Synthesis, electrochemistry, MO properties, and X-ray diffraction structures of the new redox-active diphosphine ligand 2-(2-thienylidene)-4,5-bis(diphenylphosphino)-4-cyclopenten-1,3-dione (tbpcd) and the rhenium compound fac-BrRe(CO)3(tbpcd)

Polyhedron ◽  
2007 ◽  
Vol 26 (14) ◽  
pp. 3577-3584 ◽  
Author(s):  
William H. Watson ◽  
David Wiedenfeld ◽  
Aparna Pingali ◽  
Bhaskar Poola ◽  
Michael G. Richmond
Keyword(s):  
Diphosphine Ligand ◽  
X Ray Diffraction ◽  
X Ray ◽  
Redox Active ◽  
Rhenium Compound

scholarly journals [FeII(L•)2][TCNQF4•−]2: A Redox-Active Double Radical Salt

2019 ◽  
Vol 72 (10) ◽  
pp. 769 ◽  
Author(s):  
Ian A. Gass ◽  
Jinzhen Lu ◽  
Ruchika Ojha ◽  
Mousa Asadi ◽  
David W. Lupton ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Radical Anion ◽  
Electrochemical Studies ◽  
X Ray Diffraction ◽  
Neutral Radical ◽  
X Ray ◽  
Redox Active ◽  
Diffusion Controlled ◽  
Radical Salt ◽  
Radical Ligand

The reaction of [FeII(L•)2][BF4]2 with LiTCNQF4 results in the formation of [FeII(L•)2][TCNQF4•−]2·2CH3CN (1) (L• is the neutral aminoxyl radical ligand 4,4-dimethyl-2,2-di(2-pyridyl)oxazolidine-N-oxide; TCNQF4 is 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane). Single-crystal X-ray diffraction; Raman, Fourier-transform infrared (FTIR) and ultraviolet–visible spectroscopies; and electrochemical studies are all consistent with the presence of a low-spin FeII ion, the neutral radical form (L•) of the ligand, and the radical anion TCNQF4•−. 1 is largely diamagnetic and the electrochemistry shows five well-resolved, diffusion-controlled, reversible one-electron processes.

scholarly journals Complexes of Cobalt(II) Iodide with Pyridine and Redox Active 1,2-Bis(arylimino)acenaphthene: Synthesis, Structure, Electrochemical, and Single Ion Magnet Properties

Molecules ◽  
2020 ◽  
Vol 25 (9) ◽  
pp. 2054 ◽  
Author(s):  
Dmitriy S. Yambulatov ◽  
Stanislav A. Nikolaevskii ◽  
Mikhail A. Kiskin ◽  
Tatiana V. Magdesieva ◽  
Oleg A. Levitskiy ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Cyclic Voltammetry ◽  
External Magnetic Field ◽  
Electrochemical Behavior ◽  
Complex I ◽  
Molecular Structures ◽  
X Ray Diffraction ◽  
X Ray ◽  
Redox Active ◽  
Tetrahedral Environment

Complexes [(dpp-BIAN)0CoIII2]·MeCN (I) and [(Py)2CoI2] (II) were synthesized by the reaction between cobalt(II) iodide and 1,2-bis(2,6-diisopropylphenylimino)acenaphthene (dpp-BIAN) or pyridine (Py), respectively. The molecular structures of the complexes were determined by X-ray diffraction. The Co(II) ions in both compounds are in a distorted tetrahedral environment (CoN2I2). The electrochemical behavior of complex I was studied by cyclic voltammetry. Magnetochemical measurements revealed that when an external magnetic field is applied, both compounds exhibit the properties of field-induced single ion magnets.

scholarly journals Magnesium and Nickel Complexes with Bis(p-iminoquinone) Redox-Active Ligand

2021 ◽  
Vol 47 (5) ◽  
pp. 307-318
Author(s):  
I. N. Meshcheryakova ◽  
O. Yu. Trofimova ◽  
N. O. Druzhkov ◽  
K. I. Pashanova ◽  
I. A. Yakushev ◽  
...  
Keyword(s):  
Solid Phase ◽  
Nickel Complexes ◽  
X Ray Diffraction ◽  
X Ray ◽  
Bridging Ligand ◽  
Redox Active Ligand ◽  
Active Ligand ◽  
Redox Active ◽  
Dimeric Complexes ◽  
Poorly Soluble

Abstract Poorly soluble in the most part of organic solvents dimeric complexes $${\text{M}}{{{\text{g}}}_{{\text{2}}}}{\text{L}}_{2}^{2}$$·4DMF (I) and $${\text{N}}{{{\text{i}}}_{{\text{2}}}}{\text{L}}_{2}^{2}$$·4DMF (II) (L is 4,4'-(1,4-phenylenebis(azanylylidene))bis(3,6-di-tert-butyl-2-hydroxycyclohexa-2,5-dien-1-one dianion)) are synthesized by the reactions of magnesium and nickel acetates with the ditopic redox-active ligand of the hydroxy-para-iminoquinone type in a DMF solution. The molecular and crystal structures of the synthesized compounds are determined by X-ray diffraction analysis (CIF files CCDC nos. 2045665 (I) and 2045666 (II·3DMF)). The thermal stability is studied by thermogravimetry. The redox-active character of the organic bridging ligand in the dimeric complexes $${\text{M}}{{{\text{g}}}_{{\text{2}}}}{\text{L}}_{2}^{2}$$·4DMF and $${\text{N}}{{{\text{i}}}_{{\text{2}}}}{\text{L}}_{2}^{2}$$·4DMF is confirmed by the data of solid-phase electrochemistry.

scholarly journals Formazanate Complexes of Bis-Cyclometalated Iridium

2019 ◽  
Author(s):  
Evanta Kabir ◽  
Ge Mu ◽  
David A. Momtaz ◽  
Noah A. Bryce ◽  
Thomas Teets
Keyword(s):  
Point Group ◽  
Binding Mode ◽  
Group Symmetry ◽  
Binding Modes ◽  
X Ray Diffraction ◽  
Substitution Pattern ◽  
X Ray ◽  
Redox Active ◽  
Symmetric Geometry ◽  
New Compounds

<div>In this work we describe a series of bis-cyclometalated iridium(III) formazanate complexes, expanding the coordination chemistry of the redox-active formazanate class to iridium. A total of 18 new complexes are described, varying the substituent pattern on the formazanate and the identity of the cyclometalating ligand on iridium. Eight of the new compounds are structurally characterized by single-crystal X-ray diffraction, which along with NMR spectroscopy evinces two binding modes of the formazanate. Two of the compounds are isolated in a C2-symmetric geometry where the formazanate is bound in a six-member chelate “closed” conformation, involving the 1- and 5-positions of the 1,2,4,5-tetraazapentadienyl formazanate core. In most of the examples, the major isomer that forms and is exclusively isolated involves the formazanate bound in a five-member chelate “open” form, coordinating through the 1- and 4-positions of the formazanate core and resulting in C1 point-group symmetry. All complexes are characterized by UV-vis absorption spectroscopy and cyclic voltammetry, with these features depending primarily on the substitution pattern on the formazanate, and to a lesser extent on the identity of the cyclometalating ligand and formazanate binding mode.</div>

scholarly journals A novel redox-active calix[4]arene-tetrathiafulvalene dyad

2011 ◽  
Vol 9 (6) ◽  
pp. 1102-1108 ◽  
Author(s):  
Bang-Tun Zhao ◽  
Xiao-Min Zhu ◽  
Qi-Ming Peng ◽  
Zhen-Ning Yan ◽  
Franck Derf ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Diffraction Analysis ◽  
Electrochemical Properties ◽  
Absorption Spectra ◽  
X Ray Diffraction ◽  
X Ray ◽  
Redox Active ◽  
Cesium Fluoride

AbstractA novel redox-active calix[4]arene-TTF 5 was prepared by the reaction of p-tert-butylcalix[4]arene 4 with the tosylated TTF 3 in the presence of cesium fluoride. The structure of the dyad 5 was identified by X-ray diffraction analysis, and the preliminary electrochemical properties of 5 were investigated by cyclic voltammetry (CV), for which two reversible one-electron waves were observed. Moreover, the UV-vis absorption spectra studies show that the dyad 5 undergoes progressive oxidation at the TTF moiety in presence of increasing amounts of Cu2+ or Hg2+.

Sign in / Sign up

Export Citation Format

Share Document