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首页> 外文期刊>Journal of thermal analysis and calorimetry >Spectral, magnetic and thermal investigations of some d-electron element 3-methoxy-4-methylbenzoates
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Spectral, magnetic and thermal investigations of some d-electron element 3-methoxy-4-methylbenzoates

机译：Spectral, magnetic and thermal investigations of some d-electron element 3-methoxy-4-methylbenzoates

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摘要

Conditions for the preparation of Mn(II), Co(II), Ni(II), Cu(II), Zn(II) and Cd(II) 3-methoxy-4-methylbenzoates were investigated and their quantitative composition and magnetic moments were determined. The IR spectra and powder diffraction patterns of the complexes prepared of general formula M(C9H9O3)(2)center dot nH(2)O (n=2 for Mn, Co n=1 for Ni, Cu, n=0 for Zn, Cd) were prepared and their thermal decomposition in air was studied. Their solubility in water at 293 K is of the order 10(-2) (Mn)-10(-4) (Cu) mol dm(-3). IR spectra of the prepared 3-methoxy-4-methylbenzoates suggest that carboxylate groups are bidentate bridging. The magnetic moments for the paramagnetic complexes of Mn(II), Co(II), Ni(II) and Cu(II) attain values 5.50, 4.45, 3.16 and 1.79 B. M., respectively. During heating the hydrated complexes lose crystallization water molecules in one step and then the anhydrous complexes decompose directly to oxides MO and Mn3O4. Only Co(II) complex decomposes to Co3O4 with intermediate formation CoO.

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