A5036650979- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Synthesis and characterization of novel inorganic/organometallic compounds
- Coordination Chemistry and Organometallics
- Advanced Chemical Physics Studies
- Iron-based superconductors research
- Crystallography and molecular interactions
- Organometallic Complex Synthesis and Catalysis
- Inorganic Chemistry and Materials
- Crystal Structures and Properties
- Catalytic Cross-Coupling Reactions
- 2D Materials and Applications
- Asymmetric Hydrogenation and Catalysis
- Fluorine in Organic Chemistry
- Rare-earth and actinide compounds
- Radioactive element chemistry and processing
- Synthetic Organic Chemistry Methods
- Chemical Synthesis and Characterization
Philipps University of Marburg
2014-2021
The encapsulation of actinide ions in intermetalloid clusters has long been proposed but was never realized synthetically. We report the isolation and experimental, as well quantum chemical, characterization uranium-centered [U@Bi12]3–, [U@Tl2Bi11]3–, [U@Pb7Bi7]3–, [U@Pb4Bi9]3–, upon reaction (EE′Bi2)2– (E = Ga, Tl, E′ Bi; E Pb) [U(C5Me4H)3] or [U(C5Me4H)3Cl] 1,2-diaminoethane. For magnetic susceptibility measurements rationalize an unprecedented antiferromagnetic coupling between a U4+ site...
Until now, polycyclic bismuth polyanions have not been known-thus discriminating from its lighter congeners. However, the synthesis of [K([2.2.2]crypt)]3 (Bi11 )⋅2 py⋅tol, allows us to present first structurally characterized homoatomic, polyanion, which exhibits [P11 ](3-) "ufosan" structure. It was obtained upon treatment [K([2.2.2]crypt)]2 (GaBi3 )⋅en with solvent pyridine. The binary Zintl anion [GaBi3 ](2-) decomposes under oxidative coupling pyridine molecules and release H2 form title...
Abstract The access to molecules comprising direct Zn–Zn bonds has become very topical in recent years for various reasons. Low-valent organozinc compounds show remarkable reactivities, and larger Zn–Zn-bonded gas-phase species exhibit a unusual coexistence of insulating metallic properties. However, as Zn atoms do not high tendency form clusters condensed phases, synthetic approaches generating purely inorganic metalloid x units under ambient conditions have been lacking so far. Here we...
Bismuth-rich polyanions show a unique potential in constructing nanostructured bismuth-based materials, but they are still poorly investigated. We use ternary precursor of the nominal composition “K5Ga2Bi4” for formation [K(crypt-222)]+ salts novel Bi-rich [Bi@Ga8(Bi2)6]q− (q = 3, 5; 1), (Ga2Bi16)4– (in 2), and [{Ru(cod)}4Bi18]4– 3). Their bismuth contents exceed that largest homoatomic polyanion, Bi113–. The numbers atoms anions 2 3 furthermore surmount Bi-richest binary main-group anion,...
Abstract Bisher galten polycyclische Bismut‐Polyanionen als unbekannt, wodurch sich Bismut deutlich von seinen leichteren Homologen unterschied. Nach der Synthese [K([2.2.2]crypt)] 3 (Bi 11 )⋅2 py⋅tol können wir nun jedoch das erste strukturell charakterisierte homoatomare, Bismut‐Polyanion vorstellen, welches die vom [P ] 3− bekannte “Ufosan”‐Struktur aufweist. Es entsteht bei Behandlung 2 (GaBi )⋅en mit Pyridin. Bei Bildung Titelverbindung zersetzt binäre Zintl‐Anion [GaBi 2− unter...
The novel ternary phase K2Ge3As3 was prepared by fusion of the elements. It crystallizes in very thin, deeply black fibers exhibiting metallic luster. appearance is accordance with its crystal structure that comprises an unprecedented one-dimensional anionic substructure, ∞1{(Ge3As3)2–}, and it reflects optical absorption properties. Both experimental UV–visible spectrum density-functional theory (DFT)-based band calculations hint toward a narrow-band-gap semiconductor. gap obtained from DFT...
Ein [Bi11 ]3−-“Ufosan”, das erste polycyclische Bismutpolyanion, entsteht bei der Reaktion von [K([2.2.2]crypt)]2(GaBi3) mit dem Lösungsmittel Pyridin, wie S. Dehnen et al. in Zuschrift auf 4792 ff. zeigen. Das binäre Zintl-Anion [GaBi3]2− zersetzt sich Bildung des Produkts [K([2.2.2]crypt)]3(Bi11) unter oxidativer Kupplung Pyridinmolekülen und H2.
Abstract The binary Zintl anion [GaBi 3 ] 2‐ decomposes under oxidative coupling of pyridine and release H 2 to form the polycyclic bismuth polyanion [Bi 11 3‐ , which exhibits [P “ufosan” structure.