Isolation and Characterization of the 2,2′-Azinobis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) Radical Cation-Scavenging Reaction Products of Arbutin

2016 ◽  
Vol 64 (38) ◽  
pp. 7285-7290 ◽  
Author(s):  
Akihiro Tai ◽  
Asako Ohno ◽  
Hideyuki Ito
Keyword(s):  
Radical Cation ◽  
Sulfonic Acid ◽  
Reaction Products ◽  
Isolation And Characterization

Serendipitous isolation of a triazinone-based air stable organic radical: synthesis, crystal structure, and computation

2020 ◽  
Vol 44 (26) ◽  
pp. 10781-10785
Author(s):  
Vedichi Madhu ◽  
Arun Kumar Kanakati ◽  
Samar K. Das
Keyword(s):  
Crystal Structure ◽  
Radical Cation ◽  
Organic Radical ◽  
Radical Cation Salt ◽  
Isolation And Characterization

Here we report the synthesis, isolation, and characterization of a dication salt, namely 4,6-bis(4,4′-bipyridinium)-1,3,5-triazin-2-one {12+(PF6)22−·2H2O1(PF6)2·2H2O}, and its radical cation salt, namely 4,6-bis(4,4′-bipyridinium)-1,3,5-triazin-2-one (1+˙PF6−1˙PF6).

Isolation and Characterization of the Cycloparaphenylene Radical Cation and Dication

2013 ◽  
Vol 52 (51) ◽  
pp. 13722-13726 ◽  
Author(s):  
Eiichi Kayahara ◽  
Takahiko Kouyama ◽  
Tatsuhisa Kato ◽  
Hikaru Takaya ◽  
Nobuhiro Yasuda ◽  
...  
Keyword(s):  
Radical Cation ◽  
Isolation And Characterization

Organosulfur oxoacids. Part 2. A novel dimethylthiourea metabolite — Synthesis and characterization of the surprisingly stable and inert dimethylaminoiminomethane sulfonic acid

2010 ◽  
Vol 88 (12) ◽  
pp. 1247-1255 ◽  
Author(s):  
Jeffrey L. Petersen ◽  
Adenike A. Otoikhian ◽  
Moshood K. Morakinyo ◽  
Reuben H. Simoyi
Keyword(s):  
Sulfonic Acid ◽  
Metabolic Activation ◽  
Crystal Form ◽  
Biologically Active ◽  
Sulfonic Acids ◽  
Isolation And Characterization ◽  
Acid Analogue ◽  
Ph Conditions ◽  
Metabolite Synthesis

A new metabolite of the biologically active thiocarbamide dimethylthiourea (DMTU) has been synthesized and characterized. DMTU’s metabolic activation in the physiological environment is expected to be dominated by S-oxygenation, which produces, successively, the sulfenic, sulfinic, and sulfonic acids before forming sulfate and dimethylurea. Only the sulfinic and sulfonic acids are stable enough to be isolated. This manuscript reports on the first synthesis, isolation, and characterization of the sulfonic acid: dimethylaminoiminomethanesulfonic acid (DMAIMSOA). It crystallizes in the orthorhombic Pbca space group and exists as a zwitterion in its solid crystal form. The negative charge is delocalized over the sulfonic acid oxygens and the positive charge is concentrated over the planar N–C–N framework rather than strictly on the sp2-hybridized cationic carbon center. As opposed to its sulfinic acid analogue, DMAIMSOA is extremely inert in acidic environments and can maintain its titer for weeks at pH 6 and below. It is, however, reasonably reactive at physiological pH conditions and can be oxidized to dimethylurea and sulfate by mild oxidants such as aqueous iodine.

Isolation and Characterization of the Cycloparaphenylene Radical Cation and Dication

2013 ◽  
Vol 125 (51) ◽  
pp. 13967-13971 ◽  
Author(s):  
Eiichi Kayahara ◽  
Takahiko Kouyama ◽  
Tatsuhisa Kato ◽  
Hikaru Takaya ◽  
Nobuhiro Yasuda ◽  
...  
Keyword(s):  
Radical Cation ◽  
Isolation And Characterization
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