ChemInform Abstract: In situ Generation and Utilization of Electrophilic Selenium Species ( PhSe+) by Photooxidative (Single Electron Transfer) Cleavage of Diphenyl Diselenide (PhSeSePh).

ChemInform ◽  
1992 ◽  
Vol 23 (51) ◽  
pp. no-no
Author(s):  
G. PANDEY ◽  
B. B. V. S. SEKHAR
Keyword(s):  
Electron Transfer ◽  
Single Electron ◽  
Single Electron Transfer ◽  
Diphenyl Diselenide ◽  
Selenium Species ◽  
In Situ Generation

Effect of alkyl group length on the conductivity in the 2,3,7,8,12,13,17,18-octakis(alkyl-thio)tetraazaporphyrins and redox properties of the metallooctakis(hexyl-thio)tetraazaporphyrins

2002 ◽  
Vol 06 (07) ◽  
pp. 447-455
Author(s):  
Bin Yu ◽  
Yanxiu Zhou ◽  
Daike Wang ◽  
Zhenxing Wang ◽  
Kenichi Sugiura ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Cation Radical ◽  
Differential Pulse ◽  
Single Electron ◽  
Central Metal Atom ◽  
Central Metal ◽  
Single Electron Transfer ◽  
Electron Transfer Pathways ◽  
Chain Lengths

A series of 2,3,7,8,12,13,17,18-octakis(alkyl-thio)tetraazaporphyrins (H2OATTAP) with different alkyl chain lengths have been synthesized. Cyclic voltammetry and differential pulse voltammetry have been used to investigate the effect of the controlled lengths of the eight peripheral thioether tails on the redox behavior of the molecules. The electrochemical reduction of octakis(hexyl-thio)tetraazaporphyrins, MOHTTAP (where M = Cu , Ni ), was studied in 1,2-dichloroethane at a platinum electrode. The Cu derivative was oxidized in one single-electron-transfer step to yield a π-cation radical and reduced in three single-electron-transfer steps to yield a π-anion radical, dianion and trianion, respectively. For the Ni derivative, electron transfer reactions involving both the central metal atom and the macrocyclic ring were observed. Electron transfer pathways are proposed based upon voltammetric and in situ spectroelectrochemical results.

Electrochemical and in situ spectroelectrochemical behavior of 2,3,7,8,12,13,17,18-octakis(hexyl-thio) tetraazaporphyrin (H2OHTTAP) and [Zn(II)OHTTAP]

2001 ◽  
Vol 05 (06) ◽  
pp. 523-527 ◽  
Author(s):  
YANXIU ZHOU ◽  
ZHENXING WANG ◽  
DAIKE WANG ◽  
KENICHI SUGIURA ◽  
YOSHITERU SAKATA
Keyword(s):  
Electron Transfer ◽  
Differential Pulse ◽  
Single Electron ◽  
Single Electron Transfer ◽  
Free Base ◽  
Cation Radicals ◽  
Pulse Voltammetry ◽  
Electron Reduction

The characterization of free base porphyrin 2,3,7,8,12,13,17,18-octakis(hexyl-thio) tetraazaporphyrin (H2OHTTAP) and its zinc(II) complexes [ Zn (II)OHTTAP] containing eight thioether groups at the β-pyrrole positions of the macrocycle was reported. Results obtained by cyclic voltammetry and differential pulse voltammetry indicated a five-electron reduction in five steps for each complex. They were oxidized in two single-electron-transfer steps to yield π-cation radicals and dications and reduced in three single-electron-transfer steps to yield π-anion radicals, dianions and trianions, respectively. The redox property of H2OHTTAP was unusual as compared to porphyrins (PPs) and phthalocyanines (Pcs). Each process was monitored by in situ thin-layer spectroelectrochemistry, which indicated that only the ligand was electroactive. The existence of the eight hexylthio groups was responsible for the intrastack interactions and enhanced intracolumnar and intercolumnar electron motions, resulting in improved conductivity.

Reversal of Polarity by Catalytic SET Oxidation: Synthesis of Azabicyclo[m.n.o]alkanes via Chemoselective Reduction of Amidines

2021 ◽  
Author(s):  
Sundarababu Baskaran ◽  
Kirana D V ◽  
Kanak Kanti Das
Keyword(s):  
Electron Transfer ◽  
Stereoselective Synthesis ◽  
Single Electron ◽  
Single Electron Transfer ◽  
Catalytic Method ◽  
One Pot ◽  
Oxidative System ◽  
Oxidation Synthesis

A one-pot catalytic method has been developed for the stereoselective synthesis of cyclopropane-fused cyclic amidines using CuBr2/K2S2O8 as an efficient single electron transfer (SET) oxidative system. The generality of this...

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