Sequence of Structural and Magnetic Phase Transitions in (NO)Mn 6 (NO 3 ) 13

• Published in: Inorganic chemistry Vol. 63; no. 11; pp. 5199 - 5207
• Main Authors: Vorobyova, Anna A, Morozov, Igor V, Vasilchikova, Tatyana M, Zakharov, Konstantin V, Ovchenkov, Yevgeny A, Chistyakov, Gregory D, Ivanova, Anna G, Shvanskaya, Larisa V, Lyssenko, Konstantin A, Pchelkina, Zlata, Vasiliev, Alexander N, Volkova, Olga S
• Format: Journal Article
• Language: English
• Published: United States 18.03.2024
• ISSN: 0020-1669; 1520-510X
• DOI: 10.1021/acs.inorgchem.4c00180

New nitrosonium manganese(II) nitrate, (NO)Mn (NO ) , has been synthesized and structurally characterized. In the temperature range of 45-298 K, the crystal is hexagonal (centrosymmetric sp. gr. 6 / ). Mn ions are assembled into tubes along axis with both NO filling and coating. The nitrosonium cation is located in the framework cavity and is disordered by a 3-fold axis. At the temperature = 190 K, a structural phase transition related to the libration of the intertube NO group and a small variation of Mn polyhedron is observed. Moreover, the anomalies in physical properties of (NO)Mn (NO ) allow suggesting that ordering of NO units occurs at low temperatures. The antiferromagnetic ordering in this compound is preceded by the formation of a short-range correlation regime at about 25 K and takes place in two steps at = 12.0 K and = 8.4 K.