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Titanium(IV) citrate speciation and structure under environmentally and biologically relevant conditions.
The water-soluble complexes of Ti(IV) with citrate are of interest in environmental, biological, and materials chemistry. The aqueous solution speciation is revealed by spectropotentiometricExpand
Highly active and robust Cp* iridium complexes for catalytic water oxidation.
A series of Cp*Ir catalysts are the most active known by over an order of magnitude for water oxidation with Ce(IV). DFT calculations support a Cp*Ir=O complex as an active species.
Molecular Recognition in the Selective Oxygenation of Saturated C-H Bonds by a Dimanganese Catalyst
Control experiments supported the role of hydrogen bonding in orienting the substrate to achieve high selectivity and combined molecular recognition through hydrogen bonding with C-H activation to obtain high-turnover catalytic regioselective functionalization of sp3 C- H bonds remote from the –COOH recognition group. Expand
Hydrolytic metal with a hydrophobic periphery: titanium(IV) complexes of naphthalene-2,3-diolate and interactions with serum albumin.
Insight is provided into the use of ligands to direct metal binding at different sites of albumin, which may facilitate transport to distinct targets, as indicated by competition studies with different ligands and a hydrophilic Ti(IV) complex. Expand
Synthesis and Molecular Structures of Perfluoro-n-alkyl Complexes of Platinum(II) and Platinum(IV) Containing Tetramethylethylenediamine (TMEDA) or 1,2-Bis(diphenylphosphino)ethane (DPPE) Ligands
Reaction of (TMEDA)Pt(CH3)2 with n-perfluoropropyl iodide in hexanes results in an apparent cis addition of the perfluoroalkyl iodide to give the six-coordinate Pt(IV) complexExpand
Half-sandwich iridium complexes for homogeneous water-oxidation catalysis.
DFT calculations and kinetic experiments suggest a mechanism for homogeneous iridium-catalyzed water oxidation and contribute to the determination of the rate-determining step. Expand
Copper complexes of anionic nitrogen ligands in the amidation and imidation of aryl halides.
Data and computed reaction barriers argue against mechanisms in which the haloarene reacts with a two-coordinate anionic copper species and mechanisms that start with electron transfer to generate a free iodoarene radical anion, which are more consistent with mechanisms involving cleavage of the carbon-halogen bond within the coordination sphere of the metal. Expand
Rhodium boryl complexes in the catalytic, terminal functionalization of alkanes.
Results strongly suggest that the C-H bond cleavage process occurs by a metal-assisted sigma-bond metathesis mechanism to generate a borane complex that isomerizes if necessary to place the alkyl group cis to the boryl group. Expand
Iridium and Ruthenium Complexes with Chelating N-Heterocyclic Carbenes: Efficient Catalysts for Transfer Hydrogenation, β-Alkylation of Alcohols, and N-Alkylation of Amines
Air-stable Ir and Ru complexes of a chelating pyrimidine-functionalized N-heterocyclic carbene were synthesized. The complexes were characterized by NMR spectroscopy and single-crystal X-rayExpand
Hypervalent iodine-mediated vicinal syn diazidation: application to the total synthesis of (+/-)-dibromophakellstatin.
The total synthesis of (+/-)-dibromophakellstatin is described, constructed from a key syn-diazide, formed by a hypervalent iodine-mediated diazidation of a dihydrodipyrrolopyrazinone ring structure. Expand