundação Editora da Universidade Estadual Paulista Júlio de Mesquita Filho - UNESP

Fonte

Eclética Química v.32 n.3 2007

Palavras-Chave #2,4-dimethoxybenzoates #magnetic properties of Mn(II), Cu(II), Co(II) and Nd(III) #thermal stability #IR spectra
Tipo

journal article