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A metal—organic polyhedron of truncated octahedral geometry augmented with a C4-symmetric square-planar CuII paddle-wheel node as a secondary building unit can be prepared using a C3-symmetric ligand that occupies the face of the octahedral cage, where the three phenyl groups containing a m-carboxylate group in the ligand provide the necessary curvature to form the finite octahedral cage. [ABSTRACT FROM AUTHOR]

Either an S8 symmetrical 48-membered hexadecanuclear or an S10 symmetrical 60-membered icosanuclear manganese metallamacrocycle was self-assembled using a manganese ion and a ditopic pentadentate ligand. This was either N-4-phenylbenzoylsalicylhydrazide (H3pbshz) containing a rigid rod-shaped, bulky biphenyl residue as a terminal N-acyl group or N-3,3-diphenylpropionylsalicylhydrazide (H3dppshz) containing a flexible β-branched N-acyl group, but with two sterically bulky phenyl residues at the Cβ position. The backbone of these metal-organic assemblies is a repeating unit consisting of a -[Mn-N-N-] link that extends to complete either the 48-membered cyclic structure involving 16 manganese(lll)centers and 16 ditopic linker ligands or the 60-membered cyclic structure involving 20 manganese(lll) centers and 20 ditopic linker ligands (depending on the ligand used). Even though the nuclearity of the metallamacrocycles was different, the successive manganese centers were in the same chiral sequence, ··· (ΛΛΛΛ)(ΛΛΛΛ)···. [ABSTRACT FROM AUTHOR]

Discrete metal-organic polyhedra (MOP) with nanosized cavities and/or clusters of MOP could be prepared when C3-symmetric facial ligands and a potential hexatopic Cu(II) ion are combined in the presence of perchlorate as a weak linker, while similar reaction conditions in the presence of a nitrate linker led to extended metal-organic frameworks made of MOP as supramolecular building blocks. [ABSTRACT FROM AUTHOR]