Metallomacrocyclic Complexes by Self‐Assembly of Ni
II
and Cu
II
Ions and Chelating Bis(
N
‐acylamidines)
摘要:
AbstractBis(N‐acylamidines) 1, which contain various rigid or flexible spacer units with different spatial orientations, are potent bis(bidentate) ligands for the coordination of metal ions. Treatment of 1 with NiII or CuII salts gave two 2:2 (3) and four 3:3 (4) metallomacrocycles by self‐assembly. The structures of the hitherto unknown products were determined by the geometry of the ligands that incorporate either linear or bent spacers between the two binding sites. Complex 3b is especially interesting due to its two vinyl subunits orientated perpendicular to the plane of the molecule. Complexes 3 and 4 crystallize in planar layers with intercalated solvent molecules (N,N‐dimethylformamide, dimethyl sulfoxide). The molecular structures of five coordination compounds in the solid state have been elucidated by X‐ray diffraction.