Bis(3-aminobenzenesulfonato-N)-diaqua-bis(N,N'-dimethylformamide-O)-copper(II)

Reaction of 3-aminobenzenesulfonic acid (HL1) with Cu(NO3)(2)& BULL;2.5H(2)O in H2O/DMF leads to the formation of the new bis(3-aminobenzenesulfonato-& kappa;N)-diaqua-bis(dimethylformamide-& kappa;O)-copper(II) complex [Cu(L1)(2)(DMF)(2)(H2O)(2)] (1) (HL1 = 3-aminobenzenesulfonic acid and DMF = N,N-dimethylformamide). Single crystal X-ray analysis reveals that the hexacoordinated copper(II) center adopts a distorted octahedral geometry with trans-oriented two 3-aminobenzenesulfonate ligands (L1(-)), two water and two dimethylformamide (DMF) molecules. Comparison of its crystal structure with that of the known bis(4-aminobenzenesulfonato-& kappa;N)diaquabis(dimethylformamide-& kappa;O)-copper(II) complex [Cu(L2)(2)(DMF)(2)(H2O)(2)] (2) (HL2 = 4-aminobenzenesulfonic acid) discloses that 1 and 2 are the isomers with an identical empirical formula (C18H30CuN4O10S2) and equal numbers of same coordinated solvents (DMF and water). H-bonded supramolecular structures and their corresponding topological analyses revealed a 2D with 6-connected hxl/Shubnikov plane net (3,6) for 1 and a 3D with 8-connected bcu; 8/4/c1; sqc3 net for 2, which are completely different.

Automated summary

The reaction between 3-aminobenzenesulfonic acid and Cu(NO3)(2)& BULL;2.5H(2)O in H2O/DMF solution produces a new copper(II) complex. The crystal structure analysis reveals that the complex has a distorted octahedral geometry. Comparison with a known copper(II) complex shows that they have the same empirical formula and coordinated solvents, but different structures.