1D Copper(II)-Aroylhydrazone Coordination Polymers: Magnetic Properties and Microwave Assisted Oxidation of a Secondary Alcohol.

The 1D Cu(II) coordination polymers [Cu(L)(NO)(HO)] () and Cu(HL)(NO)(HO) () have been synthesized using the aroylhyrazone Schiff bases , -bis(pyridin-2-ylmethylene)oxalohydrazide (HL) and , -bis(2-hydroxybenzylidene)malonohydrazide (HL), respectively. They have been characterized by elemental analysis, infrared (IR) spectroscopy, UV-Vis spectroscopy, electrospray ionization mass spectrometry (ESI-MS), single crystal X-ray diffraction and variable temperature magnetic susceptibility measurements (for ). The ligand (L) coordinates in the form in , whereas the coordination is observed for (HL) in . Either the ligand bridge or the nitrate bridge in mediates weak antiferromagnetic coupling. The catalytic performance of and has been investigated toward the solvent-free microwave-assisted oxidation of a secondary alcohol (1-phenylethanol used as model substrate). At 120°C and in the presence of the nitroxyl radical 2,2,6,6-tetramethylpiperydil-1-oxyl (TEMPO), the complete conversion of 1-phenylethanol into acetophenone occurs with TOFs up to 1,200 h.