Abstract
Two complexes of dimethyl pyridine-2,6-dicarboxylate (L), [CdL3][CdI4] (1) and [Ag(L)NO3]n (2) were prepared and identified by elemental analysis, FT-IR, Raman and 1H NMR spectroscopy, cyclic voltammetry, and single-crystal X-ray diffraction. The crystal structure of 1 contains both complex cation and complex anion of the metal. Cadmium in [CdL3]2+, coordinated by three nitrogens and six oxygens, has a distorted tricapped trigonal prismatic geometry while [CdI4]2−, with four coordinated iodides, has a slightly distorted tetrahedral geometry. In the crystal structure of 2, silver has distorted tetrahedral geometry by coordination of nitrogen and three oxygens. One oxygen of nitrate in 2 bridges two silvers. Extension of these bridges forms a 1-D coordination polymer. Cyclic voltammetry of L reveals two reduction steps which are shifted after coordination in 1, while no significant shifts are observed in 2. Hydrogen bonds including C–HI, C–H
O and C–H
C and short interactions such as C
I,
, and
O are compared with Cambridge Structural Database analogs . Two brief structural surveys on ligand coordination modes and silver polymers are also presented.
Acknowledgement
We are grateful to Payame Noor University of I. R. Iran for financial support.