Results 241 to 250 of about 23,102 (300)
Some of the next articles are maybe not open access.
Organic Letters
The convenient and precise preparation of N,N'-diarylhydrazides, especially from readily available raw materials, remains highly challenging. Here, a photoredox catalytic phosphine-mediated deoxygenative hydroacylation of azobenzenes with abundant and ...
Jingya Yang +5 more
semanticscholar +1 more source
The convenient and precise preparation of N,N'-diarylhydrazides, especially from readily available raw materials, remains highly challenging. Here, a photoredox catalytic phosphine-mediated deoxygenative hydroacylation of azobenzenes with abundant and ...
Jingya Yang +5 more
semanticscholar +1 more source
An Oxidative Approach Enables Efficient Access to Cyclic Azobenzenes.
Journal of the American Chemical Society, 2019Azobenzenes are versatile photoswitches that have found widespread use in a variety of fields, ranging from photo-pharmacology to the material sciences. In addition to regular azobenzenes the cyclic diazocines have recently emerged.
M. Maier +7 more
semanticscholar +1 more source
Enthalpies of formation of cis-azobenzene and trans-azobenzene
The Journal of Chemical Thermodynamics, 1992The standard (p° = 0.1 MPa) molar enthalpy of formation of crystalline trans-azobenzene was determined from its enthalpy of combustion in oxygen at 298.15 K measured by static-bomb calorimetry. The enthalpy of isomerization: ΔisomH°m(cr, cis → trans)/(kJ · mol−1) = -(49.1 ± 1.0), was measured by reaction-solution calorimetry: the isomerization was ...
A.R. Dias +7 more
openaire +1 more source
Site‐Selective C–H Amidation of Azobenzenes with Dioxazolones under Rhodium Catalysis
European Journal of Organic Chemistry, 2016Neeraj Kumar Mishra +2 more
exaly +2 more sources
Electrochemical Cyclization of o-Aminyl Azobenzenes: Roles of Aldehydes in N-N Bond Cleavage.
Organic LettersDirect functionalization of azobenzenes provides an approach to obtaining valuable molecules in synthetic chemistry. However, an efficient method for the cleavage of the N═N bond of azobenzenes, which is a key process for this transformation, is still ...
Anni Li +3 more
semanticscholar +1 more source
Decatungstate-Photocatalyzed Hydroamidomethylation of Azobenzenes with N,N-Dimethylamides.
Organic LettersA photocatalytic hydroamidomethylation of azobenzenes with N,N-dimethylamides has been developed. Using tetrabutylammonium decatungstate (TBADT) as a photocatalyst, an array of azobenzenes and N,N-dimethylamides reacted smoothly under visible light ...
Jingya Yang +6 more
semanticscholar +1 more source
TEMPO catalyzed oxidative dehydrogenation of hydrazobenzenes to azobenzenes.
Organic and biomolecular chemistry, 2020A metal-free direct oxidative dehydrogenation approach for the synthesis of azobenzenes from hydrazobenzenes has been developed by using TEMPO as an organocatalyst for the first time. The reaction proceeded in open air under mild reaction conditions.
Haiping Lv +9 more
semanticscholar +1 more source
Angewandte Chemie, 2019
Modulating controlled radical polymerization is an interesting and important issue. Herein, modulating RAFT polymerization employing photosensitive azobenzenes is achieved.
Huijun Nie +4 more
semanticscholar +1 more source
Modulating controlled radical polymerization is an interesting and important issue. Herein, modulating RAFT polymerization employing photosensitive azobenzenes is achieved.
Huijun Nie +4 more
semanticscholar +1 more source
SPIE Proceedings, 2015
Azobenzene derivatives constitute a group of dyes which have photochromic properties and have been investigated as promising systems for diverse applications in the unconventional optic area, their properties can be moulded with help of light.
Ionica Ionita +5 more
openaire +1 more source
Azobenzene derivatives constitute a group of dyes which have photochromic properties and have been investigated as promising systems for diverse applications in the unconventional optic area, their properties can be moulded with help of light.
Ionica Ionita +5 more
openaire +1 more source
Russian Chemical Bulletin, 1993
Thermolysis of azobenzene in a melt and in solution results in the formation of aniline. The possible directions of the reaction are considered. Comparison of the enthalpies of the reaction proves that the cleavage of a π-bond in the N=N group to form a biradical intermediate is thermodynamically more favorable than that of a C-N π-bond.
M. F. Budyka, M. M. Kantor
openaire +1 more source
Thermolysis of azobenzene in a melt and in solution results in the formation of aniline. The possible directions of the reaction are considered. Comparison of the enthalpies of the reaction proves that the cleavage of a π-bond in the N=N group to form a biradical intermediate is thermodynamically more favorable than that of a C-N π-bond.
M. F. Budyka, M. M. Kantor
openaire +1 more source