A5057653828- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Organometallic Complex Synthesis and Catalysis
- Catalytic C–H Functionalization Methods
- Asymmetric Hydrogenation and Catalysis
- Metal-Catalyzed Oxygenation Mechanisms
- Magnetism in coordination complexes
- Metal complexes synthesis and properties
- Catalytic Cross-Coupling Reactions
- Environmental Science and Water Management
- Axial and Atropisomeric Chirality Synthesis
- Balkan and Eastern European Studies
- Lanthanide and Transition Metal Complexes
- Organoboron and organosilicon chemistry
- Radical Photochemical Reactions
- Synthesis and characterization of novel inorganic/organometallic compounds
- Synthesis and Catalytic Reactions
- Oxidative Organic Chemistry Reactions
- Electrocatalysts for Energy Conversion
- Luminescence and Fluorescent Materials
- Radioactive element chemistry and processing
- Metalloenzymes and iron-sulfur proteins
- Catalytic Alkyne Reactions
University of Rochester
2020-2024
Max Planck Institute for Chemical Energy Conversion
2024
Abstract The assembly of chiral molecules with multiple stereogenic elements is challenging, and, despite indisputable advances, largely limited to toxic, cost-intensive and precious metal catalysts. In sharp contrast, we herein disclose a versatile C–H alkylation using non-toxic, low-cost iron catalyst for the synthesis substituted indoles two elements. key achieving excellent diastereo- enantioselectivity was substitution on N -heterocyclic carbene ligand providing steric hindrance extra...
In this work, we aim to formally design iron(0) complexes combined with a phenanthroline-type ligand (phen) and investigate their utility in cycloaddition catalysis. Owing the strong noninnocence of phen scaffold, its ligation reduced iron oxidation states classically affords particularly unstable species. The reported examples such well-defined coordination are thus scarce. We demonstrate herein that strategic steric protection C4 C7 positions ring leads neutral (N,N)2Fe species, which...
As prevalent cofactors in living organisms, iron–sulfur clusters participate not only the electron-transfer processes but also biosynthesis of other cofactors. Many synthetic have been used model studies, aiming to mimic their biological functions and gain mechanistic insight into related systems. The smallest [2Fe–2S] are typically for one-electron because limited capacity. Our group is interested functionalizing small with redox-active ligands enhance electron storage capacity, such...
The association of the ferrous complex Fe
Experimental and computational studies support an inner-sphere radical pathway for iron-catalysed C–H activation/functionalisation with allyl electrophiles.
The first uranium bis(acyl)phosphide (BAP) complexes were synthesized from the reaction between sodium bis(mesitoyl)phosphide (Na(mesBAP)) or bis(2,4,6-triisopropylbenzoyl)phosphide (Na(trippBAP)) and UI3(1,4-dioxane)1.5. Thermally stable, homoleptic BAP characterized by single-crystal X-ray diffraction electron paramagnetic resonance (EPR) spectroscopy, when appropriate, for elucidation of electronic structure bonding these complexes. EPR spectroscopy revealed that ligands on center retain...
Magnetic circular dichroism (MCD) spectroscopy is a powerful experiment used to probe the electronic structure and bonding in paramagnetic metal-based complexes. While C-term MCD has been utilized many areas of chemistry, it underutilized studying organometallic transition metal f-element From analysis isolated complexes study situ generated species, can provide information regarding ligand interactions, oxidation spin state, geometry coordination environment species. The pratical aspects...
Abstract Diarsene [L(MeO)GaAs] 2 (L=HC[C(Me)N(Ar)] , Ar=2,6‐ i Pr C 6 H 3 4 ) reacts with MeOTf and Me NHC ( NHC=1,3,4,5‐tetra‐methylimidazol‐2‐ylidene) to the diarsene [L(TfO)GaAs] 5 carbene‐coordinated [L(MeO)GaAsAs( NHC)Ga(OMe)L] ). The NHC‐coordination results in an inversion of redox properties which shows only a reversible reduction event at E 1/2 =−2.06 V vs Fc 0/+1 whereas oxidation =−1.31 . Single electron transfer reactions yielded [K[2.2.2.]cryp][L(MeO)GaAs] 8 NHC)‐Ga(OMe)L][B(C F...
Iron-catalyzed amino-oxygenation of olefins often uses discrete ligands to increase reactivity and broaden substrate scope. This work is focused on examining ligand effects in situ iron speciation a system which utilizes bisoxazoline ligand. Freeze-trapped 57Fe Mössbauer EPR spectroscopies as well SC-XRD experiments were utilized isolate identify the species formed during catalytic reaction with functionalized hydroxylamines, precatalytic mixture salt Experiments revealed significant...