A Room‐Temperature Stable Distonic Radical Cation

2020 ◽  
Vol 59 (52) ◽  
pp. 23830-23835 ◽  
Author(s):  
Xiaodan Chen ◽  
Liu Leo Liu ◽  
Shihua Liu ◽  
Hansjörg Grützmacher ◽  
Zhongshu Li
Keyword(s):  
Radical Cation ◽  
Room Temperature ◽  
Distonic Radical Cation

A Room‐Temperature Stable Distonic Radical Cation

2020 ◽  
Vol 132 (52) ◽  
pp. 24038-24043
Author(s):  
Xiaodan Chen ◽  
Liu Leo Liu ◽  
Shihua Liu ◽  
Hansjörg Grützmacher ◽  
Zhongshu Li
Keyword(s):  
Radical Cation ◽  
Room Temperature ◽  
Distonic Radical Cation

An N‐Heterocyclic‐Carbene‐Derived Distonic Radical Cation

2020 ◽  
Vol 59 (10) ◽  
pp. 3952-3955 ◽  
Author(s):  
Nolan M. Gallagher ◽  
Hong‐Zhou Ye ◽  
Shuting Feng ◽  
Jeffrey Lopez ◽  
Yun Guang Zhu ◽  
...  
Keyword(s):  
Radical Cation ◽  
Distonic Radical Cation

Elektrochemische Synthesen, XIV [1] Radikalkation-Salze des Naphthalins / Electrochemical Syntheses, XIV [1]. Radical Cation Salts of Naphthalene

1978 ◽  
Vol 33 (5) ◽  
pp. 498-506 ◽  
Author(s):  
Heinz P. Fritz ◽  
Helmut Gebauer ◽  
Peter Friedrich ◽  
Peter Ecker ◽  
Reinhold Artes ◽  
...  
Keyword(s):  
Radical Cation ◽  
Low Temperatures ◽  
Room Temperature ◽  
Specific Conductivity ◽  
Columnar Structure ◽  
Screw Axis ◽  
Radical Cation Salts ◽  
Difference Fourier ◽  
Pure Hydrocarbon

Abstract By anodic oxidation of naphthalene in H2CCl2/O.O2m Bu4NPF6 at -45 °C dark red-violet crystals of (C10H8)2PF6 can be obtained by electrocrystallisation. They are stable at low temperatures, however, decompose on warming. In solution and in the polycrystalline state these radical cation salts show only narrow e.p.r. signals without h.f.s. The specific conductivity of a polycrystalline pellet at room temperature was determined to be 0.12 ±0.046 Ohm-1 cm-1 . The structure determination of (C10H8)2PF6 yielded the tetragonal space group P42/n, Z = 2, a = b = 1156(2), c = 640(1) pm. Patterson synthesis and difference Fourier analyses showed the compound to have a columnar stacking of C10H8 units the long molecular axes of which are twisted alternately by 90° around a screw axis in c-direction, and the molecular planes of which are 320 pm apart. The PF6-ions have four nearest C10H8 neighbours lying in pairs in parallel planes 63 pm above and below that plane of PF6- perpendicular to the c-axis and containing a PF4 group. This is the first established case for a columnar structure of a pure hydrocarbon radical cation. (C10H8)2AsF6 is isomorphous.

External electric field promotes proton transfer in the radical cation of adenine–thymine

2016 ◽  
Vol 30 (21) ◽  
pp. 1650276 ◽  
Author(s):  
Guiqing Zhang ◽  
Shijie Xie
Keyword(s):  
Electric Field ◽  
Proton Transfer ◽  
External Electric Field ◽  
Radical Cation ◽  
Base Pair ◽  
Low Temperatures ◽  
Room Temperature ◽  
Theoretical Calculations ◽  
Base Pairs ◽  
Adenine Thymine

According to [Formula: see text] measurements, it has been predicted that proton transfer would not occur in the radical cation of adenine–thymine (A:T). However, recent theoretical calculations indicate that proton transfer takes place in the base pair in water below the room temperature. We have performed simulations of proton transfer in the cation of B-DNA stack composed of 10 A:T base pairs in water from 20 K to 300 K. Proton transfer occurs below the room temperature, meanwhile it could also be observed at the room temperature under the external electric field. Another case that interests us is that proton transfer bounces back after [Formula: see text][Formula: see text]300 fs from the appearance of proton transfer at low temperatures.

Accessing 1,2-Amino Alcohols and Diols through Photocatalytic Anti-Markovnikov Difunctionalisation of Ene-Carbamates and Enol Ethers

2020 ◽  
Author(s):  
Jerome Waser ◽  
Stefano Nicolai ◽  
Stephanie G. E. Amos
Keyword(s):  
Double Bond ◽  
Radical Cation ◽  
Amino Alcohol ◽  
Oxygen Transfer ◽  
Room Temperature ◽  
Organic Dye ◽  
Enol Ethers ◽  
Blue Led ◽  
Broad Variety ◽  
Led Irradiation

We report an atom-economical 1,2-oxyalkynylation of ene-carbamates and enol ethers based on the use of Ethynyl BenziodoXolone (EBX) as dual reagents for alkyne and oxygen transfer. The reaction occurs at room temperature under blue LED irradiation using an organic dye as a photocatalyst. A broad variety of 1-alkynyl-1,2-amino-alcohol and 1-alkynyl-1,2-diol scaffolds were obtained in up to 89% yield with anti-Markovnikov regioselectivity. The reaction is speculated to proceed via oxidation of the double bond to give a radical cation intermediate, enabling the selective difunctionalization of electron-rich alkenes.

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