Hoffmann, Alexander; Bienemann, Olga; Vieira, Ines dos Santos; Herres-Pawlis, Sonja
New Guanidine-Pyridine Copper Complexes and Their Application in ATRP.
In: Polymers, Vol. 6, Nr. 4: S. 995-1007
The guanidine hybrid ligands, (tetramethylguanidine)methylenepyridine (TMGpy) and (dimethylethyleneguanidine)methylenepyridine (DMEGpy), were proven to be able to stabilize copper complexes active in the solvent-free polymerization of styrene at 110 degrees C using 1-phenylethylbromide as the initiator. The polymerization proceeded after first-order kinetics, and polystyrenes with polydispersities around 1.2 could be obtained. Using the ligand, DMEGpy, three new copper guanidine-pyridine complexes could be synthesized and structurally characterized. Their structural characteristics are discussed.