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• W2090109526 abstract "Abstract Reaction of L {L = [24]aneS8, [28]aneS8} with two molar equivalents of [Cu(NCMe)4]X (X− = ClO4−, BF4−, PF6−) in MeCN affords the white binuclear copper(I) complexes [Cu2(L)]2+. A single crystal X-ray structure determination of [CU2([24]aneS8)](BF4)2 shows two tetrahedral copper(I) centres, each of which is coordinated to four thioether sulphur-donors, CuS(1) = 2.263(3), CuS(4) = 2.363(3), CuS(7) = 2.349(3), CuS(10) = 2.261(3) A. The Cu … Cu distance is 5.172(3) A. A single crystal X-ray structure determination Of [CU2([28]aneS8)](ClO4)2 shows that this complex also contain two tetrahedral copper(I) centres, each coordinated to four thioether sulphur-donors, CuS(1) = 2.278(5), CuS(4) = 2.333(5), CuS(8) = 2.328(5), CUS(11) = 2.268(5) A. The Cu … Cu distance of 6.454(3) A is greater than in [CU2([24]aneS8)]2+ , reflecting the greater cavity size in [CU2([28]aneS8)]2+. Cyclic voltammetry of [CU2([24]aneS8)]2+ and [CU2([28]aneS8)]2+ at platinum electrodes in MeCN (0.1 M nBU4NPF6) shows irreversible oxidations at Epa, = +0.88 V, +0.92 V vs Fc/Fc+, respectively, at a scan rate of 200 mV s−1. Coulometric measurements in MeCN confirm these oxidations to be two-electron (one electron per copper) processes to give binuclear copper(II) species. Oxidation of the binuclear copper(I) precursors with H2SO4 or HNO3 affords ESR-active copper(II) species which presumably incorporate SO42− and NO3− bridges." @default.
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• W2090109526 title "Copper thioether chemistry: Synthesis and X-ray crystal structures of binuclear copper(I) complexes [Cu2(L)]2+ {L = [24]aneS8, [28]aneS8} incorporating octathia macrocycles" @default.
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• W2090109526 doi "https://doi.org/10.1016/s0277-5387(00)84200-x" @default.
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