A5101968836- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Organometallic Complex Synthesis and Catalysis
- Inorganic Chemistry and Materials
- Synthesis and characterization of novel inorganic/organometallic compounds
- Synthetic Organic Chemistry Methods
- Crystallography and molecular interactions
- Organoboron and organosilicon chemistry
- Asymmetric Hydrogenation and Catalysis
- Magnetism in coordination complexes
- Electrochemical Analysis and Applications
- Metal complexes synthesis and properties
- N-Heterocyclic Carbenes in Organic and Inorganic Chemistry
- Catalytic Alkyne Reactions
- Coordination Chemistry and Organometallics
- MXene and MAX Phase Materials
- Inorganic and Organometallic Chemistry
- Molecular Junctions and Nanostructures
- Ammonia Synthesis and Nitrogen Reduction
- Oxidative Organic Chemistry Reactions
- Chemical Synthesis and Analysis
- Crystal Structures and Properties
- Vanadium and Halogenation Chemistry
University of Pennsylvania
2022-2024
California University of Pennsylvania
2024
Macalester College
2018-2019
Examples of stable 3d transition metal methylidene complexes are extremely rare. Here we report an isolable and vanadium complex, [(PNP)V(=NAr)(=CH2)] (PNP = N[2-PiPr2-4-methylphenyl]−, Ar 2,6-iPr2C6H3), via H atom transfer (HAT) from [(PNP)V(NHAr)(CH3)] or [(PNP)V(=NAr)(CH3)] using two one equivalents the TEMPO radical (TEMPO (2,2,6,6-tetramethylpiperidin-1-yl)oxyl), respectively. Alternatively, moiety can also be formed treatment transient [(PNP)V=NAr] with Wittig reagent, H2CPPh3....
Decarbonylation along with P-atom transfer from the phosphaethynolate anion, PCO- , to NbIV complex [(PNP)NbCl2 (Nt BuAr)] (1) (PNP=N[2-Pi Pr2 -4-methylphenyl]2- ; Ar=3,5-Me2 C6 H3 ) results in its coupling one of phosphine arms pincer ligand produce a phosphanylidene phosphorane [(PNPP)NbCl(Nt (2). Reduction 2 CoCp*2 cleaves P-P bond form first neutral and terminal phosphido group 5 transition metal, namely, [(PNP)Nb≡P(Nt (3). Theoretical studies have been used understand both reductive...
Abstract The nitrido‐ate complex [(PN) 2 Ti(N){μ ‐K(OEt )}] ( 1 ) (PN − =(N‐(2‐P i Pr ‐4‐methylphenyl)‐2,4,6‐Me 3 C 6 H reductively couples CO and isocyanides in the presence of DME or cryptand (Kryptofix222), to form rare, five‐coordinate Ti II complexes having a linear cumulene motif, [K(L)][(PN) Ti(NCE)] (E=O, L=Kryptofix222, ); E=NAd, L=3 DME, E=N t Bu, 4 5 )). Oxidation – with [Fc][OTf] afforded an isostructural III center containing neutral cumulene, E=NAd 7 ), N Bu 8 ))...
Preserving vanadium in a high oxidation state during chemical transformations can be challenging due to the oxidizing nature of V(+5) species. Oxo and similar isoelectronic ligands have been utilized stabilize by extensive π-donation. However, decreasing bond order between V oxo ligand often results reduction metal center. Herein, we report unique transformation involving anionic alkylidene that converts complex alkylidyne three steps without altering This method has used obtain rare 3d...
New tris(phosphinomethyl)phenylborate ligands were synthesized to examine tuning of PhBP<sup>Ph</sup><sub>3</sub> donation <italic>via</italic> inductive modulation the borate charge. Cyclic voltammetry suggests that rational this type occurs in complexes zerovalent metals.
We show in this work how lithium tellurolate Li(X) n TeCH 2 SiMe 3 (X = THF, 1, 1; X 12- crown -4, 2, 2), can serve as an effective Te-atom transfer reagent to all group 5 transition metal halide precursors irrespective of their oxidation state.
Abstract The nitrido‐ate complex [(PN) 2 Ti(N){μ ‐K(OEt )}] ( 1 ) (PN − =(N‐(2‐P i Pr ‐4‐methylphenyl)‐2,4,6‐Me 3 C 6 H reductively couples CO and isocyanides in the presence of DME or cryptand (Kryptofix222), to form rare, five‐coordinate Ti II complexes having a linear cumulene motif, [K(L)][(PN) Ti(NCE)] (E=O, L=Kryptofix222, ); E=NAd, L=3 DME, E=N t Bu, 4 5 )). Oxidation – with [Fc][OTf] afforded an isostructural III center containing neutral cumulene, E=NAd 7 ), N Bu 8 ))...
The complex [(BDI)VCl(N{SiMe3}2)] (1) (BDI– = [ArNC(CH3)]2CH, Ar 2,6-iPr2C6H3), a precursor readily prepared from metathesis of [(BDI)VCl2] and Na[N{SiMe3}2], can be reduced with Na/NaCl in the presence white P4 to form dinuclear species containing two VIII centers bridged by tricyclic [P6]2– scaffold, namely, [(BDI)V(N{SiMe3}2)]2(μ-η1:η1-P6) (2). Coordination involves unique chairlike μ-η1:η1 binding mode contiguous hexaphosphorus unit bridging across V centers. Complexes 1 2 have been...
Tris(diphenylphosphinomethyl)phenylborates permit isolation of remarkably thermally stable chromium(<sc>i</sc>)tricarbonyltris(phosphine) complexes, the first crystallographically characterized [Cr(CO)<sub>3</sub>P<sub>3</sub>]<sup>+</sup> radicals.