Journal
ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS
Volume 68, Issue -, Pages M7-M11Publisher
WILEY-BLACKWELL
DOI: 10.1107/S0108270111050293
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- Ferdowsi University of Mashhad
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4-Hydroxypyridine-2,6-dicarboxylic acid (chelidamic acid, cdaH(3)) reacts with MnCl2 center dot 2H(2)O in the presence of 2-amino-4-methylpyrimidine in water to afford the tetranuclear title complex, [Mn-4(C8H3NO5)(4)(H2O)(10)]center dot 3.34H(2)O, built through carboxylate bridging. The tetranuclear complex sits on a centre of inversion at (1/2, 1/2, 1/2). In the crystal, discrete undecameric (H2O)(10.34) water clusters (involving both coordinated and uncoordinated water molecules, with one site of an uncoordinated water molecule not fully occupied) assemble these tetranuclear Mn-II complex units via an intricate array of hydrogen bonding into an overall three-dimensional network. The degree of structuring of the (H2O)(10.34) supramolecular association of water molecules observed in the present compound, imposed by its environment and vice versa, will be discussed in comparison to that observed for the (H2O)(14) supramolecular clusters in the case of the dinuclear complex [Mn-2(cdaH) (2)(H2O)4]center dot 4H(2)O [Ghosh et al. (2005). Inorg. Chem. 44, 3856-3862].
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