Molecular-programmed self-assembly of homo- and heterometallic tetranuclear coordination compounds: synthesis, crystal structures, and magnetic properties of rack-type Cu(II)(2)M(II)(2) complexes (M = Cu and Ni) with tetranucleating phenylenedioxama

Molecular-programmed self-assembly of homo- and heterometallic tetranuclear coordination compounds: synthesis, crystal structures, and magnetic properties of rack-type Cu(II)(2)M(II)(2) complexes (M = Cu and Ni) with tetranucleating phenylenedioxama