2606-99-7

Upstream product

• 7330-85-0 4-tert-Butoxy-2,6-di-tert-butylphenol 
• 3315-32-0 2,4,6-tri-tert-butylphenoxyl 
• 71-43-2 benzene 
• 1975-14-0 2,4,6,2',4',6'-hexa-tert-butyl-4,4'-peroxy-bis-cyclohexa-2,5-dienone 
• 4971-61-3 2,4,6-tri-tert-butyl-4-hydroxy-2,5-cyclohexadienone 
• 2143-67-1 diphenylaminyl radical 
• 52211-69-5 O,O'-bis(1,3,5-tri-tert-butyl-4-oxo-2,5-cyclohexadienyl)-p-benzoquinone dioxime 
• 57435-52-6 [1,4]Benzoquinone bis-[O-(1-tert-butoxy-3,5-di-tert-butyl-4-oxo-cyclohexa-2,5-dienyl)-oxime] 

Downstream Products

• 103325-37-7 4-tert-butoxy-2,6-di-tert-butyl-4-(2,5-di-tert-butyl-4-methoxy-phenoxy)-cyclohexa-2,5-dienone 
• 3315-32-0 2,4,6-tri-tert-butylphenoxyl 
• 7330-85-0 4-tert-Butoxy-2,6-di-tert-butylphenol 
• 114909-11-4 4-tert-butoxy-2,6-di-tert-butyl-4-[2]naphthyloxy-cyclohexa-2,5-dienone 

Relevant academic research and scientific papers

Negative activation energies and compensation effects for the reactions of diarylanimyl radicals with phenols

The temperature dependence of the rate constants of the reaction of 4,4'-disubstituted diphenylaminyl radicals (ArAr'N.) with phenols has been studied by a laser pulse photolysis technique.The linear relationships between activation energies E1 (negative in the majority of cases) and logarithms of pre-exponential factors logA1 have been established.These results coincide with the two-parametric correlations of logk1 with ?+ constants of substituents in phenol and aminyl radicals under isothermal conditions.The reaction rate constants decrease considerably when toluene is used instead of n-decane. - Key words: aminyl radicals, phenols, negative temperature coefficient, isoparametric correlations.

KINETICS AND MECHANISM OF THE THERMAL DISSOCIATION OF O,O'-BIS(1,3,5-TRI-tert-BUTYL-4-OXO-2,5-CYCLOHEXADIENYL)-p-BENZOQUINONE DIOXIME IN SOLUTION

The kinetics and mechanism of the thermal dissociation of O,O'-bis(1,3,5-tri-tert-butyl-4-oxo-2,5-cyclohexadienyl)-p-benzoquinone dioxime (quinol ether) in solutions in nonpolar solvents were investigated.The dissociation of the quinol ether is a reversible two-stage process and involves the formation of an intermediate radical.In relation to the reaction conditions (initial concentration, temperature) the dissociation rate of the quinol ether obeys the kinetic equations ω = keff.c1/2 or ω = k1c.The change in the reaction order is due to the ratio of the rates of dissociation of the intermediate radical and of its reaction with the phenoxyl radical.