✦ LIBER ✦

The effects of substitution on the eletrochemical reduction of dihydroxynaphtacenequinone in N,N-dimethylformamide

✍ Scribed by Chia-Yu Li; Myron L. Caspar; Donald W. Dixon Jr.

Publisher: Elsevier Science
Year: 1980
Tongue: English
Weight: 765 KB
Volume: 25
Category: Article
ISSN: 0013-4686
DOI: 10.1016/0013-4686(80)87110-6

No coin nor oath required. For personal study only.

✦ Synopsis

Abstrmct -The electrochemical reduction of 6,11-dihydroxy-5,12-naphthacenequinone (DHNQ) in N,Ndimethylformamide was investigated. Under polarographic conditions, DHNQ behaves like a simple aromatic quinone with reduction occurring in two successive one-electron steps followed by protonation in the aprotic system and a single two-electron irreversible step in the protic medium. The substituent inductive effects in several DHNQ derivatives were noted. The electron withdrawing groups, chloro and phenylsulfonyl, enhance the oxidation potentials, and the electron-releasing groups, methyl and methoxy, make the reduction more difficult. The strength of the substituents follows the order: C,H,S02 > Cl r CH, z CH .O. A linear Hammett relationshin exists in this series when the averaged value of umctu and c~,__ are used as substitution constants.

📜 SIMILAR VOLUMES

The effects of substitution on the elect

The effects of substitution on the electrochemical reduction of naphthacenetetrone in N,N-Dimethylformamide

✍ Chai-Yu Li; Frederic W. Whitehurst 📂 Article 📅 1982 🏛 Elsevier Science 🌐 English ⚖ 411 KB

The polarographic reduction of 5, 6, 11, 12-naphthacenetetrone (NT) and several of its chloro, methyl, and nitro derivatives were investigated . The electrochemical behavior of NT was compared with 6,11-dihydroxy-5,12-naphthacenequinone (DHNQ) previously studied . Like DHNQ, NT exhibits two reductio

“The effects of substitution on the elec

“The effects of substitution on the electrochemical reduction of naphthacenete- trone in N,N-dimethylformamide,” 27(5), pp. 601-606 (1982).

📂 Article 📅 1982 🏛 Elsevier Science 🌐 English ⚖ 34 KB

ERRATA H. Vogt, "A hydrodynamic model for the ohmic interelectrode resistance of cells with vertical gas evolving electrodes," 26(9), pp. I3 1 l-13 I7 (198 I).

Effect of benzoic acid on the cathodic r

Effect of benzoic acid on the cathodic reduction of aromatic nitro compounds in N,N-dimethylformamide

✍ Barbara Kwiatek; Marek K. Kalinowski 📂 Article 📅 1990 🏛 Elsevier Science 🌐 English ⚖ 408 KB

The effect of benzoic acid on the polarographic reduction of two series of aromatic nitro compounds in NJ-dimethylformamide has been investigated. The first reaction series was p-X-C,H,-NO, compounds, whereas the second one comprised mononitroarenes. In the presence of the acid a new cathodic wave

The Role of Potassium Carbonate in the A

The Role of Potassium Carbonate in the Aromatic Nucleophilic Substitution of Halogen by N-Nucleophile in N,N-Dimethylformamide.

✍ R. S. Begunov; O. V. Taranova; V. Yu. Orlov 📂 Article 📅 2003 🏛 John Wiley and Sons ⚖ 91 KB 👁 2 views

Effect of addition of surfactants on the

Effect of addition of surfactants on the rheology of gels from methylcellulose in N,N-dimethylformamide

✍ Patit P. Kundu; Ratan Pal Singh 📂 Article 📅 2008 🏛 John Wiley and Sons 🌐 English ⚖ 222 KB 👁 1 views

Electrochemistry of the biliverdin—bilir

Electrochemistry of the biliverdin—bilirubin system in N,N-dimethylformamide

✍ Paolo Longhi; Paolo Manitto; Diego Monti; Torquato Mussini; Sandra Rondinini 📂 Article 📅 1981 🏛 Elsevier Science 🌐 English ⚖ 305 KB

The electrochemical behaviour of biliverdin and bilirubin on platinum electrodes in N, Ndimethylformamide has been investigated hy means of voltammetric as well as controlled-potential electrolysis techniques. Bilirubin can be oxidized to biliverdin and the latter, in turn, to further oxidation prod