Coordination networks of 2,3-bis(4,5-dimethylthio-1,3-dithiole-2-ylldene)succinonitrile with silver salts: A study of network connectivity and topology as a function of counterion

摘要

Complexes of 2,3-bis(4,5-dimetliylthio-1,3-dithiole-2-ylidene)succinonitrile (L) with AgX salts (X = NO3-,CF3SO3-) have been prepared and fully characterized by elemental analysis, 1R and single-crystal X-ray analysis. The structural topology in the solid state is found to depend on the type of counterions. With AgNO3, a 3D coordination network of composition [Ag-2(L)(NO3)(2)](n) (1) forms in which Ag(I) is six-coordinated, bonding to two sulfur atoms of ligand L, a neighboring ligand nitrogen atom and totally three oxygen atoms of bridging nitrate anions. Changing the counterion to triflate produces a 2D coordination network of composition [Ag-2(L)(CF3SO3)(2)](n) (2) in which Ag(I) is five-coordinated and bonds to two sulfur atoms of ligand L and totally three oxygen atoms of bridging triflate anions. Obviously, in the latter case, the nitrile groups of L are non-coordinating.