Stilbene
Title: Stilbene
CAS Registry Number: 588-59-0
CAS Name: 1,1¢-(1,2-Ethenediyl)bis[benzene]
Additional Names: a,b-diphenylethylene; bibenzal; bibenzylidene
Molecular Formula: C14H12
Molecular Weight: 180.25
Percent Composition: C 93.29%, H 6.71%
Literature References: trans-Form prepd by Clemmensen reduction of benzoin: Shriner, Berger, Org. Synth. coll. vol. III, 786 (1955); cis-form by copper-chromite decarboxylation of a-phenylcinnamic acid: Buckles, Wheeler, ibid. coll. vol. IV, 857 (1963). Synthesis of cis- and trans-forms by the Wittig reaction and by decarboxylation of phenylcinnamic acids: Wheeler, Batlle de Pabon, J. Org. Chem. 30, 1473 (1965).
 
Derivative Type: trans-Form
CAS Registry Number: 103-30-0
Properties: Crystals from 95% ethanol, mp 124°. bp760 306-307°. uv max (95% ethanol): 296, 305 nm (e 28100; 26700). Volatile with steam. Practically insol in water. Sol in 90 parts cold alc, 13 parts boiling alc, freely in benzene, ether.
Melting point: mp 124°
Boiling point: bp760 306-307°
Absorption maximum: uv max (95% ethanol): 296, 305 nm (e 28100; 26700)
 
Derivative Type: cis-Form
CAS Registry Number: 645-49-8
Properties: Liquid, solidifies at -5°. bp10 135°; bp1.0 96°. nD25 1.6188. uv max (95% ethanol): 278 nm (e 10200). Completely sol in cold abs alcohol.
Boiling point: bp10 135°; bp1.0 96°
Index of refraction: nD25 1.6188
Absorption maximum: uv max (95% ethanol): 278 nm (e 10200)

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