1435-68-3Relevant articles and documents
Activation volumes for: Cis -to- trans isomerisation reactions of azophenols: A clear mechanistic indicator?
Garcia-Amorós, Jaume,Stopa, Grzegorz,Stochel, Grazyna,Van Eldik, Rudi,Martínez, Manuel,Velasco, Dolores
, p. 1286 - 1292 (2018/01/17)
The thermal cis-to-trans isomerisation reaction of a series of hydroxy-substituted azo derivatives was studied kinetico-mechanistically as a function of temperature and pressure in order to investigate the possible role of the solvent in controlling the isomerisation mechanism, viz. inversion versus rotation. The variation of the observed first order rate constants for kinetic runs carried out at different temperatures and pressures was used to determine the thermal activation parameters ΔH? and ΔS?, and the pressure activation parameter ΔV?. In addition, some experiments with deuterated species or solvents were also performed. The reported results could be interpreted as indicative of a changeover from an inversion mechanism for non-polar solvents to a rotational mechanism for polar solvents, capable of hydrogen bonding, for some of the systems studied. However, the operation of a rotational mechanism in all studied cases can account more consistently for the data observed.
Photo-driven optical oscillators in the kHz range based on push-pull hydroxyazopyridines
Garcia-Amoros, Jaume,Nonell, Santi,Velasco, Dolores
experimental part, p. 4022 - 4024 (2011/06/25)
Push-pull azophenols are valuable target molecules for stable photo-driven optical oscillators. Hydroxyazopyridinium methyl iodide salts show oscillation frequencies up to 10 kHz with no signs of fatigue upon continuous work. The Royal Society of Chemistry.
Substituent Effects on Stability of Complexes of Iron(III), Cobalt(II), Nickel(II) and Copper(II) with Azocresols
Masoud, Mamdouh S.,Elnahas, H. M.,Khalil, E. A.
, p. 347 - 348 (2007/10/02)
The complex formation between substituted azocresols and iron(III), cobalt(II), nickel(II) and copper(II) have been studied potentiometrically in 50percent (v/v) aq ethanol at 25 deg C and μ=0.1.The stability constants of the complexes follow Irving-Willi