Korean Journal of Agricultural Science (농업과학연구)

Institute of Agricultural Science, CNU (충남대학교 농업과학연구소)
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Electrochemical Reduction of 0,0-Dimethyl-0-(3-Methyl-4-Nitrophenyl)-phosphorothioate(Sumithion®) in Acetonitrile Solution

Acetonitrile 용액중(溶液中)에서 0,0-Dimethyl-0-(3-Methyl-4-Nitrophenyl)-phosphorothioate(Sumithion®)의 전기화학적(電氣化學的) 환원반응(還元反應)

  • Park, Seung Heui (Department of Agricultural Chemistry, Coll. of Agriculture, Chungnam Nat'l Univ.) ;
  • Sung, Nack Do (Department of Agricultural Chemistry, Coll. of Agriculture, Chungnam Nat'l Univ.)
  • 박승희 (충남대학교 농과대학 농화학과) ;
  • 성낙도 (충남대학교 농과대학 농화학과)
  • Published : 1984.12.31
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Abstract

The electrochemical reduction of 0,0-dimethyl-0-(3-methyl-4 -nitrophenyl)-phosphorothioate ($Sumithion^{(R)}$) in acetonitrile solution has been studied by direct current (DC), differential pulse (DP) polarography and cyclic voltammetry methods. The irreversible electron-transfer chemical reaction (EC) mechanism of Sumithion proceeds by six electron-transfer to form radical and reduction of three-step which undergoes single bond of the phosphorus atom & phenoxy group by electron-transfer and protonation cleaved to give p-hydroxyamino-m-cresol and dimethylthiophosphonate as major product.

0.1M tetraethylammoniumperchlorate (TEAP)를 지지전해질로 한 acetonitrile속에서 direct current (DC), differential pulse (DP) polarography 및 cyclo voltammetry (CV) 방법에 의한 Sumithion의 전기화학적 환원반응은 -1.0~-2.50volt vs. Ag-AgCl 범위에서, 제1단계로 P-Oph 결합의 분열에 의하여 dimethylthiophosphonyl radical과 p-nitro-m-cresol이 생성되는 1전자 유사가역반응이 일어나고, 제2단계는 전형적인 1전자 비가역 반응으로 dimethylthiophosphonyl radical이 dimethylthiophosphonate가 되며, 제3단계 반응은 2.7volt vs. Ag-AgCl의 높은 음전위에서 p-nitro-m-cresol은 4전자 비가역반응에 의한 nitro group의 환원으로 p-hydroxy-amino-m-cresol이 생성되는 총 3단계의 비가역적인 electron-transfer chemical reaction (EC) 메카니즘으로 전극반응이 진행됨을 알았다.

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