ChemInform Abstract: STUDY OF THE REDOX PROPERTIES OF COMPOUNDS OF QUINOID STRUCTURE. I. HALIDE DERIVATIVES OF BENZOQUINONE

1977 ◽  
Vol 8 (16) ◽  
pp. no-no
Author(s):  
O. S. KSENZHEK ◽  
S. A. PETROVA ◽  
S. V. OLEINIK ◽  
M. V. KOLODYAZHNYI ◽  
V. Z. MOSKOVSKII
Keyword(s):  
Redox Properties ◽  
Quinoid Structure ◽  
Derivatives Of

Derivatives of 5H-Cyclopenta[2,1-b : 3,4-b']dipyridin-5-one (4,5-Diazafhioren-9-one)

1978 ◽  
Vol 33 (1) ◽  
pp. 80-83 ◽  
Author(s):  
Ian F. Eckhard ◽  
Neil G. Keats ◽  
Lindsay A. Summers
Keyword(s):  
Mass Spectrum ◽  
Redox Properties ◽  
Derivatives Of

Abstract Derivatives of 5H-cyclopenta[2,1-b:3,4-b']-dipyridin-5-one including representatives of the new heterocyclic diquaternary system 4H-7a,9a-diazoniacyclopenta[def ]phenanthrene have been synthesised and the herbicidal and redox properties of the salts studied. The mass spectrum of 5-hydroxy-5-methyl-5H-cyclopenta-[2,1-b: 3,4-b'Jdipyridine is also reported.

scholarly journals SYNTHESIS OF BIOTINYLATED FERROCENE, AND ITS APPLICATION AS A REDOX PROBE FOR ELECTROCHEMICAL IMMUNOSENSOR

2018 ◽  
Vol 54 (2C) ◽  
pp. 441
Author(s):  
Le Huu Quynh Anh
Keyword(s):  
Detection Limit ◽  
13C Nmr ◽  
Differential Pulse ◽  
Electrochemical Immunosensor ◽  
Redox Properties ◽  
Structure Identification ◽  
Redox Probe ◽  
Pulse Voltammetry ◽  
Antigen Interaction ◽  
Derivatives Of

The coupling compound of Biotin (Vitamin H) and redox molecule ferrocene throughcovalent bonding was studied. Synthesis and structure identification of Biotinylated 1 - (- 2-aminoethyl) ferrocene were performed by 1H-NMR, 13C-NMR and MS. The ultimate goal of thispaper is to develop derivatives of ferroceneservingas an electrochemical probe that wouldenhance the performance of immunosensor.An immunosensor based on polypyrrole-streptavidinlayer as platform for immobilization of biotinylatedferrocene and antibodies was developed. Themeasurement of redox signal of ferrocene was analyzed by differential pulse voltammetry(DPV) method and underlined a variation of redox properties upon the antigen interaction. Theintroduction of the redox biotinylatedferrocene into streptavidin-polypyrrole layer affords a goodsensitivity of the biosensor with a detection limit of 0.16 pg.mL-1.

scholarly journals Divalent Cobalt and Copper Coordination Complexes of κ2-N, O-Derivatives of (Z)-1-R-2-(2’-oxazolin-2’-yl)-eth-1-en-1-ates: Structure and Reactivity Patterns

2019 ◽  
Author(s):  
Kathleen L. May ◽  
Sanja Resanović ◽  
Maja W. Chojnacka ◽  
Khrystyna Herasymchuk ◽  
Douglas G. Vaughan ◽  
...  
Keyword(s):  
Solid Phase ◽  
Coordination Complexes ◽  
Redox Properties ◽  
X Ray Diffraction ◽  
X Ray ◽  
Square Planar ◽  
Copper Coordination ◽  
Divalent Cobalt ◽  
Decomposition Behaviour ◽  
Derivatives Of

The synthesis and characterisation of a small library of Co and Cu derivatives (29 examples) incorporating the (Z)-1-R1-2-(4’,4’-R2-2’-oxazolin-2’-yl)-eth-1-en-1-ate (L: R1 = alkyl or aryl; R2 = H or Me) skeleton is described. This work includes six new derivatives of “Tohda’s Ligands”. In the case where R2 = H, solid-state stable Co(II) materials of formula Co(κ2-N,O-L)2 could, in some cases, be obtained following base-induced deprotonation of L+H and treatment with hydrated CoX2 salts. These complexes display redox induced solution decomposition behaviour giving Co(κ2-N,O-L)3 as one isolable product. Stable Cu(II) complexes could only be obtained in the case of for R1 = Ph and R2 = H. In the case of R2 = Me, distorted tetrahedral Co(II) compounds (also Co(κ2-N,O-L)2) are obtained as above (twelve examples). Square planar derivatives of Cu(II), of similar stoichiometry, are likewise isolated (eleven new examples). In contrast to the R2 = H reactions, all of these latter materials were found to be air-stable in solution or the solid phase. In total, 18 complexes have been characterised by single crystal X-ray diffraction. Molecular modelling (PM6(tm) and DFT) are also used to elucidate the molecular properties of selected complexes. Only a single Co complex (R1 = t-butyl and R2 = Me) of the library displays reversible one-electron redox properties.<br>

Redox Properties and Cytotoxicity of Synthetic Isomeric Mitochondriotropic Derivatives of the Natural Polyphenol Quercetin

2011 ◽  
Vol 2011 (28) ◽  
pp. 5577-5586 ◽  
Author(s):  
Andrea Mattarei ◽  
Nicola Sassi ◽  
Christian Durante ◽  
Lucia Biasutto ◽  
Giancarlo Sandonà ◽  
...  
Keyword(s):  
Redox Properties ◽  
Natural Polyphenol ◽  
Derivatives Of

scholarly journals Tin and lead derivatives of a Schiff base – bis(orthoquinone) ligand

1995 ◽  
Vol 73 (7) ◽  
pp. 1213-1222 ◽  
Author(s):  
Bruce R. McGarvey ◽  
Andrzej Ozarowski ◽  
Zhigang Tian ◽  
Dennis G. Tuck
Keyword(s):  
Redox Properties ◽  
Monoclinic Space Group ◽  
Metallic Elements ◽  
Subsequent Reaction ◽  
Orthorhombic Space Group ◽  
Actual Structure ◽  
Triplet Ground State ◽  
Space Group ◽  
Identical Composition ◽  
Derivatives Of

The condensation of two molecules of 3,5-di-tert-butylcatechol (dbc) with ammonia under oxidizing conditions is believed to proceed via a keto-imine radical. Further condensation, and subsequent reaction with tin(II) or lead(II) halides, yields complexes of identical composition, M[dbqdi]2, where dbqdi is 3,5-di-tert-butyl-1,2-quinone-1-(2-hydroxy-3,5-di-tert-butylphenyl)imine anion; this name is used without prejudice as to the actual structure of the ligand. The two compounds differ in crystallographic and magnetic properties, and ESR measurements show that the tin compound has a triplet ground state. Both involve six-coordination of the metal in a distorted environment; tin is in the +IV state, but lead is +II, and there are corresponding differences in the form of the ligand. For SnIV(dbqdi)2, the crystal parameters are orthorhombic, space group C2221, a = 19.597(4), b = 24.375(4), c = 23.755(6) Å, Z = 8, and R = 0.073 for 1405 unique reflections. For PbII(dbqdi)2, monoclinic, space group P21/n, a = 14.56(1), b = 25.967(9), c = 15.13(1) Å, β = 99.81(7)°, Z = 4, R = 0.065 for 4911 unique reflections. The different complexation behaviour is shown to be a consequence of the redox properties of the two metallic elements. Keywords: tin, lead, ESR, coordination chemistry, electron transfer.

The syntheses, structures and redox properties of phosphine-gold(I) and triruthenium-carbonyl cluster derivatives of tolans

2008 ◽  
Vol 361 (6) ◽  
pp. 1646-1658 ◽  
Author(s):  
Wan M. Khairul ◽  
David Albesa-Jové ◽  
Dmitri S. Yufit ◽  
Maha R. Al-Haddad ◽  
Jonathon C. Collings ◽  
...  
Keyword(s):  
Redox Properties ◽  
Carbonyl Cluster ◽  
Derivatives Of
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