Publication

Orientational Self-Sorting in Octahedral Coordination Cages Based on Small, Heteroditopic N-Donor Ligands

2026

Abstract

Coordination cages based on heteroditopic N-donor ligands can potentially form isomers, which differ in the relative orientation of the ligands. We have explored the construction of octahedral cages using small low-symmetry N-donor ligands (L). When the ligands were combined with Pd(CH3CN)42, hexanuclear Pd6L12-type cages were obtained as a mixture of isomers, as evidenced by NMR spectroscopy and single-crystal X-ray crystallography. Attempts to resolve the isomers by cyclic ion mobility-mass spectrometry (cIM-MS) are described. Structurally defined cages of the general formula Pt2Pd4Cl8L84 were formed in kinetically controlled reactions of homoleptic PtL42 complexes with PdCl2(CH3CN)2. Crystallographic analyses of the products have revealed antipodal Pt2+ centers, the pyridine or pyrimidine donor groups of the bridging ligands being exclusively bound to the four equatorial PdCl2 complexes.

Official source

https://infoscience.epfl.ch/entities/publication/d0550ff5-a9a8-4dbf-8283-b639327ad6a6

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2026

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/d0550ff5-a9a8-4dbf-8283-b639327ad6a6

About this result

Related concepts (32)

Coordination complex

A coordination complex is a chemical compound consisting of a central atom or ion, which is usually metallic and is called the coordination centre, and a surrounding array of bound molecules or ions, that are in turn known as ligands or complexing agents. Many metal-containing compounds, especially those that include transition metals (elements like titanium that belong to the periodic table's d-block), are coordination complexes. Coordination complexes are so pervasive that their structures and reactions are described in many ways, sometimes confusingly.

Ligand

In coordination chemistry, a ligand is an ion or molecule with a functional group that binds to a central metal atom to form a coordination complex. The bonding with the metal generally involves formal donation of one or more of the ligand's electron pairs, often through Lewis bases. The nature of metal–ligand bonding can range from covalent to ionic. Furthermore, the metal–ligand bond order can range from one to three. Ligands are viewed as Lewis bases, although rare cases are known to involve Lewis acidic "ligands".

Bridging ligand

In coordination chemistry, a bridging ligand is a ligand that connects two or more atoms, usually metal ions. The ligand may be atomic or polyatomic. Virtually all complex organic compounds can serve as bridging ligands, so the term is usually restricted to small ligands such as pseudohalides or to ligands that are specifically designed to link two metals. In naming a complex wherein a single atom bridges two metals, the bridging ligand is preceded by the Greek letter mu, μ, with a subscript number denoting the number of metals bound to the bridging ligand.

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Orientational Self-Sorting in Octahedral Coordination Cages Based on Small, Heteroditopic N-Donor Ligands

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