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A new cobalt(II) complex with a polychlorotriphenylmethyl radical ligand properly functionalized with a carboxylate group (PTMMC−), [Co(PTMMC)2(py)2(H2O)2]·[Co(PTMMC) (py)3(H2O)(Cl)]2·2py·2THF (3), has been synthesized and characterized including single-crystal X-ray diffraction. The structure of 3 consists of two different Co(II) units, [Co(PTMMC)2(py)2(H2O)2] (3A) and [Co(PTMMC) (py)3(H2O)(Cl)]...
The isomeric trans-1 and cis-1 radicals have been studied by EPR spectroscopy. At 220 K, the EPR spectrum of the trans-1 isomer shows a hyperfine structure corresponding to the coupling of the unpaired electron with the different nuclei with non-zero magnetic moments. In contrast, the EPR spectrum of the cis-1 isomer at similar temperatures shows the characteristic structure of a triplet species....
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