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Original Article

ECB. 2015; 4(10): 471-476


PHASE POLYMORPHISM OF [M(OS(CH3)2)6](ClO4)2 (M=Mn(II) AND Zn(II) STUDIED BY TRANSMITTED LIGHT INTENSITY AND POLARIZED OPTICAL MICROSCOPY MEASUREMENTS

E. Szostak, A. Migdał-Mikuli, J. Chruściel, A. Rudzki.



Abstract
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The transmitted light intensity (TLI) and polarized optical microscopy (POM) measurements of [Mn(OS(CH3)2)6](ClO4)2 and
[Zn(OS(CH3)2)6](ClO4)2, as a function of temperature, showed that only some of the phase transitions discovered earlier for these
compounds by the differential scanning calorimetry were now observed as anomalies on the TLI curves and as different textures in POM
pictures. Above-mentioned methods indicated that discovered phases of both compounds were the crystalline phases with different
orientational dynamical disorder. Additionally, it was confirmed that these both compounds melt at 488 and 465 K, respectively.

Key words: hexakis(dimethylsulphoxide)manganese(II) tetraoxochlorate(VII); hexakis(dimethylsulphoxide)zinc tetraoxochlorate(VII); phase transitions; melting points; transmitted light intensity; polarized optical microscopy.





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