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E)-Stilbene itself is of little value, but it is a precursor to other derivatives used as dyes, optical brighteners, phosphors, and scintillators. [25] Stilbene is one of the gain mediums used in dye lasers. [26] 4,4 ′-diamino-2,2 ′-stilbenedisulfonic acid is a popular optical brightener used in some laundry detergents.
Stilbene may refer to one of the two stereoisomers of 1,2-diphenylethene: -Stilbene (trans isomer) -Stilbene (cis isomer) See also. Stilbenoids, a class of ...
In E-Z isomerization, the thermal equilibrium lies well towards the trans-form because of its lower energy (~15 kJ mol −1 in stilbene). [3] The activation energy for thermal E-Z isomerization is 150–190 kJ mol −1 for stilbene, meaning that temperatures above 200°C are required to isomerize stilbene at a reasonable rate, but most ...
Resveratrol is a biologically important stilbenoid.. Stilbenoids are hydroxylated derivatives of stilbene.They have a C 6 –C 2 –C 6 structure. In biochemical terms, they belong to the family of phenylpropanoids and share most of their biosynthesis pathway with chalcones.
Model of (Z)-stilbene molecule. Diphenylethylene or Diphenylethene may refer to: 1,1-Diphenylethylene; 1,2-Diphenylethylene, or Stilbene (E)-Stilbene (trans-isomer)
Pterostilbene is considered to be a corrosive substance, is dangerous upon exposure to the eyes, and is an environmental toxin, especially to aquatic life. [1] A preliminary study of healthy human subjects given pterostilbene for 6–8 weeks, showed pterostilbene to be safe for human use at dosages up to 250 mg per day, although this study did not assess metabolic effects on the lipid profile.
Suitably substituted stilbenes may undergo irreversible, rearomatizing elimination or [1,n]-shift processes in the absence of an oxidant. Aryl enynes, [4] heteroatomic stilbene derivatives (e.g. amides [5]), and substrates containing a single heteroatom in place of the stilbene double bond [6] also undergo the reaction.
Reaction of benzyl chloride and phenylsodium results in diphenylmethane and (E)-stilbene. Diphenylmethane is the expected product from the substitution of chloride. The formation of stilbene is implicates radical intermediates like those proposed in the Wurtz-Fittig reaction mechanism.