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- W2068836479 abstract "A new 24-membered octaaza macrocyclic ligand (L) containing two methoxybenzyl pendant arms has been synthesized. While its complexation with MnCl2 in the presence of perchlorate anion yielded a mononuclear complex, [MnL](ClO4)2, a similar reaction in the absence of perchlorate anion led to an endocyclic dinuclear complex, [Mn2LCl4]. In [MnL](ClO4)2, the Mn(II) ion was tightly surrounded by the N8-macrocyclic ligand to form a distorted bicapped octahedral geometry. In [Mn2LCl4], the endomacrocyclic bound two manganese ions are bridged via two chloro ligands to form a bis-(μ-chloro) Mn2Cl2 diamond core. Each Mn(II) ion in the dinuclear complex is additionally ligated with a diaminomethyl pyridinyl nitrogen donor atom of the ligand and a terminal chloride, which leads to a distorted octahedral geometry of the N3Cl3 donor set. An EPR study of [MnL](ClO4)2 in DMSO or DMF showed an unprecedented Mn(II) EPR signal spreading from ∼100 G over ∼7000 G with 55Mn nuclear hyperfine structures at 600–1800 G. For [Mn2LCl4], a typical high-spin Mn(II) signal was observed near g = ∼2 with an average 55Mn nuclear hyperfine coupling constant of 91 G and small ZFS." @default.
- W2068836479 created "2016-06-24" @default.
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- W2068836479 date "2008-06-01" @default.
- W2068836479 modified "2023-10-12" @default.
- W2068836479 title "Synthesis and characterization of mononuclear and dinuclear Mn complexes with N,N′-disubstituted octaaza macrocycle" @default.
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- W2068836479 doi "https://doi.org/10.1016/j.poly.2008.03.021" @default.
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