1353054-78-0Relevant academic research and scientific papers
A new family of homo- and heterometallic manganese complexes at high oxidation states derived from the oxidation of MnII with Ce IV: Syntheses, structures, and magnetic properties
Ma, Cheng-Bing,Hu, Ming-Qiang,Chen, Hui,Chen, Chang-Neng,Liu, Qiu-Tian
, p. 5043 - 5053 (2011)
A series of homo- and heterometallic manganese(III or IV) clusters, [Mn2O2(pybim)4](NO3) 4·11H2O [1; pybim = 2-(2-pyridyl)benzimidazole], [Mn3O4(bipy)4(H2O) 2][Ce(NO3)5(H2O)][NO 3]2·2H2O (2; bipy = 2,2′- bipyridine), [Mn2Ce3O6(pta)6(NO 3)2(dmf)4]·H2O (3; Hpta = p-toluic acid), and [Mn8CeO8(pta)12(dmf) 4] (4), were prepared by the reaction of simple Mn2+ salts with (NH4)2[Ce(NO3)6] under different experimental conditions. The single-crystal X-ray diffraction analyses established that these complexes possess inorganic cores that have various structural topologies, which range from the [Mn2O2] 4+ rhomb, a Mn3 triangle within [Mn3O 4]4+, and the nonplanar [Mn8O8] 8+ loop that centrally traps a Ce4+ ion to the [Mn 2Ce3O6]8+ cage that contains a Mn2Ce3 trigonal bipyramid. The solid-state magnetic susceptibility studies revealed that these four complexes possess distinctly different magnetic properties, namely, both 1 and 2 show strong antiferromagnetic interactions between the MnIV centers, whereas 3 is weakly antiferromagnetic, and 4, however, has predominantly ferromagnetic interactions. Four Mn or mixed Mn/Ce clusters at high oxidation states were prepared by the reaction of Mn2+ salts where (NH4) 2[Ce(NO3)6] was used as an oxidizing agent. These complexes possess inorganic cores that have topologies that range from the rhomb, the triangle, and the nonplanar loop to the trigonal bipyramid. The four complexes possess distinctly different magnetic properties.
