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- W2000262072 abstract "Cyclic voltammograms of gold complexes of bis(diphenylphosphines) were recorded using a gold working electrode. The E½ values vs. a saturated calomel electrode (s.c.e.)(and the peak-to-peak separations) for the PF6 salts of the following complexes were obtained: bis[1,2-bis(diphenylphosphino)benzene]gold(I), 0.463 (37); bis[1,2-bis(diphenylphosphino)ethene]gold(I), 0.572 V (37); bis[1,2-bis(diphenylphosphino)ethane]gold(I), 0.458(30); bis[1,3-bisdiphenylphosphino)propane]gold(I), 0.752 V (35 Mv). The first couple is electrochemically reversible and the last three show quasi-reversibility for the two-electron redox process to form the corresponding gold(III) complex. Spectroelectrochemistry of bis[1,2-bis(diphenylphosphino)benzene]gold(I) revealed only two u.v.-absorbing species in solution, and the limiting spectra are those of the tetrahedral gold(I) complex and the square-planar gold(III) complex. A facile pseudo-rotation between the two geometries is proposed. Cyclic voltammetry of the chloride or bromide salt of bis[1,2-bis(diphenylphosphino)benzene]gold(I) demonstrated that halide ion adds to the gold (III) complex but dissociates from it upon reduction back to the starting gold(I) complex. Based on electrochemical behaviour, the order of increasing lability of the gold(III) complexes is as listed above." @default.
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- W2000262072 date "1990-01-01" @default.
- W2000262072 modified "2023-10-18" @default.
- W2000262072 title "Electrochemical studies of gold(I) and gold(III) complexes of bis(diphenylphosphines)" @default.
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- W2000262072 doi "https://doi.org/10.1039/dt9900002219" @default.
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