2D polymeric copper(I) complexes.: Synthesis and characterizations of [Cu(pyza)2X]n (X = CN, NCS and N3, and pyza = pyrazinecarboxamide) and X-ray crystal structures of the cyano and thiocyanato complexes

Three new copper(I) complexes of the type Cu(pyza)(2)X, (X = CN(1)- NCS(2) and N-3: pyza = pyrazinecarboxamide) have been prepared and characterized by spectroscopic and single crystal analyses showing 2D polymeric structures. The electronic, IR and Raman spectra of the cyano and thiocyanato complexes are measured and discussed. The structures of 1 and 2 are very similar featuring end-to-end bridging CN or NCS groups. forming chains connected via hydrogen bonds between the monodentate pyza of these complexes. Complex 2 displays solid state visible emission spectra when irradiated in the UV region at room temperature.