Synthetic Route of C8H12O4. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: cis-Cyclohexane-1,2-dicarboxylic acid, is researched, Molecular C8H12O4, CAS is 610-09-3, about Counterion-Controlled Formation of an Octanuclear Uranyl Cage with cis-1,2-Cyclohexanedicarboxylate Ligands. Author is Thuery, Pierre; Atoini, Youssef; Harrowfield, Jack.
Cis-1,2-Cyclohexanedicarboxylic acid (c-chdcH2) was reacted with uranyl nitrate under (solvo-)hydrothermal conditions in the presence of different possible counterions. Two neutral complexes of 1:1 stoichiometry were obtained, [UO2(c-chdc)(DMF)] (1) and [UO2(c-chdc)(H2O)] (2), which crystallize as two-dimensional coordination polymers and do not include the addnl. cations present in solution In contrast, the complex [NH4][PPh4][(UO2)8(c-chdc)9(H2O)6]•3H2O (3) crystallized in the presence of PPh4Br, ammonium cations being generated in situ from acetonitrile hydrolysis. This complex of 8:9 uranium:ligand stoichiometry contains an octanuclear anionic cage of D3 symmetry with a pseudo-cubic arrangement of uranium atoms. The ammonium cation is held within the cage through four hydrogen bonds with uranyl oxo groups directed inwards. This cage complex is luminescent, although with a low quantum yield of 0.06, indicating some potential as a photo-oxidant of included species.
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