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• W2025685980 abstract "Treatment of alpha,omega-dithiols HS(CH(2))(n)()SH, n = 4 or 5, with tris[(triphenylphosphine)aurio]oxonium tetrafluoroborate affords the corresponding S,S,S',S'-tetrakis[(triphenylphosphine)aurio]-alpha,omega-alkanediylbis(sulfonium) bis(tetrafluoroborates) of the type {[(Ph(3)P)Au](2)S(CH(2))(n)()S[Au(PPh(3))](2)}(2+)2BF(4)(-). The crystal structure of the species with n = 5 has been determined by single crystal X-ray diffraction studies. In the lattice the unfolded dications are linked into chains through short double Au-Au contacts between the terminal bifurcated diauriosulfonium centers. The analogous reactions with (racemic) 1,2-dithioglycerol and 1,2,3-trithioglycerol also give tri- and tetranuclear complexes with a varying distribution of the metal atoms over the chalcogen(ium) centers. As again demonstrated in a single crystal X-ray diffraction study, the dications {HOCH(2)HCS[(Ph(3)P)Au](2)CH(2)S[Au(PPh(3))](2)}(2+) of the dithioglycerol compound form only dimers through auriophilicity-determined pairing of the bifurcated ends, while the open ends are shielded by the dangling hydroxyl group. The trinuclear complex of 1,2-dithioglycerol is fluxional in solution; the crystal structure has not been determined but is expected to be similar to that derived for the analogous dithioglycol complex. The tetranuclear, trithioglycerol-based dications of {[(Ph(3)P)Au]SCH(2)CHS[Au(PPh(3))]CH(2)S[Au(PPh(3))](2)}(+)BF(4)(-) are isolated in the lattice and feature an unsymmetrical complexation, which is an extension of the structure of the trinuclear dithioglycol analogue {(CH(2)S)(2)[Au(PPh(3))](3)}(+) with its strong intramolecular Au-Au contacts. A similar structure is proposed for the monocation {CH(2)(CH(2)S)(2)[Au(PPh(3))](3)}(+) obtained from propane-1,3-dithiol. The structures of these cations are also fluxional in solution, however, as shown by variable-temperature NMR studies." @default.
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• W2025685980 date "1996-01-01" @default.
• W2025685980 modified "2023-09-26" @default.
• W2025685980 title "Terminally Bifurcated Tetraaurio-α,ω-bis(sulfonium) Salts as Building Blocks for Auriophilicity-Determined Coordination Polymers" @default.
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• W2025685980 doi "https://doi.org/10.1021/ic9516119" @default.
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