scholarly journals cis-Thioindigo (TI) – a new ligand with accessible radical anion and dianion states. Strong magnetic coupling in the {[TI-(μ2-O),(μ-O)]Cp*Cr}2dimers

2017 ◽  
Vol 46 (41) ◽  
pp. 14365-14372 ◽  
Author(s):  
Dmitri V. Konarev ◽  
Salavat S. Khasanov ◽  
Alexander F. Shestakov ◽  
Alexey M. Fatalov ◽  
Mikhail S. Batov ◽  
...  
Keyword(s):  
Spin State ◽  
Radical Anion ◽  
Magnetic Coupling ◽  
Coordination Complex ◽  
Radical Anions ◽  
First Time

A coordination complex containing thioindigo (TI2−) dianions and Cr3+with a highS= 3/2 spin state and salt {cryptand[2,2,2](Na+)}(TI˙−) (2) with paramagnetic TI˙−radical anions have been studied for the first time.

Strong magnetic coupling of spins in Fe(ii) dimers with differently charged thioindigo ligands

2020 ◽  
Vol 49 (23) ◽  
pp. 7692-7696 ◽  
Author(s):  
Dmitri V. Konarev ◽  
Alexey V. Kuzmin ◽  
Mikhail S. Batov ◽  
Salavat S. Khasanov ◽  
Akihiro Otsuka ◽  
...  
Keyword(s):  
High Spin ◽  
Radical Anion ◽  
Magnetic Coupling ◽  
Coordination Complex ◽  
Radical Anions ◽  
Oxygen Atoms

Coordination complex of iron(ii) with radical anion and dianion of thioindigo {[2.2.2]cryptand(K+)}2{FeII(TI˙−)(TI2−)}2·2C6H4Cl2 (1) is obtained. Complex has two high-spin FeII centers separated by oxygen atoms, and two TI˙− radical anions coordinated to FeII.

Stability of radical anions derived from substituted 5-nitrofurans investigated by ESR spectroscopy

1985 ◽  
Vol 50 (7) ◽  
pp. 1594-1601 ◽  
Author(s):  
Jiří Klíma ◽  
Larisa Baumane ◽  
Janis Stradinš ◽  
Jiří Volke ◽  
Romualds Gavars
Keyword(s):  
Radical Anion ◽  
High Stability ◽  
Esr Spectroscopy ◽  
Reaction Path ◽  
Order Reaction ◽  
Second Order ◽  
Radical Anions ◽  
Second Order Reaction ◽  
Unpaired Electron Density ◽  
The Stability

It has been found that the decay in dimethylformamide and dimethylformamide-water mixtures of radical anions in five of the investigated 5-nitrofurans is governed by a second-order reaction. Only the decay of the radical anion generated from 5-nitro-2-furfural III may be described by an equation including parallel first- and second-order reactions; this behaviour is evidently caused by the relatively high stability of the corresponding dianion, this being an intermediate in the reaction path. The presence of a larger conjugated system in the substituent in position 2 results in a decrease of the unpaired electron density in the nitro group and, consequently, an increase in the stability of the corresponding radical anions.

scholarly journals Crystalline salts of metal phthalocyanine radical anions [M(Pc˙3−)]˙− (M = CuII, PbII, VIVO, SnIVCl2) with cryptand(Na+) cations: structure, optical and magnetic properties

2017 ◽  
Vol 41 (14) ◽  
pp. 6866-6874 ◽  
Author(s):  
Dmitri V. Konarev ◽  
Maxim A. Faraonov ◽  
Alexey V. Kuzmin ◽  
Salavat S. Khasanov ◽  
Yoshiaki Nakano ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Radical Anion ◽  
Radical Anions ◽  
Metal Phthalocyanine ◽  
Metal Phthalocyanines ◽  
Optical And Magnetic Properties

Radical anion salts of metal phthalocyanines (M = CuII, PbII, VIVO and SnIVCl2) with the {cryptand(Na+)} cations have been obtained and studied.

Radical Anions, Radical‐Anion Salts, and Anionic Complexes of 2,1,3‐Benzochalcogenadiazoles

2018 ◽  
Vol 25 (3) ◽  
pp. 806-816 ◽  
Author(s):  
Nikolay A. Pushkarevsky ◽  
Elena A. Chulanova ◽  
Leonid A. Shundrin ◽  
Anton I. Smolentsev ◽  
Georgy E. Salnikov ◽  
...  
Keyword(s):  
Radical Anion ◽  
Radical Anions ◽  
Anionic Complexes

scholarly journals Persistent radical anion polymers based on naphthalenediimide and a vinylene spacer

RSC Advances ◽  
2018 ◽  
Vol 8 (27) ◽  
pp. 14760-14764 ◽  
Author(s):  
Sashi Debnath ◽  
Connor J. Boyle ◽  
Dongming Zhou ◽  
Bryan M. Wong ◽  
Kevin R. Kittilstved ◽  
...  
Keyword(s):  
Radical Anion ◽  
Design Strategy ◽  
Radical Anions

A design strategy for polymers that can be reduced by up to 4 electrons and have persistent radical anions.

Ionic complex of fullerene C602− dianions with (MDABCO+)2·MnIITPP coordination assemblies: synthesis, crystal structure and magnetic properties

2008 ◽  
Vol 12 (11) ◽  
pp. 1146-1153 ◽  
Author(s):  
Dmitri V. Konarev ◽  
Salavat S. Khasanov ◽  
Gunzi Saito ◽  
Rimma N. Lyubovskaya
Keyword(s):  
High Spin ◽  
Spin State ◽  
Magnetic Measurements ◽  
High Spin State ◽  
Radial Expansion ◽  
Ionic Complex ◽  
Porphyrin Core ◽  
First Time ◽  
Center Distance ◽  
Positively Charged

The crystals of the ionic complex containing fullerene C 602− dianions and positively charged ( MDABCO +)2· Mn II TPP assemblies: {( MDABCO +)2·MnII TPP }·( C 602−)·( C 6 H 4 Cl 2)4·( CH 3 CN )2 (1) were obtained for the first time ( MDABCO +: the cation of N-methyldiazabicyclooctane; TPP: tetraphenylporphyrin). The C 602− dianions are isolated in the complex with the shortest center-to-center distance of 13.228 Å. The Mn II atoms are six-coordinated in the ( MDABCO +)2· Mn II TPP units. The length of the Mn-N(TPP) equatorial bonds of 2.093-2.098(1) Å corresponds to the high-spin state of the Mn II atoms (S = 5/2) which was confirmed by the magnetic measurements (µ eff = 5.61 µ B at 300 K). The Mn II atoms are located exactly in the porphyrin plane and this results in the radial expansion of the porphyrin core. The long (2.537(1)−2.545(1) Å) Mn - N ( MDABCO +) axial bonds indicate essential destabilization of the six-coordinated ( MDABCO +)2· Mn II TPP units due to the population of the d ( z 2) orbital in high-spin state. The contribution from the C 602− dianions was not found in magnetic measurements on the basis of the contribution from high-spin Mn II TPP and most probably they are diamagnetic in the 2-300 K range.

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