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A discrete neutral transition-metal citrate cubane with an M4O4 core; coordinative versatility of the [MII4(citrate)4]8- fragment

AuthorsFalvello, Larry R.; Forcén-Vázquez, E.; Palacio, Fernando; Sanz, Sergio; Tomás, Milagros
Issue Date2014
PublisherRoyal Society of Chemistry (UK)
CitationDalton Transactions 43(28): 10700-10704 (2014)
AbstractThe neutral cluster [MnII 8(citrate) 4(H2O)18] is formed by the [M 4(citrate)4]8- fragment, with an Mn 4O4 cubane core, which bonds four peripheral aquomanganese units-two [Mn(H2O)4]2+ and two [Mn(H 2O)5]2+-through a total of six metal-ligand bonds, giving a discrete neutral compound. The compound presents a unique coordination mode in which the citrate cubane acts as a chelate to each of the two peripheral [Mn(H2O)4]2+ (tetra-aquo) units. A detailed analysis of the central and peripheral geometries is given in terms of the tetrahedral distortions of key structural features. A reversible dehydration-rehydration process has been observed in a polycrystalline sample of the complex, whose structure lacks pores or channels. © 2014 the Partner Organisations.
Identifiersdoi: 10.1039/C4DT01085J
issn: 1477-9226
e-issn: 1477-9234
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(ISQCH) Artículos
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