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• W2030834340 abstract "Reaction of [ReNCl2(PPh3)2] and [ReO2(PPh3)2I] with a variety of phosphines and arsines, L, yielded the respective complex cations [ReNL2Cl]+ and trans-[ReO2L2]+. The X-ray crystal structures of [ReN(dpae)2Cl]+ and trans-[ReO2(dadpe)2]+[dpae = 1,2-bis(diphenylarsino)ethane, dadpe = 1-diphenylarsino-2-diphenylphosphinoethane] have been determined: [ReN(dpae)2Cl]+, monoclinic, space group Cc, a= 10.362(2), b= 22.823(5), c= 21.363(6)Å, β= 92.74(2)°, Z= 4; trans-[ReO2(dadpe)2]+, monoclinic, space group Cc, a= 9.868(3), b= 22.608(5), c= 21.887(8)Å, β= 91.87(3)°, Z= 4. A ReN distance of 1.839(8) and ReO distances of 1.785(8) and 1.766(8)Å have been measured. The [ReNL2Cl]+ and trans-[ReO2L2]+ complexes exhibit intense ν(ReN) and νasym(ReO2) stretches at 1043–1049 and 785–790 cm–1, respectively. Excitation of solid samples of [ReNL2Cl]ClO4 and trans-[ReO2L2]ClO4 at 350–380 nm at room temperature results in yellow-green and orange emission, respectively. Both [ReN(dppbz)2Cl]+ and [ReN(R-1,2-dppp)2Cl]+[dppbz = 1,2-bis(diphenylphosphine)benzene, R-1,2-dppp =R-1,2-bis(diphenylphosphino)propane] exhibit intense long-lived room-temperature luminescence in fluid solutions. Concentration quenching has been observed for both [ReN(dppbz)2Cl]+ and [ReN(R-1,2-dppp)2Cl]+ in MeCN (0.1 mol dm–3 NBu4PF6) with self-quenching rate constants of ca. 5.7 × 107 and 3.2 × 108 dm3 mol–1 s–1, respectively, and inherent lifetimes of ca. 15 and 0.9 µs at infinite dilution. All the trans-[ReO2L2]+ complexes exhibit room-temperature luminescence in MeCN. Cyclic voltammetric studies show that the [ReNL2Cl]+ complexes display an irreversible reduction couple at Epc of ca.–2.1 to –2.4 and an irreversible oxidation couple at Epa of ca.+1.4 to +1.7 V vs. ferrocene–ferrocenium in MeCN (0.1 mol dm–3 NBu4PF6). Irreversible reduction and oxidation couples are also observed for the trans-[ReO2L2]+ species. A direct comparison of the photophysical and spectroscopic properties of [ReNL2Cl]+ and trans-[ReO2L2]+ has been made." @default.
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• W2030834340 date "1992-01-01" @default.
• W2030834340 modified "2023-09-23" @default.
• W2030834340 title "Syntheses, spectroscopy and X-ray crystal structures of luminescent nitrido- and trans-dioxo-rhenium(V) complexes of phosphines and arsines" @default.
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• W2030834340 doi "https://doi.org/10.1039/dt9920001717" @default.
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