Rare monomeric–dimeric copper(II) cinnamate complexes in one single crystal: Syntheses, characterization, structure determination and DFT studies of two copper(II) complexes

Rare monomeric as well as dimeric Cu(II) complexes, [Cu 2(β- pic) 4L 4][Cu(β-pic) 2L 2(H 2O) 2]·2H 2O (1), (where L = cinnamate and β-pic = β-picoline) in one single crystal have been synthesized by the reaction of copper(II) cinnamate and excess of β-pic while a monomeric complex [Cu(py) 2L 2(H 2O)]·py (2) was obtained in a similar reaction by using py (py = pyridine) instead of β-pic. Both of these copper(II) complexes have been characterized by spectroscopic techniques, TGA, X-ray crystallography and DFT studies.