Diphenylacetylene Chemical Properties

Melting point:

59-61 °C (lit.)

Boiling point:

170 °C/19 mmHg (lit.)

Density 

0.99 g/mL at 25 °C (lit.)

refractive index 

1.6415 (estimate)

Flash point:

170°C/19mm

storage temp. 

Sealed in dry,2-8°C

form 

Crystalline Powder and Chunks

color 

Light yellow to brownish

Specific Gravity

0.99

Water Solubility 

Miscible with ether and hot alcohol. Immiscible with water.

Merck 

14,9504

BRN 

606478

Stability:

Stable. Combustible. Incompatible with strong oxidizing agents.

InChIKey

JRXXLCKWQFKACW-UHFFFAOYSA-N

CAS DataBase Reference

501-65-5(CAS DataBase Reference)

NIST Chemistry Reference

Diphenylethyne(501-65-5)

EPA Substance Registry System

Benzene, 1,1'-(1,2-ethynediyl)bis- (501-65-5)

Safety Information

Safety Statements 

24/25-22

WGK Germany 

3

TSCA 

Yes

HS Code 

29029090

MSDS

• Language:English Provider:SigmaAldrich
• Language:English Provider:ACROS
• Language:English Provider:ALFA

Diphenylacetylene Usage And Synthesis

Chemical Properties

white crystals

Uses

Organic synthesis, purified grade, primary fluor or wavelength shifter in soluble scintillators.

Uses

Diphenylacetylene is often used as a building block in organic and organometallic chemistry. It acts as dienophile and under goes Diels-Alder reaction with tetraphenylcyclopentadienone to prepare hexaphenylbenzene. It acts as a precursor in the preparation of 3-alkoxycyclopropene by reacting with benzal chloride in the presence of potassium t-butoxide.

Definition

ChEBI: An arylacetylene that is acetylene in which the hydrogens are replaced by phenyl groups.

Synthesis Reference(s)

Canadian Journal of Chemistry, 61, p. 86, 1983 DOI: 10.1139/v83-015
Journal of the American Chemical Society, 87, p. 863, 1965 DOI: 10.1021/ja01082a029
The Journal of Organic Chemistry, 51, p. 3830, 1986 DOI: 10.1021/jo00370a016

Purification Methods

Crystallise tolan from EtOH. [Beilstein 5 H 656, 5 IV 2276.]

Diphenylacetylene(501-65-5)Related Product Information

• o-Phenylenediamine
• p-Phenylenediamine
• tert-Butylchlorodiphenylsilane
• ETHYNYLFERROCENE
• Benzophenone
• 1,3-Diphenyl-2-thiourea
• Diphenyl ether
• Diphenylmethane
• polyphenylacetylene
• Dichlorodiphenylsilane
• Diphenylsilane
• Chlorodiphenylphosphine
• Diphenylphosphine
• Bis(2-ethylhexyl) phthalate
• Diphenyldimethoxysilane
• Phthalic acid
• Phenylacetylene
• Isophthalic acid