2,2′-Bipyridines carrying a diazo moiety and their complexes with bis(hexafluoroacetylacetonato)copper: synthesis, structures, electronic and magnetic properties of their photoproducts in frozen solutions
2,2′-Bipyridines carrying a diazo moiety and their complexes with bis(hexafluoroacetylacetonato)copper: synthesis, structures, electronic and magnetic properties of their photoproducts in frozen solutions