Electrochemistry of aromatic diselenides and ditellurides in aprotic media. Preceding formation of mercury-containing compounds
Abstract The reduction of aromatic diselenides and ditellurides on the mercury electrode in nonaqueous media proceeds quite differently from the reduction of aromatic disulphides. Using various electrochemical techniques, electrochemiluminescence and ICP (Inductively Coupled Plasma) emission spectrometry, it has been proven that in the case of ditellurides and diselenides, a spontaneous chemical pre-reaction with mercury, precedes the electron transfer process. In a heterogeneous reaction a stable, mercury-containing soluble compound is formed. A substance with the formula Hg(ArSe) 2 has been isolated as yellowish crystals and its composition was proven by 1 H, 13 C and 77 Se NMR and Mass Spectroscopy. These formally Hg(II) compounds are reduced in a first, more positive cathodic wave with a consumption of one-third of the electrons involved in the total process. The whole two-step mechanism is discussed on the basis of the present experimental material as well as on earlier findings with analogue sulphur compounds. In the case of diphenyl disulphide, the chemical pre-reaction with mercury electrode was found to be nearly negligible. In coulometric experiments an improved electrolytical cell of own construction was tested and found to be advantageous.
유료 다운로드의 경우 해당 사이트의 정책에 따라 신규 회원가입, 로그인, 유료 구매 등이 필요할 수 있습니다. 해당 사이트에서 발생하는 귀하의 모든 정보활동은 NDSL의 서비스 정책과 무관합니다.
NDSL에서는 해당 원문을 복사서비스하고 있습니다. 위의 원문복사신청 또는 장바구니 담기를 통하여 원문복사서비스 이용이 가능합니다.
- 이 논문과 함께 출판된 논문 + 더보기