The first crystal and molecular structure of lanthanide homodinuclear macrocyclic complexes showing metal–metal pair interactions

Stereochemistry of Compounds with Coordination Number Ten

“…[37] The hexadentate ligands adopt the conformation shown in 3 a in practically all cases, the only exception (conformation 3 b) being that of a lanthanum compound. [38] Unbranched hexadentate ligands have been found in BCSAPR [39] and SPC [40] geometries, with the conformations shown in 4 a and 4 b, respectively. Table S4 in the Supporting Information for more details).…”

Lanthanide-Containing Molecular and Supramolecular Polymetallic Functional Assemblies

“…Typical examples are bis-(15-crown-5) derivatives, 168 bis(calixarenes), 169 or bis-(cyclen) derivatives. 120 Trying to bring the two ions closer together led several authors to use large, predisposed, and flexible macrocycles based on Schiff bases or calixarene frameworks (L12-L16), Chart 2, [121][122][123][124][125]170 or on macrotricyclic units. 171,172 An alternative is to sandwich the two ions between two macrocycles, with small ligand molecules (hydroxyl groups, chlorides, dmso molecules) acting as bridging units; examples are complexes with para-substituted …”

Bis(μ-2,6-diformyl-4-methylphenolato)bis[bis(2,6-diformyl-4-methylphenolato)neodymium(III)]

“…Lanthanide(III) dinuclear compounds which feature well isolated Ln 3+ -Ln 3+ pairs are suitable building blocks for the assembly of Ln III nanoclusters (Zheng, 2001) and ideal models for the study of metal-metal interactions in these polynuclear complexes (Thompson et al, 2001). The title compound, (I), was synthesized during attempts to build dinuclear complexes (Kahwa et al, 1989) that could facilitate a comparative study of the synthesis and electronic properties of Ln III nanoclusters.…”