2-Butyne

• Catalog No.: A13823
• CAS Number: 503-17-3
• M. F.: C4H6
• M. W.: 54.09044
• Purity: 98%

SYNONYMS

• Title: 2-丁炔
• IUPAC name: but-2-yne
• IUPAC Traditional name: 2-butyne
• Synonyms: Dimethylacetylene

DATABASE IDS

• EC Number: 207-962-2
• MDL Number: MFCD00009275
• Beilstein Number: 1361340
• CAS Number: 503-17-3

PROPERTIES

• Purity: 98%
• Boiling Point: 24-27°C
• Density: 0.690
• Flash Point: -49°C(-56°F)
• Melting Point: -32°C
• Refractive Index: 1.3920
• Risk Statements: 12-36/37/38
• Safety Statements: 3-9-16-26-29-33-37
• TSCA Listed: 是
• Hazard Class: 3
• UN Number: UN3295
• Packing Group: I
• GHS Hazard statements: H224-H315-H319-H335
• European Hazard Symbols: Irritant (Xi)
• European Hazard Symbols: Highly flammable (F+)
• GHS Precautionary statements: P210-P241-P303+P361+P353-P305+P351+P338-P405-P501A

REFERENCES

• Reacts with chlorine to give 3,4-dichloro,1,2,3,4-tetramethylcyclobutene, a precursor of various cyclobutadienyl complexes: Org. Synth. Coll., 5, 370 (1973).
• With AlCl₃, dimerizes to give the complex of the otherwise unstable tetramethylcyclobutadiene, cycloaddition of which with dimethyl acetylenedicarboxylate gives a Dewar benzene: Synthesis, 139 (1971):
  
• With a catalytic amount of AlCl₃, hexamethyl Dewar benzene can be produced directly, with the 2-butyne also acting as the dienophile component: Org. Synth. Coll., 7, 256 (1990).
• For use in formation of a Zr metallocycle as an intermediate in the formation of phospholes and analogous heterocycles, see Bis(cyclopentadienyl)zirconium dichloride, 12548.