Citation: Monfared, Hassan Hosseini; Vahedpour, Morteza; Yeganeh, Mahdi Mahdavi; Ghorbanloo, Massomeh; Mayer, Peter; Janiak, Christoph (2011). Concentration dependent tautomerism in green [Cu(HL¹)(L²)] and brown [Cu(L¹)(HL²)] with H₂L¹ = (E)-N'-(2-hydroxy-3-methoxybenzylidene)benzoylhydrazone and HL² = pyridine-4-carboxylic (isonicotinic) acid.. Dalton transactions (Cambridge, England : 2003), 40, pp. 1286-1294.