Binding of ameso-Octaethyl Tris(pyrrole)−Mono(pyridine) Ligand to Titanium(III) and Titanium(IV):  A Monomeric Titanium(IV) Oxo Bis(pyridine)−Bis(pyrrole) Complex Derived from the C−O Bond Cleavage of Carbon Monoxide

1996 ◽  
Vol 15 (26) ◽  
pp. 5456-5458 ◽  
Author(s):  
Raffaella Crescenzi ◽  
Euro Solari ◽  
Carlo Floriani ◽  
Angiola Chiesi-Villa ◽  
Corrado Rizzoli
Keyword(s):  
Carbon Monoxide ◽  
Bond Cleavage ◽  
Pyridine Ligand

Carbon Monoxide Bond Cleavage Mediated by an Intramolecular Frustrated Lewis Pair: Access to New B/N Heterocycles via Selective Incorporation of Single Carbon Atoms

2021 ◽  
Author(s):  
Clemens Krempner ◽  
Chamila Manankandayalage ◽  
Daniel K Unruh
Keyword(s):  
Carbon Monoxide ◽  
Bond Cleavage ◽  
Frustrated Lewis Pair ◽  
Selective Incorporation

Utilizing an intramolecular frustrated Lewis pair (FLP) decorated with a strongly donating guanidino moiety enabled the formation of a thermally remarkably stable FLP-CO adduct, which at 120°C underwent CO migration...

scholarly journals Carbon Monoxide Activation by a Molecular Aluminium Imide: C−O Bond Cleavage and C−C Bond Formation

2020 ◽  
Vol 59 (12) ◽  
pp. 4897-4901 ◽  
Author(s):  
Andreas Heilmann ◽  
Jamie Hicks ◽  
Petra Vasko ◽  
Jose M. Goicoechea ◽  
Simon Aldridge
Keyword(s):  
Carbon Monoxide ◽  
Bond Cleavage ◽  
Bond Formation

Solid-State Methylamine VUV Irradiation Study Using Carbon Monoxide as an H Radical Scavenger

2012 ◽  
Vol 65 (2) ◽  
pp. 129 ◽  
Author(s):  
Jean-Baptiste Bossa ◽  
Fabien Borget ◽  
Fabrice Duvernay ◽  
Grégoire Danger ◽  
Patrice Theulé ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Vacuum Ultraviolet ◽  
Solid Phase ◽  
Bond Cleavage ◽  
Branching Ratios ◽  
Radical Scavenger ◽  
Hydrogen Atoms ◽  
Hydrogen Flow ◽  
Rough Approximation ◽  
Nitrogen Hydrogen Bond

Solid-phase methylamine (CH3NH2) was vacuum ultraviolet (VUV) photoprocessed at low temperature (20 K) using a hydrogen flow discharge lamp, which allows irradiation down to 120 nm. Methanimine (CH2=NH), the methylammonium cation (CH3NH3+) and the counterion CN–, as well as the amino radical (NH2), methane (CH4) and ammonia (NH3), were identified as the photoproducts by using FTIR spectroscopy. So far, the branching ratios of the photodissociation pathways of methylamine in the solid phase remain unknown. The methylamine molecule holds two non-equivalent hydrogen atoms on the methyl and the amino group, so we can expect the formation of two distinct radicals via a carbon–hydrogen or a nitrogen–hydrogen bond cleavage, namely CH2NH2 and CH3NH. These radicals are highly reactive and may reform methylamine with hydrogen atom recombination. Their direct infrared spectroscopic detection is therefore tricky. To solve that problem, we use carbon monoxide (CO) as an H radical scavenger, forming the intermediate species HCO. After the irradiation of a CH3NH2 : CO binary ice mixture, formamide (NH2CHO) and N-methylformamide (CH3NHCHO) were identified as the main photoproducts using both infrared and mass spectrometry. We give a rough approximation of the branching ratios, which are in agreement with previous studies in the gas phase.

scholarly journals Nickel-catalyzed carbonylation of thioacetates with aryl iodides via CO insertion and C–S bond cleavage

2021 ◽  
pp. 174751982110281
Author(s):  
Wen-Peng Mai ◽  
Hong-Da Sui ◽  
Ming-Xiu Lv ◽  
Kui Lu
Keyword(s):  
Carbon Monoxide ◽  
Bond Cleavage ◽  
Cost Effective ◽  
Direct Approach ◽  
Coupling Process ◽  
Aryl Iodides ◽  
Co Insertion

Aryl thioesters are synthesized via nickel-catalyzed carbonylation of thioacetates with aryl iodides. Alkyl thioacetates undergo coupling with carbon monoxide and aryl iodides to produce the desired aryl thioesters in moderate yields. This catalytic carbonylative coupling process provides a cost-effective and direct approach for the preparation of useful thioesters.

Notizen: Neuartige basische Liganden für die homogenkatalytische Methanolcarbonylierung, XV [1]. (Ether-Phosphan)-stabilisierter cis-Dihydrido-Rhodium(III)-Komplex / Novel Basic Ligands for the Homogenous Catalytic Methanolcarbonylation, XV [1]. (Ether-Phosphane)-Stabilized cis-Dihydrido-rhodium(III) Complex

1988 ◽  
Vol 43 (3) ◽  
pp. 369-370 ◽  
Author(s):  
Ekkehard Lindner ◽  
Berthold Andres
Keyword(s):  
Carbon Monoxide ◽  
Bond Cleavage ◽  
Rhodium Complex

Reaction of [Rh(NBD)(P∼O)2][SbF6] (1) (NBD = norbornadiene) with hydrogen results in the formation of the stable dihydrido rhodium complex [cis- (2). Rh - O bond cleavage in 2 by carbon monoxide or NaBH4 affords the products [trans-(P∼O)2Rh(CO)3][SbF6] (3) and [trans-H2Rh((P∼O)2(η2-H2BH2)] (5), respectively. Upon treating a THF solution of 3 with argon, 3 eliminates CO to give the complex (4) with a mono- and bidentate (ether-phosphane) ligand.

Water-promoted interfacial pathways in methane oxidation to methanol on a CeO2-Cu2O catalyst

Science ◽  
2020 ◽  
Vol 368 (6490) ◽  
pp. 513-517 ◽  
Author(s):  
Zongyuan Liu ◽  
Erwei Huang ◽  
Ivan Orozco ◽  
Wenjie Liao ◽  
Robert M. Palomino ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Carbon Monoxide ◽  
Photoelectron Spectroscopy ◽  
Density Functional ◽  
Kinetic Monte Carlo ◽  
Bond Cleavage ◽  
Ambient Pressure ◽  
Density Functional Theory Calculations ◽  
Methanol Production ◽  
Methoxy Groups

Highly selective oxidation of methane to methanol has long been challenging in catalysis. Here, we reveal key steps for the pro­motion of this reaction by water when tuning the selectivity of a well-defined CeO2/Cu2O/Cu(111) catalyst from carbon monoxide and carbon dioxide to methanol under a reaction environment with methane, oxygen, and water. Ambient-pressure x-ray photoelectron spectroscopy showed that water added to methane and oxygen led to surface methoxy groups and accelerated methanol production. These results were consistent with density functional theory calculations and kinetic Monte Carlo simulations, which showed that water preferentially dissociates over the active cerium ions at the CeO2–Cu2O/Cu(111) interface. The adsorbed hydroxyl species blocked O-O bond cleavage that would dehydrogenate methoxy groups to carbon monoxide and carbon dioxide, and it directly converted this species to methanol, while oxygen reoxidized the reduced surface. Water adsorption also displaced the produced methanol into the gas phase.

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