Copper(I) and copper(II) complexes with pyrazine-containing pyridylalkylamide ligands N-(pyridin-2-ylmethyl)pyrazine-2-carboxamide and N-(2-(pyridin-2-yl)ethyl)pyrazine-2-carboxamide

Four copper(II) complexes and one copper(I) complex with pyridine-containing pyridylalkylamide ligands N-(pyridin-2-ylmethyl)pyrazine-2-carboxamide (HLpz) and N-(2-(pyridin-2-yl)ethyl)pyrazine-2-carboxamide (HLpz') were synthesized and characterized. The X-ray crystal structures of [Cu-2(L-pz)(2)(4,4'-bipy)(OTf)(2)] (1, OTf=trifluoromethanesulfonate, 4,4'-bipy=4,4'-bipyridine) and [Cu(L-pz)(py)(2)]OTfH2O (2, py=pyridine) revealed binuclear and mononuclear molecular species, respectively, while [Cu(L-pz)((2)-1,1-N-3)](n) (3), [Cu(L-pz')((2)-1,3-N-3)](n) (4), and [Cu(HLpz)Cl](n) (5) are coordination polymer 1-D chains in the solid state.