Hypervalent (three-center, four-electron) bonding in organobismuth complexes has been extensively studied due to its ability to affect molecular geometry, dynamic behavior, or to stabilize the ligand scaffold. This work addresses the effects of this bonding on reactivity, catalytic activity, redox processes, and its potential applications in biosciences, materials science, and small molecule activation.
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Characterization of Iminobismuthanes and Catalytic Reduction of Organic Azides via Bi(I)/Bi(III) Redox Cycling.
Angew Chem Int Ed Engl
October 2024
Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz1, 45470, Mülheim an der Ruhr, Germany.
Article Synopsis
- Researchers studied organobismuth(I) complexes and their reactions with various organic azides, leading to the creation of iminobismuthanes that have been structurally characterized.
- The iminobismuthanes exhibit potential in catalyzing the reduction of diverse organic azides, showcasing their practical applications.
- Computational DFT calculations provided insights into the reaction mechanisms, reinforcing the notion of a redox process being involved in the catalysis.
Susceptibility of Leishmania to novel pentavalent organometallics: Investigating impact on DNA and membrane integrity in antimony(III)-sensitive and -resistant strains.
Drug Dev Res
May 2024
Department of Chemistry, Institute of Exact Sciences, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil.
The aim the present study was to investigate the impact of novel pentavalent organobismuth and organoantimony complexes on membrane integrity and their interaction with DNA, activity against Sb(III)-sensitive and -resistant Leishmania strains and toxicity in mammalian peritoneal macrophages. PhM(L) type complexes were synthesized, where M = Sb(V) or Bi(V) and L = deprotonated 3-(dimethylamino)benzoic acid or 2-acetylbenzoic acid. Both organobismuth(V) and organoantimony(V) complexes exhibited efficacy at micromolar concentrations against Leishmania amazonensis and L.
View Article and Find Full Text PDFEffect of La on the Formation of Endohedral Zintl Clusters Featuring In/Bi Shells.
Inorg Chem
May 2024
Karlsruhe Institute of Technology, Institute of Nanotechnology, P.O. Box 3640, 76021 Karlsruhe, Germany.
Investigating the interactions of f-block metal ions with p-block polyanions in multinary cluster compounds is becoming increasingly attractive but remains a challenge in terms of both the synthetic approach and the control of the structures that are formed during the syntheses. So far, two types of reactions were dominant for the formation of corresponding clusters: the reaction of binary anions of p-block elements in 1,2-diamino-ethane () solutions or the reaction of organobismuth compounds with corresponding f-block metal complexes in THF. Herein, we report the synthesis of [La@InBi] () and its doubly μ-Bi-bridged analogue in the doubly [K(crypt-222)]-coordinated {[K(crypt-222)][La@InBi](μ-Bi)[La@InBi]} () as their [K(crypt-222)] salts [K(crypt-222)] and [K(crypt-222)], respectively, achieved by reactions of [InMes] and [La(CMeH)] (Mes = mesityl, CMeH = tetramethylcyclopentadienyl) with KGaBi/crypt-222 (crypt-222 = 4,7,13,16,21,24-hexaoxa-1,10-diazabicyclo[8.
View Article and Find Full Text PDFHypervalent organobismuth complexes: pathways toward improved reactivity, catalysis, and applications.
Dalton Trans
September 2023
Department of Chemistry, University of Hawai'i at Mānoa, 2545 McCarthy Mall, Honolulu, Hawaii 96822, USA.
Hypervalent (three-center, four-electron) bonding in organobismuth complexes has been extensively studied due to its ability to affect molecular geometry, dynamic behavior, or to stabilize the ligand scaffold. This work addresses the effects of this bonding on reactivity, catalytic activity, redox processes, and its potential applications in biosciences, materials science, and small molecule activation.
View Article and Find Full Text PDFOxidative Addition of Aryl Electrophiles into a Red-Light-Active Bismuthinidene.
J Am Chem Soc
August 2023
Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, Mülheim an der Ruhr 45470, Germany.
The oxidative addition of aryl electrophiles is a fundamental organometallic reaction widely applied in the field of transition metal chemistry and catalysis. However, the analogous version based on main group elements still remains largely underexplored. Here, we report the ability of a well-defined organobismuth(I) complex to undergo formal oxidative addition with a wide range of aryl electrophiles.
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