Effect of fluorine substitution on stretching vibrations of the azoxy group in azoxybenzenes
作者:I.K. Korobeinicheva、O.M. Fugaeva、G.G. Furin
DOI:10.1016/s0022-1139(00)81609-7
日期:1988.6
calculated frequencies and forms of normal vibrations of compound (I) in the valence force field, the vibration spectrum has been interpreted. The presence and number of fluorine atoms in the phenyl fragments of azoxybenzenes have practically no effect on the stretching frequencies of the azoxy group but considerably decrease the band intensity of vibrations of the azoxy and phenyl groups in the Raman
Thermal- and photo-induced transformations of N-aryl-N-nitrosohydroxylamine ammonium salts to azoxy compounds
作者:Jih Ru Hwu、Chii Shyang Yau、Shwu-Chen Tsay、Tong-Ing Ho
DOI:10.1016/s0040-4039(97)10405-1
日期:1997.12
Heating of an ethanolic solution containing N-aryl-N-nitrosohydroxylamine ammonium salts at 78 degrees C produced the desired azoxy compounds in 80-93% yields. Furthermore, irradiation with UV light (lambda greater than or equal to 300 nm) of ethanolic solutions of those ammonium salts at room temperature also provided the desired story compounds in 51-72% yields. (C) 1997 Elsevier Science Ltd.
Vibrational spectra of fluorine-containing azoxybenzenes
作者:I. K. Korobeinicheva、O. M. Fugaeva、G. G. Furin
DOI:10.1007/bf00954808
日期:1986.7
Nb<sub>2</sub>O<sub>5</sub> supported on mixed oxides catalyzed oxidative and photochemical conversion of anilines to azoxybenzenes
作者:Gustavo Senra Gonçalves De Carvalho、Luciano Honorato Chagas、Carla Grijó Fonseca、Pedro Pôssa de Castro、Antônio Carlos Sant’Ana、Alexandre Amaral Leitão、Giovanni Wilson Amarante
DOI:10.1039/c9nj00625g
日期:——
The synthesis of novel supported niobium oxide catalysts and their application for aniline conversion to azoxybenzenes is described. The catalysts were successfully prepared by thermaldecomposition of layered double hydroxides (LDHs), containing M2+ (M = Mg2+ and/or Zn2+) and Al3+ as layer cations, followed by niobium oxide incorporation employing the wetness impregnation method. These catalysts were