Friday, March 30, 2012

Coordination Chemistry of 4-Methyl-2,6,7-trioxa-1-phosphabicyclo[2,2,1]heptane: Preparation and Characterization of Ru(II) Complexes

Coordination Chemistry
of 4-Methyl-2,6,7-trioxa-1-phosphabicyclo[2,2,1]heptane: Preparation
and Characterization of Ru(II) Complexes
:
TOC Graphic
Inorganic Chemistry
DOI: 10.1021/ic300109b

Selective Electrocatalytic Reduction of CO2 to Formate by Water-Stable Iridium Dihydride Pincer Complexes

Selective Electrocatalytic
Reduction of CO2 to Formate by Water-Stable Iridium Dihydride
Pincer Complexes
:
TOC Graphic
Journal of the American Chemical Society
DOI: 10.1021/ja300543s

Electrocatalytic Oxygen Reduction by Iron Tetra-arylporphyrins Bearing Pendant Proton Relays

Electrocatalytic Oxygen
Reduction by Iron Tetra-arylporphyrins
Bearing Pendant Proton Relays
:
TOC Graphic
Journal of the American Chemical Society
DOI: 10.1021/ja211987f

Characterization of Photochemical Processes for H2 Production by CdS Nanorod–[FeFe] Hydrogenase Complexes

Characterization of Photochemical
Processes for H2 Production by CdS Nanorod–[FeFe]
Hydrogenase Complexes
:
TOC Graphic
Journal of the American Chemical Society
DOI: 10.1021/ja2116348

Iron Complex-Catalyzed Ammonia–Borane Dehydrogenation. A Potential Route toward B–N-Containing Polymer Motifs Using Earth-Abundant Metal Catalysts

Iron Complex-Catalyzed
Ammonia–Borane Dehydrogenation.
A Potential Route toward B–N-Containing Polymer Motifs Using
Earth-Abundant Metal Catalysts
:
TOC Graphic
Journal of the American Chemical Society
DOI: 10.1021/ja210542r

Synthesis and Stereoselective Interconversion of Chiral 1-Aza-3,6-diphosphacycloheptanes

Synthesis and Stereoselective Interconversion of Chiral 1-Aza-3,6-diphosphacycloheptanes:


Thumbnail image of graphical abstract


1-Aza-3,6-diphosphacycloheptanes with chiral substituents on the nitrogen atoms were synthesized with the prevailing formation of meso stereoisomers (PRPS), which can form P,P-chelate platinum(II) complexes. In solution, the selective stereoconversion of the pure meso isomers into a mixture of PRPRCS(R) and PSPSCS(R) isomers was observed. Kinetic and DFT studies of this process were performed.

Interesting P2N ligands.

Thursday, March 29, 2012

Synthesis, Characterization, and Reactivity of Fe Complexes Containing Cyclic Diazadiphosphine Ligands: The Role of the Pendant Base in Heterolytic Cleavage of H2

Synthesis, Characterization,
and Reactivity of Fe
Complexes Containing Cyclic Diazadiphosphine Ligands: The Role of
the Pendant Base in Heterolytic Cleavage of H2
:
TOC Graphic
Journal of the American Chemical Society
DOI: 10.1021/ja211193j

Boron-Capped Tris(glyoximato) Cobalt Clathrochelate as a Precursor for the Electrodeposition of Nanoparticles Catalyzing H2 Evolution in Water

Boron-Capped Tris(glyoximato)
Cobalt Clathrochelate
as a Precursor for the Electrodeposition of Nanoparticles Catalyzing
H2 Evolution in Water
:
TOC Graphic
Journal of the American Chemical Society
DOI: 10.1021/ja301134e

Nonprecious Metal Catalysts for Fuel Cell Applications: Electrochemical Dioxygen Activation by a Series of First Row Transition Metal Tris(2-pyridylmethyl)amine Complexes

Nonprecious Metal Catalysts
for Fuel Cell Applications:
Electrochemical Dioxygen Activation by a Series of First Row Transition
Metal Tris(2-pyridylmethyl)amine Complexes
:
TOC Graphic
Inorganic Chemistry
DOI: 10.1021/ic2026957

Reaction of Aryl Diazonium Salts and Diiron(I) Dithiolato Carbonyls: Evidence for Radical Intermediates

Reaction of Aryl Diazonium
Salts and Diiron(I) Dithiolato
Carbonyls: Evidence for Radical Intermediates
:
TOC Graphic
Organometallics
DOI: 10.1021/om300107s

Spectroscopic and DFTStudy of Ferraaziridine ComplexesFormed in the Transfer Hydrogenation of Acetophenone Catalyzed Using trans-[Fe(CO)(NCMe)(PPh2C6H4CHNCH2−)2-κ4P,N,N,P](BF4)2

Spectroscopic and DFT
Study of Ferraaziridine Complexes
Formed in the Transfer Hydrogenation of Acetophenone Catalyzed Using trans-[Fe(CO)(NCMe)(PPh2C6H4CHNCH2−)2-κ4P,N,N,P](BF4)2
:
TOC Graphic
Organometallics
DOI: 10.1021/om201170f

Wednesday, March 28, 2012

The inverse sandwich complex [(K(18-crown-6))2Cp][CpFe(CO)2] - Unpredictable redox reactions of [CpFe(CO)2]I with the silanides Na[SiRtBu2] (R = Me, tBu) and the isoelectronic phosphanyl borohydride K[PtBu2BH3]

The inverse sandwich complex [(K(18-crown-6))2Cp][CpFe(CO)2] - Unpredictable redox reactions of [CpFe(CO)2]I with the silanides Na[SiRtBu2] (R = Me, tBu) and the isoelectronic phosphanyl borohydride K[PtBu2BH3]:
Dalton Trans., 2012, Accepted Manuscript
DOI: 10.1039/C2DT00031H, Paper
Hans-Wolfram Lerner
The dimeric iron carbonyl [CpFe(CO)2]2 and the iodosilanes tBu2RSiI were obtained from the reaction of [CpFe(CO)2]I with the silanides Na[SiRtBu2] (R= Me, tBu) in thf. By the reactions of [CpFe(CO)2]I...
The content of this RSS Feed (c) The Royal Society of Chemistry

Encapsulating [FeFe]-hydrogenase model compounds in peptide hydrogels dramatically modifies stability and photochemistry

Encapsulating [FeFe]-hydrogenase model compounds in peptide hydrogels dramatically modifies stability and photochemistry:
Dalton Trans., 2012, Accepted Manuscript
DOI: 10.1039/C2DT30307H, Paper
Pim Wilhelmus Johannes Maria Frederix, Rafal Kania, Joseph A Wright, Dimitrios A Lamprou, Rein Ulijn, C J Pickett, Neil T Hunt
A [FeFe]-hydrogenase model compound ([small micro]-S(CH2)3S)Fe2(CO)4(PMe3)2 [1] has been encapsulated in a Low Molecular Weight (LMW) hydrogelator (Fmoc-Leu-Leu). Linear infrared absorption spectroscopy, gel melting and ultrafast time-resolved infrared spectroscopy experiments reveal...
The content of this RSS Feed (c) The Royal Society of Chemistry

The Formal Potentials and Electrode Kinetics of the Proton/Hydrogen Couple in Various Room Temperature Ionic Liquids

The Formal Potentials and Electrode Kinetics of the Proton/Hydrogen Couple in Various Room Temperature Ionic Liquids:
Chem. Commun., 2012, Accepted Manuscript
DOI: 10.1039/C2CC31402A, Communication
Yao Meng, Leigh Aldous, Stephen Richard Belding, Richard G Compton
The Hydrogen evolution reaction has been quantitatively investigated at a Pt electrode in series of room temperature ionic liquids vs Ag / Ag+ redox couple, The measured formal potentials of...

Look at the reference 9 :)

Synthesis, Characterization,and Electrochemical Propertiesof Benzyloxy-Functionalized Diiron 1,3-Propanedithiolate ComplexesRelevant to the Active Site of [FeFe]-Hydrogenases

Synthesis, Characterization,
and Electrochemical Properties
of Benzyloxy-Functionalized Diiron 1,3-Propanedithiolate Complexes
Relevant to the Active Site of [FeFe]-Hydrogenases
:
TOC Graphic
Organometallics
DOI: 10.1021/om300136b

Tuesday, March 27, 2012

Influence of Second CoordinationSphere Hydroxyl Groups on the Reactivity of Copper(I) Complexes

Influence of Second Coordination
Sphere Hydroxyl Groups on the Reactivity of Copper(I) Complexes
:
TOC Graphic
Inorganic Chemistry
DOI: 10.1021/ic202207e

Bifunctional Rhenium Complexes for the Catalytic Transfer-Hydrogenation Reactions of Ketones and Imines

Bifunctional Rhenium Complexes for the Catalytic Transfer-Hydrogenation Reactions of Ketones and Imines:

Abstract

The silyloxycyclopentadienyl hydride complexes [Re(H)(NO)(PR3)(C5H4OSiMe2tBu)] (R=iPr (3 a), Cy (3 b)) were obtained by the reaction of [Re(H)(Br)(NO)(PR3)2] (R=iPr, Cy) with Li[C5H4OSiMe2tBu]. The ligand–metal bifunctional rhenium catalysts [Re(H)(NO)(PR3)(C5H4OH)] (R=iPr (5 a), Cy (5 b)) were prepared from compounds 3 a and 3 b by silyl deprotection with TBAF and subsequent acidification of the intermediate salts [Re(H)(NO)(PR3)(C5H4O)][NBu4] (R=iPr (4 a), Cy (4 b)) with NH4Br. In nonpolar solvents, compounds 5 a and 5 b formed an equilibrium with the isomerized trans-dihydride cyclopentadienone species [Re(H)2(NO)(PR3)(C5H4O)] (6 a,b). Deuterium-labeling studies of compounds 5 a and 5 b with D2 and D2O showed H/D exchange at the HRe and HO positions. Compounds 5 a and 5 b were active catalysts in the transfer hydrogenation reactions of ketones and imines with 2-propanol as both the solvent and H2 source. The mechanism of the transfer hydrogenation and isomerization reactions was supported by DFT calculations, which suggested a secondary-coordination-sphere mechanism for the transfer hydrogenation of ketones.
Thumbnail image of graphical abstract
The Re-al deal: Bifunctional rhenium complexes [Re(H)(NO)(PR3)(C5H4OH)] (R=Cy, iPr) of Shvo-type were prepared and used as catalysts for the transfer hydrogenation of ketones and imines. TOFs up to 1164 h−1 were obtained for ketones and up to 79 h−1 for imines. DFT calculations suggested a secondary-coordination-sphere mechanism for the transfer hydrogenation of ketones.

Sunday, March 25, 2012

A molecular ruthenium catalyst with water-oxidation activity comparable to that of photosystem II

A molecular ruthenium catalyst with water-oxidation activity comparable to that of photosystem II:



A molecular ruthenium catalyst with water-oxidation activity comparable to that of photosystem II



Nature Chemistry.
doi:10.1038/nchem.1301

Authors: Lele Duan, Fernando Bozoglian, Sukanta Mandal, Beverly Stewart, Timofei Privalov, Antoni Llobet & Licheng Sun

Increasing the efficiency and speed of the water-oxidation reaction is crucial to realizing light-driven water splitting. Now, a mononuclear ruthenium complex achieves fast water-oxidation catalysis with a high reaction rate of more than 300 turnovers per second, comparable to the activity of the oxygen-evolving complex in Photosystem II.

Friday, March 23, 2012

Site-Selective X-ray Spectroscopy on an Asymmetric Model Complex of the [FeFe] Hydrogenase Active Site

Site-Selective X-ray Spectroscopy
on an Asymmetric
Model Complex of the [FeFe] Hydrogenase Active Site
:
TOC Graphic
Inorganic Chemistry
DOI: 10.1021/ic2024154

Photo-induced oxidation of [FeII(N4Py)CH3CN] and related complexes

Photo-induced oxidation of [FeII(N4Py)CH3CN] and related complexes:
Dalton Trans., 2012, Accepted Manuscript
DOI: 10.1039/C2DT30392B, Paper
Apparao Draksharapu, Qian Li, Gerard Roelfes, Wesley Browne

The photochemistry of the complexes [Fe(N4Py)(CH3CN)](ClO4)2 (1) , where N4Py is (1,1-di(pyridin-2-yl)-N,N-bis(pyridin-2-ylmethyl)methanamine) and [Fe(MeN4Py)(CH3CN)](ClO4)2 (2), where MeN4Py (1,1-di(pyridin-2-yl)-N,N-bis(pyridin-2-ylmethyl)ethanamine), in water, dichloromethane and methanol, is described. Under UV or visible irradiation visible irradiation both 1 and 2 undergo enhancement of the rate of outer sphere electron transfer to 3O2 to yield the superoxide radical anion and the complexes in the Fe(III) redox state. Addition of ascorbic acid to the photoproduct leads to a recovery of the initial UV/Vis spectrum of 1 and 2, indicating that ligand oxidation does not occur.

we should learn to make this ligand.  The Npy4 theme would be good literature talk.

Complexes of Cu(I) supported by a tris(ketimine) tripod

Complexes of Cu(I) supported by a tris(ketimine) tripod:
Dalton Trans., 2012, Accepted Manuscript
DOI: 10.1039/C2DT30101F, Communication
Jeremiah Scepaniak, Guang Wu, Trevor W. Hayton
Arylation of tris(2-benzylnitrile)amine with PhLi, followed by aqueous work-up, results in the formation of a tripodal tris(ketamine) scaffold, N(ArCNHPh)3. N(ArCNHPh)3 readily coordinates a number of CuI salts, generating complexes that...
The content of this RSS Feed (c) The Royal Society of Chemistry

Perhaps interesting to Shishian

ModelStudies of Methyl CoM Reductase:Methane Formation via CH3–S Bond Cleavage of Ni(I)Tetraazacyclic Complexes Having Intramolecular Methyl Sulfide Pendants

Model
Studies of Methyl CoM Reductase:
Methane Formation via CH3–S Bond Cleavage of Ni(I)
Tetraazacyclic Complexes Having Intramolecular Methyl Sulfide Pendants
:
TOC Graphic
Inorganic Chemistry
DOI: 10.1021/ic300017k