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Phase Polymorphism of [Mn(DMSO)6

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Phase Polymorphism of [Mn(DMSO)

6

](ClO

4

)

2

Studied by Differential Scanning Calorimetry

Anna Migdał-Mikuli and El˙zbieta Szostak

Department of Chemical Physics, Faculty of Chemistry, Jagiellonian University, ulica Ingardena 3, 30-060 Krak´ow, Poland

Reprint requests to Dr. hab. A. M.-M.; Fax: +48-12-634-0515; E-mail: migdalmi@chemia.uj.edu.pl Z. Naturforsch. 60a, 289 – 295 (2005); received January 13, 2005

Six solid phases of [Mn(DMSO)6](ClO4)2have been detected by differential scanning calorimetry.

The phase transitions were found between the following solid phases: stable KIcstable KIb at TC5=225 K, metastable KIII↔metastable KII at TC4=322 K, stable KIb→stable KIa at TC3= 365 K, metastable KII↔overcooled K0 at TC2=376 K and stable KIa→stable K0 at TC1=379 K.

The title compound melts at Tm=488 K.

Key words: Hexadimethylsulphoxidemanganese(II) Chlorate(VII); Phase Transitions;

Melting Point; DSC.

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