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- W2022025247 abstract "N(1)-Alkyl-2(arylazo)imidazoles p-C6H4NNC3H2H N(1)R′, RaaiR′ R′ =Me(2), Et (3);R=H(a), Me(b), OMe(c), Cl(d), NO2(e) yield catonicbis-related with both copper(I) (4,5) and silver(I) (6,7). These were isolated as perchlorate salts and the composition is supported by elemental analyses. The complexes are 1:1 electrolytes in methanol. The NN stretch in copper(I) complexes shows a large shift to lower frequency (ca 1335 cm−1) from the free ligand value (ca 1400 cm−1) due to d(Cu) → π* (RaaiR′) back bonding. This effect is much less pronounced in silver(I) complexes indicating a negligible dπ-π* (RaaiR′) interaction. The complexes show highly resolved symmetrical1H NMR spectra. The copper(I) complexes exhibit intense MLCT transitions in the visible region. In methanol the Cu(RaaiR′)2+ couple has E1/2 ca 0.45V vs SCE at 298 K. The high positive potential may be due to the distortion in the geometry of Cu(RaaiR)2+." @default.
- W2022025247 created "2016-06-24" @default.
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- W2022025247 date "1997-09-01" @default.
- W2022025247 modified "2023-10-16" @default.
- W2022025247 title "Chemistry of azoimidazoles: synthesis, spectral characterization and redox properties ofbis(N(1)-alkyl-2-(arylazo)imidazole) copper (I) and silver(I) complexes" @default.
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- W2022025247 doi "https://doi.org/10.1016/s0277-5387(97)00127-7" @default.
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