Self‐Assembly of a Ferromagnetically Coupled Manganese(II) Tetramer

Self-Assembly of a Three-Dimensional [Ga6(L2)6] Metal-Ligand “Cylinder”

“…[5±7] The faster quenching in polar solvents is attributed to a stabilization of the primary reaction intermediates resulting from CT. [8] When free ions are formed, this stabilization derives from the reduced Coulombic attraction between ions in polar solvents which decreases with the inverse of the dielectric constant (e) according to the Born formula.…”

“…A rational design for the synthesis of high-symmetry, metal ± ligand clusters has been reported; [14] one example is a (HNEt 3 ) 8 [Ti 4 (L 1 ) 4 ] tetrahedral cluster comprising a threefold symmetric, tris-bidentate catecholamide ligand. [6] In an attempt to generalize this methodology for assembling [M 4 L 4 ] tetrahedra, we prepared H 3 L 2 (Scheme 1), a rigid, threefold symmetric, tris-bidentate, pyrazolone-based ligand.…”

Into the Next Dimension: Nanometer-Sized, Oligonuclear Coordination Compounds with C3-Symmetric Ligands

“…A similar complex is obtained upon use of a planar C 3 -symmetric trisplatinum(ii) complex and bent bispyridine derivatives. [16] Use of the building block 10, with a 1208 angle (sp 2 ), instead of 9, with a 908 angle, leads upon reaction with 8 to the preferred formation of the cubeoctahedron [(8) 8 (10) 12 ] 24 (D) in contrast to the tetrahedral [(8) 4 (9) 6 ] 12 (B). This shows that slight variations in the geometry of the supramolecular building blocks can have a big influence on the structures of the self-assembled polynuclear metal complexes.…”

“…tetrahedron, hexahedron, octahedron). [2] Ligand 2 with manganese(ii) ions [9] as well as the deprotonated ligand 3-H 6 with titanium(iv) ions [10] form tetrahedral tetranuclear complexes [ (2) coordination geometry occurs through bidentate ligand units, resulting in a structure of type A.…”

Aufbruch in die nächste Dimension: nanometergroße, mehrkernige Koordinationsverbindungen mitC3-symmetrischen Liganden

“…B. Tetraeder, Hexaeder/trigonale Bipyramide, Oktaeder). [2] Sowohl der Ligand 2 und Mangan(ii)-Ionen [9] als auch der sechsfach deprotonierte Ligand 3-H 6 und Titan(iv)-Ionen [10] bilden jeweils tetraedrische vierkernige Metallkomplexe, [ (2) [14] Die bisher beschriebenen nanometerdimensionierten Kä-figmoleküle konnten durch Röntgenstrukturanalysen eindeutig charakterisiert werden. Im folgenden sollen zwei Koordinationsverbindungen diskutiert werden, die beide den Liganden 8 als organischen Baustein enthalten.…”