Comparison of some properties of Cu(II) 2,3- , 3,5- and 2,6-dimethoxybenzoates


Autoria(s): Ferenc,W.; Walków-Dziewulska,A.; Sarzyski,J.; Paszkowska,B.
Data(s)

01/01/2006

Resumo

The physico-chemical properties and thermal stability in air of Cu(II) 2,3- , 3,5- and 2,6-dimethoxybenzoates were compared and the influence of the position of -OCH3 substituent on their thermal stability was investigated. The complexes are crystalline, hydrated salts with blue colour. The carboxylate ion is a bidentate chelating or bridging group. The thermal stability of analysed Cu(II) dimethoxybenzoates was studied in the temperature range of 293-1173 K. The positions of methoxy- groups in benzene ring influence the thermal properties of studied complexes. Their different thermal properties are markedly connected with the various influence of inductive, mesomeric and steric effects of -OCH3 substituent on the electron density in benzene ring. The magnetic susceptibilities of the complexes were measured over the range of 76-300 K and the magnetic moments were calculated. The results show that they form dimers.

Formato

text/html

Identificador

http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-46702006000300001

Idioma(s)

en

Publicador

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

Fonte

Eclética Química v.31 n.3 2006

Palavras-Chave #dimethoxybenzoates #complexes of Cu(II) #magnetic moments #thermal behavior #FTIR spectra
Tipo

journal article