[Au(CF3)(CO)]: A Gold Carbonyl Compound Stabilized by a Trifluoromethyl Group

[Au(CF3)(CO)]: A Gold Carbonyl Compound Stabilized by a Trifluoromethyl Group: "

Fluorination operates for good: A trifluoromethyl group is able to stabilize the title compound (see picture; Au yellow, C gray, F green, O red), which formed by low-temperature treatment of [PPh₄][Au(CF₃)₂] with BF₃⋅OEt₂. A trigonal environment is adopted by each molecule with aurophilic interactions with three near-neighbors in a global triskelion arrangement.

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Dihydrogen Activation by Frustrated Carbene-Borane Lewis Pairs: An Experimental and Theoretical Study of Carbene Variation

Dihydrogen Activation by Frustrated Carbene-Borane Lewis Pairs: An Experimental and Theoretical Study of Carbene Variation: "

Inorganic Chemistry

DOI: 10.1021/ic201290g

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Interfacial Photoreduction of Supercritical CO2 by an Aqueous Catalyst

Interfacial Photoreduction of Supercritical CO2 by an Aqueous Catalyst: "

No just a solvent anymore: CO₂ reduction under supercritical conditions was achieved in a biphasic water–supercritical CO₂ system using an aqueous soluble catalyst (see picture). The introduction of such an interface provides a suitable reaction medium where adsorption, CO₂ binding, and protonation of intermediates are intimately linked.

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A Process for the Synthesis of Formic Acid by CO2 Hydrogenation: Thermodynamic Aspects and the Role of CO

A Process for the Synthesis of Formic Acid by CO2 Hydrogenation: Thermodynamic Aspects and the Role of CO: "

Alcohol and CO: A new process for hydrogenating CO₂ to formic acid has been developed. Calorimetric studies were carried out to clarify the role of the alcohol solvent in the catalytic cycle. CO₂ hydrogenation is only thermodynamically feasible in the presence of hydrogen-bonding solvents. NMR spectroscopy indicates that catalytically active monocarbonyl complexes are formed when highly basic alkyl phosphine complexes are used as catalysts.

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Chemistry: Recipe for a good catalyst

Chemistry: Recipe for a good catalyst: "

Chemistry: Recipe for a good catalyst

Nature 474, 7351 (2011). doi:10.1038/474255d

Faced with the challenge of developing low-cost catalysts for some fuel cells and metal–air batteries, researchers have come up with a basic recipe that ensures high catalytic activity in a family of widely used materials.Perovskite oxides catalyse the oxygen-reduction reaction, a core process in

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Synthesis, structure and DFT study of dinuclear iron, cobalt and nickel complexes with cyclopentadienyl-metal moieties

Synthesis, structure and DFT study of dinuclear iron, cobalt and nickel complexes with cyclopentadienyl-metal moieties: "

Dinuclear half-sandwich complexes were prepared through reaction of 1,1[prime or minute]-bis(diphenylphosphino)metallocene with mononuclear iron, cobalt and nickel complexes supported by trimethylphosphine ligands.

Nazhen Liu, Xiaoyan Li, Xiaofeng Xu, Zhiping Wang, Hongjian Sun

( from Dalton Trans.)

Nazhen Liu, Dalton Trans., 2011, DOI: 10.1039/C0DT01386B

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Synthesis of Mo(CO)2(η3-PPh2(o-C6H4)C(═O)H)2 and its reaction with C60

Synthesis of Mo(CO)2(η3-PPh2(o-C6H4)C(═O)H)2 and its reaction with C60: "Publication year: 2011
Source: Journal of Organometallic Chemistry, In Press, Accepted Manuscript, Available online 25 January 2011
Chi-Shian, Chen , Cha-Shie, Lin , Wen-Yann, Yeh
Reaction of Mo(CO)3(NCMe)3 and PPh2(o-C6H4)C(═O)H (abbreviated as PCHO) at room temperature affords Mo(CO)2(η3-PCHO)2 (1), while compound 1 and the phosphine-imine complex Mo(CO)4(η2-PPh2(o-C6H4)CH═NMe) (2) are obtained by using Mo(CO)3(η3-(MeNCH2)3) as the reactant. Thermal reaction of 1 with C60 products Mo(CO)2(η4-(PPh2(o-C6H4)CH)2)(η2-C60) (3) in low yield, apparently through coupling of the formyl moieties. The structures of 1 and 3 have been determined by an X-ray diffraction study. The two aldehyde groups of 1 and C60 ligand of 3 are coordinated to the molybdenum atom in a π-fashion."

A straightforward synthesis of cationic nitrile ligated transition metal complexes with the [B(C6F5)4]− Anion

A straightforward synthesis of cationic nitrile ligated transition metal complexes with the [B(C6F5)4]− Anion: "Publication year: 2011
Source: Journal of Organometallic Chemistry, In Press, Accepted Manuscript, Available online 13 February 2011
Silvana F., Rach , Eberhardt, Herdtweck , Fritz E., Kühn
Nitrile ligated transition metal complexes bearing polyfluorinated tetra(aryl)borates as counter anions are highly active initiators/mediators for various polymerization reactions. However, the methods for their preparation are still far too inefficient for widespread use in applied research or in industry. Accordingly, an improved synthesis for two of the most promising species in this assemblage of complexes, namely [Cu(C6H5CN)5][B(C6F5)4]2 and [Zn(CH3CN)4/6][B(C6F5)4]2, has been developed. This route provides easy access to pure products on a gram scale, by the reaction of copper(II)acetate and diethyl zinc with [H(OEt2)2][B(C6F5)4]. Additionally, a new route for the synthesis of the oxonium acid as precursor has been developed,..."

The Synthesis of A New Nitrogen Joined N-PEG-TsDPEN Ligand and Its Application in Asymmetric Transfer Hydrogenation of Ketones in Neat Water

The Synthesis of A New Nitrogen Joined N-PEG-TsDPEN Ligand and Its Application in Asymmetric Transfer Hydrogenation of Ketones in Neat Water: "Publication year: 2011
Source: Journal of Organometallic Chemistry, In Press, Accepted Manuscript, Available online 15 February 2011
Wenjun, Shan , Fanchao, Meng , Yinuo, Wu , Fei, Mao , Xingshu, Li
A new polyethylene glycol (PEG) supported ligand, with the PEG chain attached to the nitrogen of TsDPEN, was synthesized using a very simple procedure. The Ru-catalyzed asymmetric transfer hydrogenation of various aromatic ketones in water was investigated with this chiral ligand. High chemical yields and enantioselectivities were obtained under very mild conditions. In addition, the chiral ligand was easily recycled several times and this catalyst was especially suitable for the preparation of chiral tetrahydronaphthalen-1-ol and 2,3-dihydro-1H-inden-1-ol (up to 98% conversion with 99% ee). The latter product can be used as the key intermediate for the synthesis of neuroprotective and anti-AChE..."

Diiron propanedithiolate complex bearing the pyridyl-functionalized phosphine ligand axially coordinated to a photosensitizer zinc tetraphenylporphyrin

Diiron propanedithiolate complex bearing the pyridyl-functionalized phosphine ligand axially coordinated to a photosensitizer zinc tetraphenylporphyrin: "Publication year: 2011
Source: Journal of Organometallic Chemistry, In Press, Accepted Manuscript, Available online 23 May 2011
Xu-Feng, Liu , Xun-Wen, Xiao
Treatment of the starting material (μ-PDT)Fe2(CO)6 (PDT=SCH2CH2CH2S) with 4-diphenylphosphinoaminopyridine (PyNHPPh2) in the presence of the decarbonylating agent Me3NO∙2H2O afforded (μ-PDT)Fe2(CO)5(PyNHPPh2) (1) in 56% yield. Further treatment of 1 with Zinc tetraphenylporphyrin (ZnTPP) yielded the target light-driven model compound (μ-PDT)Fe2(CO)5(PyNHPPh2)(ZnTPP) (2) in 94% yield. The new complexes 1 and 2 were characterized by elemental analysis, NMR, IR, and X-ray crystallography. The molecular structure of 2 revealed its precursor 1 and a photosensitizer ZnTPP joined together through axial coordination. Furthermore, the fluorescence emission spectra and electrochemistry were also investigated."

Electronic Structure of 2,2′-Bipyridine Organotransition-Metal Complexes. Establishing the Ligand Oxidation Level by Density Functional Theoretical Calculations

Electronic Structure of 2,2′-Bipyridine Organotransition-Metal Complexes. Establishing the Ligand Oxidation Level by Density Functional Theoretical Calculations: "

Inorganic Chemistry

DOI: 10.1021/ic2005419

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Acid–Base Interaction between Transition-Metal Hydrides: Dihydrogen Bonding and Dihydrogen Evolution

Acid–Base Interaction between Transition-Metal Hydrides: Dihydrogen Bonding and Dihydrogen Evolution: "

Reaction of the acidic tungsten(II) hydride 2 with the nickel(II) pincer complex 1 in either THF or toluene after an initial dihydrogen bonding (DHB) interaction led to the formation of the Ni–W bimetallic species 3 (see picture). The first example of DHB between two metal hydrides with opposite polarity was analyzed by NMR and IR spectroscopy, X-ray crystallography, and DFT calculations.

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Reactions of Zn bis-ferrocenyl-[small beta]-diketiminates with [Ph3C][B(C6F5)4]

Reactions of Zn bis-ferrocenyl-[small beta]-diketiminates with [Ph3C][B(C6F5)4]: "

ZnMe complexes of bis-ferrocenyl-[small beta]-diketiminate ligands are prepared and reactions with [Ph3C][B(C6F5)4] are explored.

Louisa J. E. Stanlake, Douglas W. Stephan

( from Dalton Trans.)

Louisa J. E. Stanlake, Dalton Trans., 2011, DOI: 10.1039/C1DT10452G

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Determination of Hydride Affinities of Various Aldehydes and Ketones in Acetonitrile

Determination of Hydride Affinities of Various Aldehydes and Ketones in Acetonitrile: "

Organic Letters

DOI: 10.1021/ol2006488

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Trimetallic O2 Reduction Catalyst

Triangular Trinuclear Metal-N4 Complexes with High Electrocatalytic Activity for Oxygen Reduction: "

Journal of the American Chemical Society

DOI: 10.1021/ja203776f

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Benzylic Ligand Hydroxylation Starting from a Dicopper μ-η2:η2 Peroxo Intermediate: Dramatic Acceleration of the Reaction by Hydrogen-Atom Donors

Benzylic Ligand Hydroxylation Starting from a Dicopper μ-η2:η2 Peroxo Intermediate: Dramatic Acceleration of the Reaction by Hydrogen-Atom Donors: "

Radicals in directed pathways: The μ-η²:η² peroxo Cu^II₂ intermediate 1 shows a much faster benzylic ligand hydroxylation than systems without phenol. This novel reactivity can be further accelerated by addition of external H-atom donors such as TEMPO-H. The results imply initial H-atom transfer leading to the formation of phenoxyl radicals. A highly reactive copper oxyl intermediate is then formed, which inserts oxygen into the benzylic CH bond.

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Synthesis, Electronic Structure, and Ethylene Polymerization Activity of Bis(imino)pyridine Cobalt Alkyl Cations

Synthesis, Electronic Structure, and Ethylene Polymerization Activity of Bis(imino)pyridine Cobalt Alkyl Cations: "

A new spin on polymers: The title cations comprise low-spin Co^II centers with neutral bis(imino)pyridine chelating ligands. These complexes serve as single-component ethylene polymerization catalysts (see scheme) and offer insight into the mechanism of chain growth and catalyst deactivation, which occurs by forming inactive cationic bis(imino)pyridine cobalt complexes with a diethyl ether ligand.

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http://www.sciencedirect.com/science/article/pii/S0162013410001297