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In the crystal structure of the title compound, [Mn(C5H7O2)2(C12H8N2)], the Mn2+ cation is coordinated by one bidentate 1,10-phenanthroline ligand and two acetyl­acetonate anions within a slightly distorted N2O4 octa­hedron. The asymmetric unit consists of one Mn2+ cation situated on a twofold rotation axis, one half of a 1,10-phenanthroline ligand and one acetyl­acetonate anion. In comparison with the previous determination based on visually estimated intensities recorded on precession photographs, the current redetermination with image-plate data reveals bond lengths and angles with much higher precision.

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In the crystal structure of the title compound, [Mn(C5H7O2)2(NCS)(C5H5N)], the Mn3+ cation is coordin­ated by two acetyl­acetonate anions, one terminal thio­cyanate anion and one pyridine ligand within a slightly distorted octa­hedron. The asymmetric unit consists of half a complex mol­ecule with the Mn3+ cation, the thio­cyanate anion and the pyridine ligand located on a mirror plane. The acetyl­acetonate anion is in a general position. The title compound was previously described [Stults et al. (1975). Inorg. Chem. 14, 722–730] but could only be obtained as a powder. Suitable crystals have now been obtained for a high-precision single-crystal structure determination.
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