Synthese, Kristallstrukturen und thermisches Verhalten von (trienH2)[Mn(H2O)3X 3]X . H2O (X=Cl,Br) / Synthesis, Crystal Structures and Thermal Behavior of (trienH2)[Mn(H2O)3X3]X . H2O (X=Cl,Br)

• Published in: Zeitschrift für Naturforschung. B, A journal of chemical sciences Vol. 52; no. 9; pp. 1094 - 1102
• Main Authors: Feist, Michael, Trojanov, Sergej, Stiewe, Anja, Kemnitz, Erhard, Kunze, Ralf
• Format: Journal Article
• Language: English
• Published: Verlag der Zeitschrift für Naturforschung 01.09.1997
• Subjects: Crystal Structures; DTA-TG; Hydrogen Bonding; TG-MS; Thermal Analysis; Triethylene-diammonium Triaquatribromomanganate(II) Bromide Monohydrate; Triethylenediammonium Triaquatrichloromanganate(II) Chloride Monohydrate
• ISSN: 0932-0776; 1865-7117
• DOI: 10.1515/znb-1997-0914

The compounds (trienH )[Mn(H O) ]X · H O(X = Cl,Br) crystallize at room temperature from equimolar solutions of triethylenediamine and MnX · 4 H O in 3M HX in the orthorhombic space group P2 with a =6.828( 1), b = 12.128(2), c = 18.367(4) Å, Z = 4 for the chloride, and a = 7.001 (1), b = 12.651 (3), c = 18.885(4) Å, Z = 4 for the bromide, respectively. Both structures contain cations (trienH , complex octahedral anions [Mn(H O) , isolated halide ions and water molecules. The thermal behavior has been investigated on the basis of conventional thermoanalytical as well as TG-MS techniques. The thermal decomposition proceeeds in three stages, i.e. the dehydration forming (trienH )[MnX ], a phase transition of the tetrahalomanganates(II), and, finally, their decomposition which is influenced by the nature of the atmosphere. The dehydration step is reversible.