Two different 1D-chains in the structures of the copper(I) coordination polymers based on bidentate Schiff-base building units and thiocyanate anions as bridging ligands

摘要

The reaction of the bidentate Schiff-base ligands (3,4,5-MeO-ba)(2)en (L-1) and (4-Me-ba)(2)en (L-2) with Cu(SCN) in CH3CN yielded two copper(I) coordination polymers [Cu(L-1)(SCN)](n) (1) and [Cu(L-2)(SCN)](n) (2), which have been characterized by elemental analyses, IR- and H-1 NMR-spectroscopy, and X-ray crystallography. The non-centrosymmetric structures of both Cu(I) complexes consist of an one-dimensional polymeric chain in which copper(I) ions are bridged by two thiocyanate groups bonding in an end-to-end fashion. The Cu(I)center dot center dot center dot Cu(I) separation is 5.604 angstrom in 1 and 5.706 angstrom in 2.