C–H activation reaction
Oxidation of an o tolyl phosphine complex of platinum : C H activation and transcyclometallation
... protons is around 40, about 20 units lower than an alkyl chain, due to resonance effects from the aryl ring, and this reduction in pKa must be sufficient to now render the deprotonation a viable reaction pathway, ...
17
Activation of B-H, Si-H, and C-F bonds with Tp′Rh(PMe3) complexes : Kinetics, mechanism, and selectivity
... − H, Si − H, C − F, and C − H ...alkane C − H bond activator, it proves selective toward B − H and Si − H bonds over competing alkyl and aryl C − ...
16
Investigations of C-H and N-H activation with electron deficient iridium pincer complexes
... this reaction to go to completion in a respectable time, excess norbornene must be added to the reaction ...1 H NMR ...1 H signals are seen for the t-butyl signals, one for the pair cis to the ...
159
A Combined Experimental and Computational Study of Ligand Effects on C H Bond Activation by Palladium and Platinum Complexes
... the reaction, isotopic redistribution (or equilibrium) between these chemicals will affect the initial H/D ratio of the reactant as well as the observed values of ...
187
Microwave assisted benzylic c h activation using ruthenium catalysts Synthesis of lactams
... some reaction crudes in which Ru3 was successfully used in the synthesis of lactams 2 showed a strong acidic pH of the reaction ...the reaction crudes but were isolated after purification by ...
7
Hydrocarbon C-H activation with Tp[prime]Pt complexes
... Due to the thermodynamic instability associated with most Pt(IV) alkyl hydride complexes, much of the mechanistic work on the C-H activation step has been undertaken on the microscopic reverse ...
111
Selectivity of C-H activation and competition between C-H and C-F bond activation at fluorocarbons
... from C-H and C-F that dominates over the alternative where two C-H bonds have been activated (Scheme ...This reaction, however, depends on the experimental ...double ...
128
Mechanistic Insights into Alkane C H Activation and Functionalization by Metal Oxide Surfaces and Organometallic Complexes
... this reaction is not suitable for metal complexes with high-energy ...activating C-H bonds can be catalytically regenerated after oxidation of those oxophilic ...alkane C-H ...
206
Iridium-catalysed ortho-H/D and -H/T exchange under basic conditions : C-H activation of unprotected tetrazoles
... selected reaction conditions, the scope of this method for C-H activation and labelling of unprotected 2- aryltetrazoles was investigated (Scheme ...
68
Synthesis and Characterization of Iridium Acetate Complexes for the Activation and Functionalization of C-H Bonds.
... Computational Studies. Theoretical calculations have been carried out using the Gaussian09 65 implementation of BP86 density functional theory. 66 All calculations were conducted with the same basis set combination. The ...
282
A study of ligand substitution and its importance in the C–H activation of methane and methanol
... Relative ligand trans-influence can be measured by examining the bond lengths of the ligand trans to the N-heterocyclic carbene ligand. 21 Thus, any differences in the platinum–sulfur bond lengths among the series 2c – ...
111
Cp*Ir Complexes Relevant to C-H Activation and Oxidation Reactions.
... Catalyst 3 with 2 equivs of AgOTf gives the highest TON for this reaction with complete conversion to the oxidized product, acetophenone (Entry 1). However, catalyst 4 under the same conditions only achieves ~40% ...
190
Organometallic Reaction Mechanisms: Olefin Polymerization Catalysis and C H Bond Activation by Early Transition Metal Bisphenolate Complexes and Protonolysis of Bipyrimidine Platinum Methyl Complexes
... bond activation, C-P bond cleavage, addition of solvent to ligand—that led to further assembly into oligomeric structures with intricate and unusual interconnections, which (while gladdening the collector’s ...
308
Investigations of C-H Activation and the Conversion of Methanol to Triptane
... Initial experiments for quantifying methyl iodide were attempted by employing gas chromatography (GC) and elemental analysis. First, calibration curves of methyl iodide versus cyclohexane (the internal standard used for ...
341
Cp*Ir(III)-Catalyzed Isoquinolone Synthesis via C-H Activation and Functionalization of Benzamides.
... the reaction, thus minimizing the amounts of toxic waste ...catalytic activation of C-H bonds in benzene has been achieved utilizing ...directed C-H activation and ...
195
Iridium-catalyzed C-H activation and deuteration of primary sulfonamides : an experimental and computational study
... the steric influence of the NHC ligand on the catalyst is felt even by substituent groups at such a remote position relative to the ligating center of the substrate. To demonstrate the prac- ticality of the HIE ...
11
Mechanisms of C H Bond Activation by Platinum(II)
... preference for internal reaction. However, it seems more likely that the terminal olefin complex is rapidly isomerized to the internal isomers via the olefin insertion/ β -H elimination sequence. Such a ...
142
Increasing Catalyst Efficiency in C−H Activation Catalysis
... sufficient to obtain near quantitative yields within 4 hours at room temperature, translating to TONs of up to 194. In a series of experiments, the catalyst loading was decreased while increasing the reaction time ...
13
Tuning the Reactivity of Terminal Nickel(III)?Oxygen Adducts for C?H Bond Activation
... The reactions between 2b and 3b and 2,6-DTBP were monitored by electronic absorption spectroscopy: upon addition of an excess of substrate (>10 equiv. 2,6-DTBP) to 0.3 mM solutions of 2b and 3b in acetone, decay of ...
9
Rhodium(III)-Catalyzed C-H Activation/Annulation with Vinyl Esters as an Acetylene Equivalent
... of reaction with electron-rich alkenes (Figure 1): electronic factors favour for- mation of intermediate 14 by migration of rhodium to the more electron-rich carbon of enol ...
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