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Citation: Ding Tingzhen, Ulrich Koelle. ELECTROCHEMICAL REDUCTION OF h⁵-CYCLOPENTADIENYL-h⁴-CYCLOBUTADIENE-NICKEL-CATIONS, Ni(h⁵-C₅R₅)(h⁴-C₄R₄′)⁺[J]. Acta Physico-Chimica Sinica, ;1985, 1(03): 232-238. doi: 10.3866/PKU.WHXB19850307 shu

ELECTROCHEMICAL REDUCTION OF h⁵-CYCLOPENTADIENYL-h⁴-CYCLOBUTADIENE-NICKEL-CATIONS, Ni(h⁵-C₅R₅)(h⁴-C₄R₄′)⁺

1.
Department of Chemistry and Chemical Engineering, Tsinghua University, Beijing; Institut fuur Anorganische Chemie der Technischen Hochschule Aachen

Received Date: 25 September 1984
Available Online: 15 June 1985

Electrochemical reduction of nickel sandwich complex-cations Ni(h~5-C_5eR_5) (h~4-C_4R'_4)~+, where R=H, CH_3; R'=CH_3, C_6H_5 was investigated at a Pt-electrode by means of cyclic voltametry, chronopotentiometry and chronoamperometry in dichloromethane, acetonitrile, tetrahydrofuran and propylenecarbonate (PC). The reduction are reversible and single electron processes for the compounds with R=H, R'=C_6H_5; R=CH_3, R'=C_6H_5 and the products are characteristic of “19-electron” nickel complexes. The complex cations exhibit an irreversible processes with coupled chemical reaction when R=H, R′=CH_3; R=CH_3, R′=CH_3. The stability of the reduction products was investigated further by bulk electrolysis. The reversibility of the electrochemical reduction tend to be reduced in THF.
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ELECTROCHEMICAL REDUCTION OF h5-CYCLOPENTADIENYL-h4-CYCLOBUTADIENE-NICKEL-CATIONS, Ni(h5-C5R5)(h4-C4R4′)+

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ELECTROCHEMICAL REDUCTION OF h⁵-CYCLOPENTADIENYL-h⁴-CYCLOBUTADIENE-NICKEL-CATIONS, Ni(h⁵-C₅R₅)(h⁴-C₄R₄′)⁺