The synthesis of a homochiral building block based on L-tartrate-chromium(III) complex anions is reported. The dinuclear complex anion, which contains two bridging L-tartrate ligands and one aromatic N-donor ligand coordinated to chromium(III) ions, exhibits a boat conformation in which intramolecular resonance-assisted hydrogen bonding is present. The sodium L-tartrate-chromium(III) compound with the formula Na[Cr(bpy)(L-tart)H]·9HO (1) crystallizes from a methanol-water solution as a high water content material in the monoclinic space group 2.
View Article and Find Full Text PDFThis study demonstrates the reversible structural transformation, single-crystal-to-single-crystal, of the ammonium vanadyl (-tartrate) complex salt from the hydrate phase to the anhydrous phase. The transformation can be initiated by stimuli, such as temperature, humidity, or vacuum conditions. The hydrate and anhydrous phases exhibit a tetragonal structure (422), with marked differences in hydrogen bonding due to the presence or absence of one water molecule per asymmetric unit.
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