Synthesis and Characterization of Functionalized Analogs of 1,3,6,8-Tetrakis(methylsulfanyl)pyrene and Their Electron-Conducting Radical-Cation Salts

1994 ◽  
Vol 116 (22) ◽  
pp. 9890-9893 ◽  
Author(s):  
Tiechao Li ◽  
Richard Giasson
Keyword(s):  
Radical Cation ◽  
Synthesis And Characterization ◽  
Radical Cation Salts

The synthesis and characterization of radical cation salts of bis(ethylenedithio)tetraselenafulvalene

1993 ◽  
Vol 56 (1) ◽  
pp. 2090-2095 ◽  
Author(s):  
L.K. Montgomery ◽  
T. Burgin ◽  
J.C. Huffman ◽  
K.D. Carlson ◽  
J.D. Dudek ◽  
...  
Keyword(s):  
Radical Cation ◽  
Synthesis And Characterization ◽  
Radical Cation Salts

scholarly journals Chiral Radical Cation Salts of Me-EDT-TTF and DM-EDT-TTF with Octahedral, Linear and Tetrahedral Monoanions

2021 ◽  
Vol 7 (6) ◽  
pp. 87
Author(s):  
Nabil Mroweh ◽  
Alexandra Bogdan ◽  
Flavia Pop ◽  
Pascale Auban-Senzier ◽  
Nicolas Vanthuyne ◽  
...  
Keyword(s):  
Radical Cation ◽  
Mixed Valence ◽  
Relative Location ◽  
Molecular Conductors ◽  
Resistivity Measurements ◽  
Counter Ions ◽  
Stereogenic Centers ◽  
Radical Cation Salts ◽  
Power Measurements

Methyl-ethylenedithio-tetrathiafulvalene (Me-EDT-TTF (1) and dimethyl-ethylenedithio-tetrathiafulvalene (DM-EDT-TTF (2) are valuable precursors for chiral molecular conductors, which are generally obtained by electrocrystallization in the presence of various counter-ions. The number of the stereogenic centers, their relative location on the molecule, the nature of the counter-ion and the electrocrystallization conditions play a paramount role in the crystal structures and conducting properties of the resulting materials. Here, we report the preparation and detailed structural characterization of the following series of radical cation salts: (i) mixed valence (1)2AsF6 as racemic, and (S) and (R) enantiomers; (ii) [(S)-1]AsF6·C4H8O and [(R)-1]AsF6·C4H8O where a strong dimerization of the donors is observed; (iii) (1)I3 and (2)I3 as racemic and enantiopure forms and (iv) [(meso)-2]PF6 and [(meso)-2]XO4 (X = Cl, Re), based on the new donor (meso)-2. In the latter, the two methyl substituents necessarily adopt axial and equatorial conformations, thus leading to a completely different packing of the donors when compared to the chiral form (S,S)/(R,R) of 2 in its radical cation salts. Single crystal resistivity measurements, complemented by thermoelectric power measurements in the case of (1)2AsF6, suggest quasi-metallic conductivity for the latter in the high temperature regime, with σRT ≈ 1–10 S cm–1, while semiconducting behavior is observed for the (meso)-2 based salts.

scholarly journals Isolation of base stabilized fluoroborylene and its radical cation

2019 ◽  
Vol 48 (24) ◽  
pp. 8551-8555 ◽  
Author(s):  
Samir Kumar Sarkar ◽  
Mujahuddin M. Siddiqui ◽  
Subrata Kundu ◽  
Munmun Ghosh ◽  
Johannes Kretsch ◽  
...  
Keyword(s):  
Radical Cation ◽  
Synthesis And Characterization ◽  
Metal Free

The synthesis and characterization of metal-free fluoroborylene [(Me-cAAC)2BF] (1) is reported.

Sign in / Sign up

Export Citation Format

Share Document