34234-86-1

Upstream product

• 67-56-1 methanol 
• 3376-24-7 (Z)-N-benzylidene-2-methylpropan-2-amine oxide 
• 34557-54-5 methane 
• 3376-24-7 N-tert-butyl-α-phenylnitrone 

Relevant academic research and scientific papers

1,2-Diazacyclopentane-3,5-diyl Diradicals: Electronic Structure and Reactivity

Localized singlet diradicals are key intermediates in bond homolysis. A thorough study of the reactive species is needed to clarify the mechanisms of the homolytic bond cleavage and formation processes. In general, the singlet diradicals are quite short-lived because of the fast radical-radical coupling reactions. The short-lived characteristic has retarded the thorough study on bond homolysis. In this study, a new series of long-lived singlet diradicals, viz., 1,2-diazacyclopentane-3,5-diyl, were identified, and their electronic structures and novel reactivities were thoroughly studied using laser-flash photolysis (LFP), product analysis, and computational studies. A direct observation of the thermal equilibration (fast process) between the singlet diradicals and the corresponding ring-closing compounds was undertaken on the submicrosecond time scale. The solvent and substituent effects on the equilibration constant and rate constants for the ring-closing reaction and ring-opening reaction clarify the novel nitrogen-atom effect on the localized singlet 1,3-diyl diradicals. Two types of alkoxy-migrated compounds, 9 and 10, were isolated with high yields as the final products. Crossover, spin-trapping, and LFP experiments for the formation of alkoxy-group migration products (i.e., 9 versus 10) revealed the unique temperature effect on the product ratio of the two types of alkoxy-migration products. The temperature-insensitive intersystem crossing process (slow process, millisecond time scale) was found to be a key step in the formation of 9, which is an entropy-controlled pathway. An intramolecular migration process was identified for the formation of 10 that was accelerated by a polar solvent in an enthalpy-controlled process. This unique heteroatom effect has opened up a new series of localized singlet diradicals that are crucial intermediates in bond homolysis.

Radical Trifluoromethoxylation of Arenes Triggered by a Visible-Light-Mediated N?O Bond Redox Fragmentation

A simple trifluoromethoxylation method enables non-directed functionalization of C?H bonds on a range of substrates, providing access to aryl trifluoromethyl ethers. This light-driven process is distinctly different from conventional procedures and occurs through an OCF3 radical mechanism mediated by a photoredox catalyst, which triggers an N?O bond fragmentation. The pyridinium-based trifluoromethoxylation reagent is bench-stable and provides access to synthetic diversity in lead compounds in an operationally simple manner.

Kinetic and Electron Paramagnetic Resonance Studies of Photochemical Reactions of Gas Mixtures of Methane, Ammonia and Water

Photoactivation of methane has been kinetically studied in the CH4-NH3-H2O mixture, and the radical intermediates measured by the spin trap (PBN, α-phenyl-N-tert-butylnitrone)-EPR method.The trapped radicals were CH3O. (aN = 1.35, aβH = 0.20 mT), .CH2NH2 (aN = 1.46, aβH = 0.26 mT), and .CH=NH (aN = 1.48, aβH = 0.62 mT).It was suggested that .CH2NH2 was mainly provided by H abstraction from methylamine and the photolysis of CH3NH2 to CH3NH. and .CH2NH2 was low.The coupling of .CH2NH2 led to the formation of ethylenediamine, while CH3NH. decayed to CH2=NH from which the .CH=NH radical was generated by the H elimination.The water photolysis proceeded with a quantum yield of 0.06 in the gas mixture.

Photo-oxidation of Alcohols by Hexachlorometalate(IV) Ions (M = Pt, Pd, or Ir): Spin Trapping and Matrix Isolation Electron Spin Resonance Studies

Spin-trapping studies reveal that whereas the mild (λ > 380 nm) photolysis of ions 2- (M = Pd, Pt, or Ir) in alcohol (RCH2OH)-water mixtures leads invariably to RHOH, in pure alcoholic media many of the oxidations lead to RCH2.Prolonged, wide-band photolysis leads to the production of H atoms.At 77 K, wide-band photolysis leads to the production of platinum(III) and palladium(III) centres, identifies by their g features, in addition to the expected C-centred organic radicals.