Trendbericht Anorganik 2024: Hauptgruppen‐ und Molekülchemie

Nachrichten aus der Chemie, Год журнала: 2024, Номер 72(2), С. 46 - 57

Опубликована: Янв. 31, 2024

Abstract Hauptgruppen‐ und Molekülchemie: Die leichteste Metall‐Metall‐Bindung im Bisberyllocen; ein doppeltes Highlight in der Carbenchemie: C zweifach oxidiert mit formal vier Valenzelektronen Bor‐Flanken für extreme Lewis‐Azidität; außergewöhnliche Liganden ermöglichen, ungewöhnlich reaktive Spezies zu isolieren: kristallines Triplett‐Bismutiniden. Nebengruppen, Bioanorganik Koordinationschemie: Rhodiumnitren, koordiniertes Ytterbium lumineszierendes Chrom sowie quadratisch‐planares Cu 4 S.

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Calcium‐Ligand Cooperation Promoted Activation of N₂O, Amine, and H₂ as well as Catalytic Hydrogenation of Imines, Quinoline, and Alkenes

Angewandte Chemie, Год журнала: 2024, Номер 136(21)

Опубликована: Март 27, 2024

Abstract Bond activation and catalysis using s‐block metals are of great significance. Herein, a series calcium pincer complexes with deprotonated side arms have been prepared pyridine‐based PNP PNN ligands. The were characterized by NMR X‐ray crystal diffraction. Utilizing the obtained complexes, unprecedented N 2 O metal‐ligand cooperation (MLC) involving dearomatization‐aromatization pyridine ligand was achieved, generating aromatized diazotate as products. Additionally, dearomatized able to activate N−H bond well reversibly H , offering an opportunity for catalytic hydrogenation various unsaturated molecules. DFT calculations applied analyze electronic structures synthesized explore possible reaction mechanisms. This study is important complement area MLC main‐group metal chemistry.

Язык: Английский

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Dynamic Coordination Behavior of a Structurally Constrained, Nucleophilic Sn(II) Towards Gold(I)

Zeitschrift für anorganische und allgemeine Chemie, Год журнала: 2024, Номер 650(16)

Опубликована: Июнь 12, 2024

Abstract Tetradentate meso ‐octaalkylcalix[4]pyrroles are well‐established ligands in d ‐ and f ‐block chemistry. In contrast to the related porphyrins, sp 3 ‐hybridized ‐carbon atoms linking four pyrrole units result highly divers coordination modes. We previously reported on combination of this ligand system with Sn(II) centers yielding tetracoordinated stannate(II) anions which could be employed as electron‐rich, strong σ‐donor transition metal With work we extending chemistry ‐octaethylcalix[4]pyrrolato [1] 2− onto gold(I). Synthesis mono‐ dinuclear gold complexes reveal a new dynamic binding mode involving μ 2 ‐bridging nitrogen atom both Sn Au. Single‐crystal X‐ray diffraction variable temperature NMR spectroscopy combined quantum mechanical computations bond analysis tools shed light involved intermediates.

Язык: Английский

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An improvement for enrichment and purification of germanium using carbonyl acid extractants

Separation and Purification Technology, Год журнала: 2024, Номер unknown, С. 129770 - 129770

Опубликована: Сен. 1, 2024

Язык: Английский

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