Chain, Network and Framework Formation in Uranyl Ion Complexes with 1,1??Biphenyl?3,3?,4,4??tetracarboxylate

1,1?-Biphenyl-3,3?,4,4?-tetracarboxylic acid dianhydride has been reacted with uranyl nitrate under solvo-hydrothermal conditions and in the presence of different counterions to give three complexes varying periodicity. [Co(en)3]- [UO2(bptc)(HCOO)] ? 2.5H2O (1) crystallizes as a monoperiodic coordination polymer which bptc4? ligand is exclusively bound through formation two 7-membered chelate rings. The [Co(en)3]3+ counterion essentially hydrogen bond donor, forming 15 bonds carboxylate water oxygen atoms. In [H2NMe2]2[UO2(bptc)] 0.5H2O (2), half forms ring, other bridges uranium atoms, resulting diperiodic network hcb topology, H2NMe2+ being located between undulating sheets. [PPh4]4[(UO2)4(bptc)3] 6H2O (3) contains mixture ligands either four 4-membered or rings, latter further bridging, gives triperiodic framework displaying large channels, each rows PPh4+ counterions. These results are compared those previous studies this ligand, similar phthalate ion, particular relation ring formation.