11065-31-9Relevant academic research and scientific papers
Dithizone Adsorption at Metal Electrodes. 2. Raman Spectroelectrochemical Investigation of Effect of Applied Potential at a Silver Electrode
Pemberton, Jeanne E.,Buck, Richard P.
, p. 248 - 262 (1981)
The technique of laser Raman spectroelectrochemistry has been applied to the study of the adsorption of the diphenylthiocarbazone (dithizone) anion and its redox forms at a silver electrode in aqueous alkaline media.Raman spectra of the adsorbed forms of
Chemical and electrochemical oxidation and reduction of dithizone
von Eschwege, Karel G.,Swarts, Jannie C.
experimental part, p. 1727 - 1733 (2010/07/04)
A non-aqueous electrochemical study of dithizone, H2Dz, 1, is compared with the chemical oxidation and reduction profile of this versatile ligand. Chemical oxidation of 1 by I2 initially leads to an isolatable disulfide-bridged species, (HDz)2, 22, but ultimately monomeric dehydrodithizone, Dz, 3, is formed. Electrochemically, in CH2Cl2/0.1 mol dm-3 [N(nBu)4][B(C6F5)4], two oxidation processes are observed for 1. Evidence of the electrochemical formation of the dimer 22 was found, but on a CV timescale the fully oxidized species, 22 oxidized, did not convert to the chemically stable species 3. Regeneration of 1 during an irreversible electrochemical reduction of the electrochemically generated fully oxidized species, 22 oxidized, was detected. Two further one-electron electrochemical irreversible reduction steps were also identified to ultimately generate H3Dz-, 8, one of the synthetic precursors to 1. In contrast, resolution and identification of the electron transfer steps of 1 in both dimethylsulfoxide, DMSO, or in CH2Cl2/0.1 mol dm-3 [N(nBu)4][PF6] were hampered by solvation and ion paring of [PF6]- especially with the oxidized species of 1. A metathesis of water-soluble potassium dithizonate, KHDz, 4b, led to lipophilic [N(nBu)4][HDz], 4c.
Synthesis of 2,3-diaryltetrazole-5-thiones and theoretical studies on atomic charge distributions of 2,3-diphenyltetrazole-5-thione
Jian, Fangfang,Zhao, Pusu,Zhang, Lan,Hou, Yuxia
, p. 8322 - 8326 (2007/10/03)
Four 2,3-diaryltetrazole-5-thiones have been synthesized in high yields using a new synthetic method under mild reaction conditions. Theoretical calculations of the structure, vibrational frequencies, and natural population analysis (NPA) of atomic charge
Preferential solvation and molecular orbital calculation studies of solvatochromic mesoionic 2,3-diaryl-2H-tetrazolium-5-thiolate derivatives
Taha,Kiwan
, p. 502 - 508 (2007/10/03)
Solvent effects on the electronic spectra of some mesoionic 2,3-diaryl-2H-tetrazolium-5-thiolate derivatives were investigated in thirteen pure solvents and eight water-organic solvent mixtures. In pure solvents, the solvatochromic shifts of the mesoionic
Isomers of 3-Methylthio-1,5-diarylformazans and their Interconversion in Solution
Hutton, Alan T.,Irving, Harry M. N. H.
, p. 1117 - 1122 (2007/10/02)
1H and 13C n.m.r. and i.r. spectroscopic studies, including 15N-labelling, on solutions of ArNNC(SR)NNHAr (Ar = Ph, p-, or o-tolyl; R = CH3 or CD3) taken in conjunction with established X-ray crystal structures of pure isomers have made it possible to est
3-Carboxymethylthio-1,5-diphenylformazan: a Potential Terdentate Ligand with Unusual Properties
Hutton, Alan T.,Irving, Harry M. N. H.
, p. 139 - 145 (2007/10/02)
3-Carboxymethylthio-1,5-diphenylformazan (8), prepared by two synthetic routes as a potential terdentate ligand, is a very weak base (pK1= -0.43) and an exceptionally weak acid (pK2= 12.48) which does not yield metal complexes.No car
