Synthesis and characterization of divalent metal complexes with bipyridylamide ligands

The X-ray structure of [Zn(4-ppa) 2 Cl 2 ] ( 1 ) shows a mononuclear structure with interesting intermolecular hydrogen bonding interactions. [Zn(4-pna)(OAc) 2 ] n ( 2 ), Cu(4-pna)(OTf) 2 (DMF) 2 ] n ( 3 ), {[Zn(4-pina)(DMF) 4 ](OTf) 2 } n ( 4 ), {[Fe(4-pina)(DMF) 4 ](OTf) 2 } n ( 5 ), and [Cu(2-pina)(OTf) 2 (DMF) 2 ] n ( 6 ) are one-dimensional coordination polymers with conformational differences caused by the coordination donor disposition, which demonstrates the flexibility of the pyridylamide ligands in polymeric structures.

Reflectance UV-visible spectra and thermal properties of the coordination polymers are also reported.