88-87-9Relevant articles and documents
Semiquinone-bridged bisdithiazolyl radicals as neutral radical conductors
Yu, Xin,Mailman, Aaron,Lekin, Kristina,Assoud, Abdeljalil,Robertson, Craig M.,Noll, Bruce C.,Campana, Charles F.,Howard, Judith A. K.,Dube, Paul A.,Oakley, Richard T.
, p. 2264 - 2275 (2012)
Semiquinone-bridged bisdithiazolyls 3 represent a new class of resonance-stabilized neutral radical for use in the design of single-component conductive materials. As such, they display electrochemical cell potentials lower than those of related pyridine-bridged bisdithiazolyls, a finding which heralds a reduced on-site Coulomb repulsion U. Crystallographic characterization of the chloro-substituted derivative 3a and its acetonitrile solvate 3a·MeCN, both of which crystallize in the polar orthorhombic space group Pna21, revealed the importance of intermolecular oxygen-to-sulfur (CO...SN) interactions in generating rigid, tightly packed radical π-stacks, including the structural motif found for 3a·MeCN in which radicals in neighboring π-stacks are locked into slipped-ribbon-like arrays. This architecture gives rise to strong intra- and interstack overlap and hence a large electronic bandwidth W. Variable-temperature conductivity measurements on 3a and 3a·MeCN indicated high values of θ(300 K) (>10 -3 S cm-1) with correspondingly low thermal activation energies Eact, reaching 0.11 eV in the case of 3a·MeCN. Overall, the strong performance of these materials as f = 1/ 2 conductors is attributed to a combination of low U and large W. Variable-temperature magnetic susceptibility measurements were performed on both 3a and 3a·MeCN. The unsolvated material 3a orders as a spin-canted antiferromagnet at 8 K, with a canting angle φ = 0.14° and a coercive field Hc = 80 Oe at 2 K.
Visible-Light-Induced Radical Polynitration of Arylboronic Acids: Synthesis of Polynitrophenols
Zhang, Qi,Raveendra Babu, Kaki,Huang, Zhouliang,Song, Jinna,Bi, Xihe
supporting information, p. 2891 - 2896 (2018/06/20)
We report a visible light-assisted one-pot method for the synthesis of polynitrophenols through radical tandem hydroxylation and nitration of arylboronic acids by utilizing copper(II) nitrate tri-nitydrate as the nitro source. This method features mild conditions, a simple procedure, and good functional group tolerance. Compared to conventional methods, this work provides a straightforward approach for the polynitration of aromatic compounds.
Nitration of phenolic compounds by antimony nitrate
Jirandehi, Hassan Fathinejad,Mirzaeian, Marjan
experimental part, p. 284 - 286 (2011/07/08)
Antimony nitrate is new compound to be an efficient nitration reagent in the nitration of phenolic compounds with high yields. This producerworks efficiently onmost of the examples, as a grinding nitration reaction, proceed very fast (~1 min) and thermogenic. Copyright Taylor & Francis Group, LLC.