Manganese(II) Oxazolidine Nitroxide Chelates: Structure, Magnetism, and Redox Properties
AUSTRALIAN JOURNAL OF CHEMISTRY（2014）
Abstract
The mononuclear oxazolidine nitroxide complex [Mn-II(L-center dot)(2)](ClO4)(2) (1) (L-center dot, 4-dimethyl-2,2-di(2-pyridyl)oxazolidine N-oxide) has been synthesized and investigated using single-crystal X-ray diffraction, variable-temperature magnetic susceptibility measurements, and electrochemistry. The structural analysis reveals bond lengths compatible with a linear L-center dot-Mn-II-L-center dot arrangement where the ligands are in the neutral ligand form and the central Mn-II ion is high spin (S=5/2). Although analysis of the variable-temperature magnetic susceptibility data suggests a strong antiferromagnetic metal-radical interaction, the radical-radical intramolecular interaction could not be determined unambiguously from such fits. The resultant isolated S=3/2 ground state is confirmed by low-temperature magnetization versus field measurements. Electrochemical studies reveal similar square schemes and redox intermediates to the previously reported analogues [Fe-II(L-center dot)(2)][BF4](2) and [Co-II(L-center dot)(2)][NO3](2).
MoreTranslated text
Key words
supramolecular chemistry,analytical chemistry,green chemistry,polymer chemistry,crystal structures,macromolecules,peptide,ab initio calculations,density functional theory,electrochemistry,sensors,amino acids,biological chemistry,catalysis,combinatorial chemistry,interfaces,mass spectrometry,kinetics,spectroscopy,organic chemistry,quantum chemistry,biosensors,inorganic chemistry,colloids,nanotechnology,proteins,photochemistry,computational chemistry,physical chemistry,medicinal chemistry,reaction mechanisms,surface chemistry,crystallography,self assembly,combinatorial,enzymes,ionic liquids,structure,biocatalysis,educational,pharmaceutical chemistry
AI Read Science
Must-Reading Tree
Example
Generate MRT to find the research sequence of this paper
Chat Paper
Summary is being generated by the instructions you defined