The Cu(II) complexes [Cu(Tppz)(Dipic)] ⋅ 8H2O (I) and [Pb2(Tppz)Cl4]n (II), where Tppz,

H2Dipic are 2,3,5,6-tetrakis(2-pyridyl)pyrazine, dipicolinic acid, respectively, have been synthesized and

characterized ...