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New k1,k1-benzoato-bridged complexes of Eu(III) and Tb(III) with a triazine-benzamide ligand
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Two new complexes of Eu(III) and Tb(III) with the new ligand N,N',N''-(1,3,5-triazine-2,4,6-triyl)tribenza mide (TBZM) and benzoate (BA) have been isolated and crystallog. characterized. [Tb(BA)2(TBZM)(H2O)]2(CF3SO3)2�H3CN�2O, 1, crystallizes in the triclinic P-1 lattice with unit cell parameters a = 11.3018(8), b = 14.3390(5), c = 16.4758(5) �, ? = 114.036(2)�, ? = 106.112(2)�, ? = 90.916(2)� and V = 233.40(14) � The related complex [Eu(BA)2(TBZM)(H2O)]2(NO3)2�.4H2O, 2, crystallizes in the triclinic P-1 lattice with unit cell parameters a = 12.2537(2), b = 13.0210(3), c = 15.7362(3) �, ? = 71.083(1)�, ? = 80.628(1)�, ? = 80.910(1)� and V = 2328.55(8) � Both complexes display the metal center with coordination no. 8 in a square-antiprismatic geometry. Extensive hydrogen-bonding interactions, which extend the homobinuclear mols. into three-dimensional architectures, are present in both compds. In the first case, triflate counter-ions, benzoate ligands and solvent water and acetonitrile mols. and, in the second case, the TBZM ligands, nitrate counter-ions and solvent water mols. are involved in these interactions. Finally, in the Eu(III) complex, the three-dimensional structure is further supported by ?-? interactions involving benzamide Ph rings and triazine rings. [on SciFinder(R)]