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- W2049763042 abstract "Reaction of nickel(II) acetate with H3L (2-(5-bromo-2-hydroxyphenyl)-1,3-bis[4-(5-bromo-2-hydroxyphenyl)-3-azabut-3-enyl]-1,3-imidazolidine) yields [Ni2L(OAc)(H2O)2]·3MeCN·2H2O (1·3MeCN·2H2O), crystallographically characterized. 1 is unstable in solution for a long time and hydrolyzes to give [Ni2L(o-OC6H3BrCHO)(H2O)]·2.25MeCN·H2O (2·2.25MeCN·H2O). In addition, 1 uptakes CO2 from air in a basic methanol/acetonitrile solution, yielding {[Ni2L(MeOH)]2(CO3)}·1.5MeOH·MeCN·H2O (3·1.5MeOH·MeCN·H2O). The X-ray characterization of 3 reveals that it is a tetranuclear nickel cluster, which can be considered as the result of a self-assembly process from two dinuclear [Ni2L]+ blocks, joined by a μ4-η2:η2-O,O carbonate ligand. The coordination mode of the carbonate anion is highly unusual and, to the best of our knowledge, it has not been described thus far for first-row transition metal complexes or magnetically studied until now. Magnetic characterization of 1 and 3 shows net intramolecular ferromagnetic coupling between the metal atoms in both cases, with S = 2 and S = 4 ground states for 1 and 3, respectively." @default.
- W2049763042 created "2016-06-24" @default.
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- W2049763042 date "2005-12-06" @default.
- W2049763042 modified "2023-10-18" @default.
- W2049763042 title "Self-Assembly of a Tetranuclear Ni<sub>4</sub> Cluster with an <i>S</i> = 4 Ground State: The First 3d Metal Cluster Bearing a μ<sub>4</sub>-η<sup>2</sup>:η<sup>2</sup>-O,O Carbonate Ligand" @default.
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- W2049763042 doi "https://doi.org/10.1021/ic051194s" @default.
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