Experimental and theoretical (DFT) studies on poly[octa-μ3-acesulfamato-O,O:N,Oʹ;Oʹ,N:O,O-tetraaquatetrabarium(II)] and poly[octa-μ3-acesulfamato-O,O:N,Oʹ;Oʹ,N:O,O-tetraaquatetrastrontium(II)] complexes

Hasan İçbudak, Güneş Demirtaş, Necmi Dege


Two new one-dimensional coordination polymers of barium (II) and strontium (II)-acesulfamato complexes such as [Ba(C4H4NO4S)2(H2O)]n (1) and [Sr(C4H4NO4S)2(H2O)]n (2) have been synthesized and their molecular structures were identified by X-ray diffraction technique. Both barium (II) and strontium (II) complexes crystallize in the centrosymmetric monoclinic space group P121/c1 and barium (II) and strontium (II) ions, which are surrounded by O- and N-atoms, have the coordination number of nine. Each complex forms a structure like a polymer extending parallel to the a-axis. The molecular structures of those complexes were stabilized by O―H···O and C―H···O hydrogen bonds.

Besides identifying their crystallographic structures, the geometric parameters were also calculated using density functional theory (B3LYP) with 6-31G base sets for the asymmetric units of the complexes. The calculated geometrical parameters were also compared to the geometric parameters of X-ray diffraction technique. Furthermore, molecular electrostatic potential maps were constructed and frontier molecular orbital calculations were done for the synthesized complexes. The results of the experimental and theoretical IR studies were also compared.


Acesulfamato ligand; Barium (II) complex; Strontium (II) complex; Density Functional Theory.

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DOI: http://dx.doi.org/10.20450/mjcce.2015.634


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