Thermal, spectroscopic and structural studies of dimeric and polymeric mixed-ligands cadmium(II) complexes, [Cd(phen)2(bpe)(H2O)](ClO4)2 · H2O and [Cd(bpp)2(H2O)2](ClO4)2 · bpe · H2O

Two new mixed-ligands CdII complexes of trans-1,2-bis(4-pyridyl)ethene (bpe) with 1,3-di(4-pyridyl)propane (bpp) and 1,10-phenanthroline (phen), [Cd(phen)2(bpe)(H2O)](ClO4)2 · H2O (1) and [Cd(bpp)2(H2O)2](ClO4)2 · bpe · H2O (2) have been synthesized and characterized by elemental analysis, IR-,1H NMR- and 13C NMR spectroscopy and studied by thermal as well as X-ray crystallography.