Copper(II) Coordination Polymers Generated from 1,3-Bis(4-pyridyl)propane: Synthesis, Structures, and Spectroscopic Studies

This paper describes the synthesis and structural characterization of two new one-dimensional coordination polymers involving 1,3-bis(4-pyridyl)propane ligand named {(mu-NCS)(2)[Cu(bpp)]center dot dmf}(n) (1) and {[Cu(mebpy)(bpp)(dmso)](ClO4)(2)center dot dmso}(n) (2) (bpp = 1,3-bis(4-pyridyl)propane and mebpy = 4,4'-dimethyl-2,2'-bipyridine). These compounds were characterized by means of elemental analysis, thermal analysis (TG/DTA), vibrational spectroscopy (IR and Raman) and had their structures determined by single-crystal X-ray diffraction analysis. Compound 1 consists of CuN4 coordination spheres with bpp ligands in the unusual GG conformation coordinated in bridges between Cu-II centers to form a wavelike 1-D coordination polymer. On the other hand, in compound 2 the bpp ligand adopts the TT conformation in bridging mode extending the 1D cationic polymeric chain.