Synthesis of nitrobenzene radical anion in a matrix and its IR absorption spectrum

Syntheses, Spectroelectrochemical Studies, and Molecular and Electronic Structures of Ferrocenyl Ene-diynes

“…As shown in Figure , the reduction of the nitro group induces a shift of the ν(NO 2 ) band at 1343 cm –1 to 1360 cm –1 and a decay of ν(NO 2 ) at 1520 cm –1 . Similar observations have been reported in comparisons of the IR spectra of nitrobenzene and its radical anion . The ν(CC) aryl absorptions at 1491 and 1594 cm –1 are very weak in the reduced species, while the ν(CC) vinyl and ν(CC) bands maintain the relatively high intensity (Table ).…”

“…Similar observations have been reported in comparisons of the IR spectra of nitrobenzene and its radical anion. 26 The ν(C=C) aryl absorption at 1491 and 1594 cm -1 is very weak in the reduced species while the ν(C=C) vinyl and ν(C≡C) bands maintain the relatively high intensity ( Table 1). The spectral changes reveal a very small shift of the ν(C=C) vinyl band at 1565 to 1570 cm -1 and a more significant low-energy shift of the ν(C≡C) absorption, with the band envelope between 2211 and 2195 cm -1 being replaced by a single broad band 2152 cm -1 .…”

“…Similar observations have been reported in comparisons of the IR spectra of nitrobenzene and its radical anion. 26 The ν(CC) aryl absorptions at 1491 and 1594 cm −1 are very weak in the reduced species, while the ν(CC) vinyl and ν(CC) bands maintain the relatively high intensity (Table 1). The spectral changes reveal a very small shift of the In contrast to the nitrophenylene reduction, the reversible ferrocenyl-based oxidation of 3d does not affect ν(C=C) vinyl or ν(CC) wavenumbers significantly, resulting in blue shifts smaller than 5 cm −1 , but with a substantial loss of intensity of these bands (Figure 7).…”

Infrared Spectrum of Nitrobenzene Anion in Solid Argon

“…The reduction processes proceed with the initial formation of a nitrobenzene anion radical, which has been extensively studied. [1][2][3][4][5][6][7][8][9][10] The nitrobenzene anion radical has been prepared via the reactions of neutral nitrobenzene with alkaline metals in crystals. [1][2][3] The infrared spectrum of the crystalline radical anion has been measured.…”

“…[1][2][3][4][5][6][7][8][9][10] The nitrobenzene anion radical has been prepared via the reactions of neutral nitrobenzene with alkaline metals in crystals. [1][2][3] The infrared spectrum of the crystalline radical anion has been measured. 3 The radical anion has also been produced by electrolytic reduction of nitrobenzene in various salts and solutions, and its electron spin resonance spectra were reported.…”