Multielectron C–H photoactivation with an Sb(v) oxo corrole

2020 ◽  
Vol 56 (39) ◽  
pp. 5247-5250
Author(s):  
Christopher M. Lemon ◽  
Andrew G. Maher ◽  
Anthony R. Mazzotti ◽  
David C. Powers ◽  
Miguel I. Gonzalez ◽  
...  
Keyword(s):  
Electron Process

An Sb(v) bis-μ-oxo corrole dimer performs photochemical multielectron C–H activation, oxidising toluene to benzaldehyde in a four-electron process.

On the Conrotatory Ring Opening of 3-Carbomethoxycyclobutene Vis-À-Vis 3-Carbomethoxy-1,2-Benzocyclobutene and the Predominant Inward Opening of 3-Dimethylaminocarbonyl-1,2-Benzocyclobutene

2018 ◽  
Author(s):  
Veejendra Yadav ◽  
Dasari L V K Prasad ◽  
Arpita Yadav ◽  
Maddali L N Rao
Keyword(s):  
Transition State ◽  
Ring Opening ◽  
Electron Process ◽  
Ring Opening Reaction ◽  
Stable Species ◽  
Electron Event

<p>The torquoselectivity of conrotatory ring opening of 3-carbomethoxycyclobutene is controlled by p<sub>C1C2</sub>→s*<sub>C3C4</sub> and s<sub>C3C4</sub>→p*<sub>CO</sub> interactions in the transition state in a 4-electron process as opposed to only s<sub>C3C4</sub>→p*<sub>CO</sub> interaction in an apparently 8-electron event in 3-carbomethoxy-1,2-benzocyclobutene. The ring opening of 3-carbomethoxy-1,2-benzocyclobutene is sufficiently endothermic. We therefore argue that the reverse ring closing reaction is faster than the forward ring opening reaction and, thus, it establishes an equilibrium between the two and subsequently allows formation of the more stable species <i>via</i> outward ring opening reaction. Application of this argument to 3-dimethylaminocarbonyl-1,2-benzocyclobutene explains the predominantly observed inward opening.</p>

Copper-catalyzed rapid C–H nitration of 8-aminoquinolines by using sodium nitrite as the nitro source under mild conditions

RSC Advances ◽  
2016 ◽  
Vol 6 (92) ◽  
pp. 89979-89983 ◽  
Author(s):  
Xiaolei Zhu ◽  
Li Qiao ◽  
Pingping Ye ◽  
Beibei Ying ◽  
Jun Xu ◽  
...  
Keyword(s):  
Sodium Nitrite ◽  
Single Electron ◽  
Mild Conditions ◽  
Electron Process

We report the first example of copper(ii) catalyzed remote C–H nitration of 8-aminoquinoline amides by using sodium nitrite as nitration reagent under mild conditions in 1 minute which undergoes single electron process.

Highly selective conversion of CO2 to C2H6 on graphene modified chlorophyll Cu through multi-electron process for artificial photosynthesis

Nanoscale ◽  
2019 ◽  
Vol 11 (47) ◽  
pp. 22980-22988 ◽  
Author(s):  
Tongshun Wu ◽  
Cheng Zhu ◽  
Dongxue Han ◽  
Zhenhui Kang ◽  
Li Niu
Keyword(s):  
Electron Transfer ◽  
Artificial Photosynthesis ◽  
Electron Transfer Pathway ◽  
Selective Conversion ◽  
Electron Process

A highly selective photocatalyst extracted and modified from silkworm excrement reduced CO2 into C2H6 through a multi-electron transfer pathway.

Theory of Detection of X-Rays by Superconductors

1997 ◽  
Vol 11 (19) ◽  
pp. 849-859 ◽  
Author(s):  
N. Murali Krishna ◽  
Lydia S. Lingam ◽  
Keshav N. Shrivastava
Keyword(s):  
Low Temperatures ◽  
Cooper Pair ◽  
Single Electron ◽  
Superconducting Film ◽  
Pair Breaking ◽  
X Rays ◽  
X Ray ◽  
Electron Process

Two new processes occur in a superconducting film when it is used as a detector of X-rays. One of these processes is the scattering of the X-ray by a single electron which gives rise to the broadening of the X-ray line. Another process describes the breaking of a Cooper pair by the X-ray which also contributes to the width of the X-ray. The line arising from the single electron process depends on T4 whereas that arising from the pair breaking process varies almost as T6 at low temperatures. Lines occur at ℏωq ± 2Δ, and at ℏωq where ℏωq is the energy of the X-ray and 2Δ is the gap of the superconductor.

Influence of core property on multi-electron process in slow collisions of isocharged sequence ions with neon

2010 ◽  
Vol 19 (11) ◽  
pp. 115202 ◽  
Author(s):  
Rong-Chun Lu ◽  
De-Yang Yu ◽  
Cao-Jie Shao ◽  
Fang-Fang Ruan ◽  
Xiao-Hong Cai
Keyword(s):  
Electron Process ◽  
Core Property

scholarly journals Mechanism of a one-photon two-electron process in photocatalytic hydrogen evolution from ascorbic acid with a cobalt chlorin complex

2015 ◽  
Vol 51 (82) ◽  
pp. 15145-15148 ◽  
Author(s):  
Shoko Aoi ◽  
Kentaro Mase ◽  
Kei Ohkubo ◽  
Shunichi Fukuzumi
Keyword(s):  
Electron Transfer ◽  
Ascorbic Acid ◽  
Hydrogen Evolution ◽  
Photocatalytic Hydrogen Evolution ◽  
Electron Process

A one-photon two-electron process was made possible in photocatalytic H2 evolution from ascorbic acid with a cobalt(ii) chlorin complex via electron transfer.

Electrochemical behavior of C-methoxy, amino, cyano, and mercapto nitrones

1992 ◽  
Vol 70 (7) ◽  
pp. 2076-2080 ◽  
Author(s):  
Bruce J. Acken ◽  
David E. Gallis ◽  
James A. Warshaw ◽  
DeLanson R. Crist
Keyword(s):  
Cyclic Voltammetry ◽  
Electrochemical Behavior ◽  
Spin Trapping ◽  
Redox Behavior ◽  
Electron Process ◽  
Controlled Potential Electrolysis ◽  
Controlled Potential

The redox behavior of various C-substituted nitrones was investigated by cyclic voltammetry in acetonitrile. These included C-methoxynitrones (MeO)CR = N(O)t-Bu with R = C6H5(1a), p-MeOC6H4 (1b), p-NO2C6H4 (1c), and H (1d) and nitrones YCH = N(O)t-Bu with Y = n-BuS (2a), CN (2b), and C6H5NH (2c). All gave anodic peaks which can be identified as oxidations of the nitrone function. Controlled potential electrolysis of 1a at 1.05 V (SCE) showed that its oxidation was a one-electron process. Reduction of 1a occurs stepwise at −2.08 and at −2.47 V, the same potential for reduction of methyl N-tert-butylbenzimidate (MeO)CPh = Nt-Bu. With electrochemical windows of ca. 3 V, all of the nitrones studied appear suitable for spin-trapping experiments.

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