(Z)-Stilbene

Names
IUPAC name cis-1,2-Diphenylethylene
Preferred IUPAC name (Z)-1,2-Diphenylethene
Other names cis-Stilbene
Identifiers
CAS Number	645-49-8 Y
3D model (JSmol)	Interactive image
Beilstein Reference	1616739
ChEBI	CHEBI:36008 Y
ChEMBL	ChEMBL393702 Y
ChemSpider	4512351 Y
ECHA InfoCard	100.010.406
EC Number	211-445-7
Gmelin Reference	4380
PubChem CID	5356785
UNII	TTG5048Y3K Y
CompTox Dashboard (EPA)	DTXSID5026049
InChI InChI=1S/C14H12/c1-3-7-13(8-4-1)11-12-14-9-5-2-6-10-14/h1-12H/b12-11- Y Key: PJANXHGTPQOBST-QXMHVHEDSA-N Y InChI=1/C14H12/c1-3-7-13(8-4-1)11-12-14-9-5-2-6-10-14/h1-12H/b12-11- Key: PJANXHGTPQOBST-QXMHVHEDBW
SMILES c2(\C=C/c1ccccc1)ccccc2
Properties
Chemical formula	C14H12
Molar mass	180.250 g·mol−1
Appearance	Liquid
Melting point	5 to 6 °C (41 to 43 °F; 278 to 279 K)
Boiling point	307 °C (585 °F; 580 K) at 1 atm (82°C to 84°C at 0.4 mmHg)
Solubility in water	Practically insoluble
Hazards[1]
GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H315, H319
Precautionary statements	P264, P280, P302+P352, P305+P351+P338, P321, P332+P313, P337+P313, P362
Safety data sheet (SDS)	Oxford MSDS
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Y verify (what is YN ?) Infobox references

(Z)-Stilbene is a diarylethene, that is, a hydrocarbon consisting of a cis ethene double bond substituted with a phenyl group on both carbon atoms of the double bond. The name stilbene was derived from the Greek word stilbos, which means shining.

Stilbene exists as two possible isomers known as (E)-stilbene and (Z)-stilbene. (Z)-Stilbene is sterically hindered and less stable because the steric interactions force the aromatic rings 43° out-of-plane and prevent conjugation.^[2] (Z)-Stilbene has a melting point of 5–6 °C (41–43 °F), while (E)-stilbene melts around 125 °C (257 °F), illustrating that the two compounds are quite different.

• Stilbene is used in manufacture of dyes and optical brighteners, and also as a phosphor and a scintillator.
• Stilbene is one of the gain mediums used in dye lasers.

• Stilbene will typically have the chemistry of a diarylethene, a conjugated alkene.
• Stilbene can undergo photoisomerization under the influence of UV light.
• Stilbene can undergo stilbene photocyclization, an intramolecular reaction.
• (Z)-Stilbene can undergo electrocyclic reactions.

Many stilbene derivatives (stilbenoids) are present naturally in plants. An example is resveratrol and its cousin, pterostilbene.