| Autor: |
Wieslawa Ferenc, A. Walków-Dziewulska, J. Sarzyski, B. Paszkowska |
| Jazyk: |
angličtina |
| Rok vydání: |
2018 |
| Předmět: |
|
| Zdroj: |
Eclética Química, Vol 31, Iss 3, Pp 7-14 (2018) |
| Druh dokumentu: |
article |
| ISSN: |
1678-4618 |
| DOI: |
10.26850/1678-4618eqj.v31.3.2006.p7-14 |
| Popis: |
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 –OCH 3 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 –OCH 3 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. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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