A5022959815- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Crystallography and molecular interactions
- Metalloenzymes and iron-sulfur proteins
- Organometallic Complex Synthesis and Catalysis
- Magnetism in coordination complexes
- Metal-Catalyzed Oxygenation Mechanisms
- Hydrogen Storage and Materials
- Inorganic Chemistry and Materials
- Electrocatalysts for Energy Conversion
- Metal-Organic Frameworks: Synthesis and Applications
- Visual Culture and Art Theory
- Asymmetric Hydrogenation and Catalysis
- Synthesis and characterization of novel inorganic/organometallic compounds
- Religious Tourism and Spaces
- Cyclopropane Reaction Mechanisms
- Hybrid Renewable Energy Systems
- Synthesis and Catalytic Reactions
- Chemical Reactions and Isotopes
- Chemical Reactions and Mechanisms
- Catalytic Alkyne Reactions
- Catalytic C–H Functionalization Methods
- Cultural Heritage Management and Preservation
University of Victoria
2024
University of Pennsylvania
2015-2021
Providence College
2021
California University of Pennsylvania
2016
Philadelphia University
2016
University of Illinois Urbana-Champaign
2011-2014
Indiana University Bloomington
2014
This report compares biomimetic hydrogen evolution reaction catalysts with and without the amine cofactor (adt(NH)): Fe(2)(adt(NH))(CO)(2)(dppv)(2) (1(NH)) Fe(2)(pdt)(CO)(2)(dppv)(2) (2) [(adt(NH))(2-) = HN(CH(2)S)(2)(2-), pdt(2-) 1,3-(CH(2))(3)S(2)(2-), dppv cis-C(2)H(2)(PPh(2))(2)]. These compounds are spectroscopically, structurally, stereodynamically very similar but exhibit different catalytic properties. Protonation of 1(NH) 2 gives three isomeric hydrides each, beginning kinetically...
Described are new derivatives of the type [HNiFe(SR)2(diphosphine)(CO)3]+, which feature a Ni(diphosphine) group linked to Fe(CO)3 by two bridging thiolate ligands. Previous work had described [HNiFe(pdt)(dppe)(CO)3]+ ([1H]+) and its activity as catalyst for reduction protons (J. Am. Chem. Soc.2010, 132, 14877). Work in this paper focuses on effects properties NiFe model complexes diphosphine attached nickel well dithiolate bridge, 1,3-propanedithiolate (pdt) vs 1,2-ethanedithiolate (edt). A...
A family of Co(II) complexes supported by the bulky, dianionic bis(pyrrolyl)pyridine pincer ligand pyrr2py [pyrr2py2– = 3,5-tBu2-bis(pyrrolyl)pyridine] are reported in this work. These compounds include 1-OEt2, 1·toluene, and 1-N3Ad (Ad 1-adamantyl), latter which is prepared via addition N3Ad to 1-OEt2 [1 (pyrr2py)Co]. While four-coordinate systems having a ion confined cis-divacant octahedral geometry, complex 1·toluene possesses T-shaped environment where toluene interstitial intercalated...
Reactivity studies of a rare example molecular titanium nitride are presented. A combination theory and NMR spectroscopy provide description the bonding in these nitrides, role counter cation, K<sup>+</sup>, as well origin their highly downfield <sup>15</sup>N spectroscopic shifts.
Reported are complexes of the formula Fe(dithiolate)(CO)2(diphos) and their use to prepare homo- heterobimetallic dithiolato derivatives. The starting iron dithiolates were prepared by a one-pot reaction FeCl2 CO with chelating diphosphines dithiolates, where dithiolate = S2(CH2)22– (edt2–), S2(CH2)32– (pdt2–), S2(CH2)2(C(CH3)2)2– (Me2pdt2–) diphos cis-C2H2(PPh2)2 (dppv), C2H4(PPh2)2 (dppe), C6H4(PPh2)2 (dppbz), C2H4[P(C6H11)2]2 (dcpe). incorporation 57Fe into such building block commenced...
The Ti(III) azido complex (PN)2Ti(N3) (PN(-) = (N-(2-(diisopropylphosphino)-4-methylphenyl)-2,4,6-trimethylanilide), can be reduced with KC8 to afford the nitride salt [μ2-K(OEt2)]2[(PN)2Ti≡N]2 in excellent yield. While treatment of dimer 18-crown-6 yields a mononuclear nitride, complete encapsulation alkali metal cryptand provides terminally bound as discrete [K(2,2,2-Kryptofix)][(PN)2Ti≡N]. All complexes reported here have been structurally confirmed and also spectroscopically, Ti-Nnitride...
The trinuclear argentate complex Ag3(μ2-3,5-(CF3)2PyrPy)3 (PyrPy = 2,2′-pyridylpyrrolide) catalyzes the 3 + 2 cycloaddition of several NCR (R Me, Ph, tBu) and N2CHCO2Et to disubstituted oxazoles, even in presence light air. Structural theoretical studies imply a three-coordinate silver carbene complex, (3,5-(CF3)2PyrPy)Ag(CHCO2Et), be responsible stepwise nitrile addition cyclization step form heterocycle.
The nitride salt [(PN)2Ti≡N{μ2-K(OEt2)}]2 (1) (PN– = (N-(2-PiPr2-4-methylphenyl)-2,4,6-Me3C6H2) can be oxidized with two equiv of I2 or four ClCPh3 to produce the phosphinimide-halide complexes (NPN')(PN)Ti(X) (X– I (2), Cl (3); NPN' N-(2-NPiPr2-4-methylphenyl)-2,4,6-Me3C6H22–), respectively. In case 2, H2 was found one other products; whereas, HCPh3 and Gomberg's dimer were observed upon formation 3. Independent studies suggest that oxidation 1 could imply transient nitridyl species...
The reaction of [(MeC(5)H(4))(2)Ti(SH)(2)] with cyclic imines the formula (CH(2)NR)(3) gives 2-aza-1,3-dithiolato chelate complexes [(MeC(5)H(4))(2)Ti{(SCH(2))(2)NR}] (1, R = Ph; 2, Me; 3, CH(2)Ph). These compounds demonstrate that azadithiolate ligands can exist on mononuclear metal centers. were characterized by (1)H NMR spectroscopy, ESI-mass spectrometry, and X-ray crystallography. Variable-temperature studies reveal dithiolate undergo ring inversion like other dithiatitanacyclohexanes....
From 1896, when the first Kinetoscope was brought to Japan, early 1920s, all film screenings were accompanied by a live Japanese narrator called benshi.Benshi stood left of screen and—speaking in melodious rhythms—provided narration, character impersonation, explanation western exotica, and offered general commentary critique for then silent films. In late ninteenth-century not seen as an autonomous medium but rather "commingled” media, comprised vocal storytelling projected motion pictures....