Abstract
The structure-directing effect of counterions with different shapes and charges has been investigated in the case of the complexes formed by uranyl ions with pimelic (heptanedioic) acid (H2C7) under solvo-hydrothermal conditions. Following the previously reported isolation of one-dimensional (1D) chains with the counterions [Fe(bipy)3]2+ and [Cu(phen)2]+, the complex [Ni(Me4phen)3]2[(UO2)4(C7)3(NO3)6]·CH3CN (1), with a bulkier cation, was synthesized and shown to consist of molecular anionic tetranuclear uranyl species, the presence of coordinated nitrate ions preventing polymerization. 1D zigzag chains are formed in [Ag(bipy)2]2[UO2(C7)(NO3)]2 (2), in which the cations, assembled into dimers through argentophilic interactions, are organized in columns through π-stacking interactions. The heterometallic complex [UO2Mn(C7)2(phen)2] (3) is formed in the presence of manganese(II) cations, and it crystallizes as a two-dimensional (2D) assembly in which manganese dimers display weak antiferromagnetic coupling ...
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