Duynstee,E.F.J. et al., Recueil des Travaux Chimiques des Pays-Bas, 1973, vol. 92, p. 698 - 700
作者:Duynstee,E.F.J. et al.
DOI:——
日期:——
Visible-light-induced photochemistry of 2,3-dimethyl-2-butene.N2O4 charge-transfer complexes in solid inert matrixes at 75 K
作者:Fritz Blatter、Heinz Frei
DOI:10.1021/j100108a013
日期:1993.2
Continuous-wave laser-induced photochemistry of 2,3-dimethyl-2-butene (DMB).s-N2O4 complexes embedded in solid CO2 and solid Xe at 75 K was observed at wavelengths as long as 488 nm (s: symmetric form (O2N-NO2)). The chemistry was monitored by Fourier transform infrared and UV-visible spectroscopy. Products identified by N-15 and O-18 isotope substitution were 2,3-dimethyl-3-nitroso-2-butyl nitrate (major), 2,3-dimethyl-3-nitro-2-butyl nitrite, and a-N2O3 (both minor). A mechanism is proposed that is distinct from that previously suggested for thermal alkene + N2O4 chemistry in solution and liquid N2O4. UV-visible spectra of DMB.s-N2O4, 2-methyl-2-butene.s-N2O4, and trans-2-butene.s-N2O4 complexes in solid CO2 revealed intense new absorptions with maxima at 360, 338, and 296 nm, respectively. These are assigned to charge-transfer transitions. The DMB.s-N2O4 charge-transfer band extends to 550 nm and is responsible for the observed photochemistry.