Abstract
(I) Mg2C20H24O18 monoclinic,PT,a=10.760(2) Å,b=11.052(2) Å,c=12.822(3) Å, α=105.31(3)o, β=98.18(3)o, γ=91.59(3)o,Z=2. (II) MgC10H14O10, monoclinic,C2/c,a=30.817(6)Å,b=10.499(2)Å,c=9.000(2)Å, β=91.31(3)o,Z=8. Magnesium in complexes with furoic acids reveals two ways of coordination: direct, when furoic anions are bonded to Mg2+ in an ionic fashion and outer-sphere, when cations bind water in the first coordination sphere and furancarboxylic ligands are hydrogen bonded to the water molecules. This results in the formation of three bridging systems: −Mg−Ocarboxyl−C−Ocarboxyl−Mg−, −Mg−Owater −Ocarboxyl−C−Ocarboxyl−C−Ocarboxyl−Mg−, and −Mg−Owater−Ocarboxyl−C−Ocarboxyl−Owater−Mg−. Magnesium 2-furancarboxylate (I) is dimeric, while magnesium 3-furancarboxylate (II) exhibits a polymeric structure.
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Paluchowska, B., Maurin, J.K. & Leciejewicz, J. Direct and outer-sphere coordination of the magnesium ions in the crystal structures of complexes with 2-furancarboxylic acid (I) and 3-furancarboxylic acid (II). J Chem Crystallogr 27, 177–182 (1997). https://doi.org/10.1007/BF02575986
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DOI: https://doi.org/10.1007/BF02575986