Influencing prototropy by metal ion coordination: supramolecular transformation of a dynamer into a Zn-based toroidal species

Čonková, Miroslava; Drożdż, Wojciech; Miłosz, Zygmunt; Cecot, Piotr; Harrowfield, Jack; Lewandowski, Mikołaj; Stefankiewicz, Artur R.

doi:10.1039/d0tc05598k

Cited by 4 publications

(2 citation statements)

References 26 publications

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“… 2 Both pyridine and polypyridine ligands are good neutral donors of mono- or multidentate nature, and their coordination properties can be relatively easily altered by substitution with electron-donating or -withdrawing groups. 3 The structural and electronic modifications achieved by the functionalization of heterocyclic rings enable modulation of the metal coordination sphere, which can lead to improvement of the desired properties and potential applicability. 4 Furthermore, pyridine and its derivatives can be utilized as model units for research on important biomolecules such as nicotine, pyridoxine, or nicotinamide adenine dinucleotide phosphate (NADP).…”

Section: Introductionmentioning

confidence: 99%

Pd(II) Complexes with Pyridine Ligands: Substituent Effects on the NMR Data, Crystal Structures, and Catalytic Activity

et al. 2022

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A wide range of functionalized pyridine ligands have been employed to synthesize a variety of Pd(II) complexes of the general formulas [Pd L 4 ](NO 3 ) 2 and [Pd L 2 Y 2 ], where L = 4-X-py and Y = Cl – or NO 3 – . Their structures have been unambiguously established via analytical and spectroscopic methods in solution (NMR spectroscopy and mass spectrometry) as well as in the solid state (X-ray diffraction). This in-depth characterization has shown that the functionalization of ligand molecules with groups of either electron-withdrawing or -donating nature (EWG and EDG) results in significant changes in the physicochemical properties of the desired coordination compounds. Downfield shifts of signals in the 1 H NMR spectra were observed upon coordination within and across the complex families, clearly indicating the relationship between NMR chemical shifts and the ligand basicity as estimated from p K a values. A detailed crystallographic study has revealed the operation of a variety of weak interactions, which may be factors explaining aspects of the solution chemistry of the complexes. The Pd(II) complexes have been found to be efficient and versatile precatalysts in Suzuki–Miyaura and Heck cross-coupling reactions within a scope of structurally distinct substrates, and factors have been identified that have contributed to efficiency improvement in both processes.

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Section: Introductionmentioning

confidence: 99%

Pd(II) Complexes with Pyridine Ligands: Substituent Effects on the NMR Data, Crystal Structures, and Catalytic Activity

et al. 2022

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“…Among the various types of supramolecular linkages employed in the generation of complex assemblies, coordination and hydrogen bonds are the most widely employed [ 16 , 17 , 18 , 19 , 20 , 21 ]. It is worth noting that despite the incredible progress made in this area of chemistry in recent years, the simultaneous application of both these bonds for the generation of topologically non-trivial supramolecular architectures remains challenging, especially with the use of highly labile metal ions, such as Ag(I) [ 22 , 23 , 24 , 25 , 26 ].…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Bonding Directed Self-Assembly of a Binuclear Ag(I) Metallacycle into a 1D Supramolecular Polymer

et al. 2021

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An Ag(I) metallacycle obtained unexpectedly during the preparation of Pd(II) complexes of the bifunctional ligand 5-([2,2’-bipyridin]-5-yl)pyrimidine-2-amine (L) has been characterized using X-ray structure determination as a binuclear, metallacyclic species [Ag2L2](SbF6)2, where both the bipyridine and pyrimidine-N donors of L are involved in coordination to the metal. The full coordination environment of the Ag(I) defines a case of highly irregular 4-coordination. In the crystal, the Ag-metallacycles assemble into one-dimensional supramolecular metalladynamers linked together by hydrogen-bonding interactions.

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Bifunctional ligands in uranyl chemistry: Metalloligands and zwitterions

Thuéry,

Harrowfield

2024

Coordination Chemistry Reviews

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Influencing prototropy by metal ion coordination: supramolecular transformation of a dynamer into a Zn-based toroidal species

Abstract: The work provides a previously unknown example of the desymmetrisation of an organic component resulting from the metal-ion induced tautomerisation which led to the generation of a new type of toroidal coordination species at a solid–liquid interface.

Cited by 4 publications

References 26 publications

Pd(II) Complexes with Pyridine Ligands: Substituent Effects on the NMR Data, Crystal Structures, and Catalytic Activity

Pd(II) Complexes with Pyridine Ligands: Substituent Effects on the NMR Data, Crystal Structures, and Catalytic Activity

Hydrogen Bonding Directed Self-Assembly of a Binuclear Ag(I) Metallacycle into a 1D Supramolecular Polymer

Bifunctional ligands in uranyl chemistry: Metalloligands and zwitterions

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