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HomeProduct name listCyclopropylacetylene

Cyclopropylacetylene

Synonym(s):Ethynylcyclopropane

  • CAS NO.:6746-94-7
  • Empirical Formula: C5H6
  • Molecular Weight: 66.1
  • MDL number: MFCD02181090
  • EINECS: 425-430-1
  • SAFETY DATA SHEET (SDS)
  • Update Date: 2024-11-19 15:53:33
Cyclopropylacetylene Structural

What is Cyclopropylacetylene?

Preparation

Cyclopropylacetylene was prepared in a two-step procedure by dichlorination of cyclopropyl methyl ketone with phosphorus pentachloride (PCl5) followed by double dehydrohalogenation with a strong base. This sequence presented significant scale-up problems with low overall yields (20-25%).
Similarly, cyclopropylacetylene has been prepared by base-induced dehydrohalogenation of bromovinylcyclopropane . Cyclopropylacetylene has also been prepared from the 1-trimethylsilyl derivative of cyclopropylacetylene, which was prepared by treatment of 5-chloro-1-trimethylsilyl-1-pentyne with lithium diisopropylamide at ?78°C followed by warming to room temperature.

Chemical properties

clear colorless to light yellow liquid

The Uses of Cyclopropylacetylene

Cyclopropylacetylene is used as an organic chemical synthesis intermediate.

Properties of Cyclopropylacetylene

Melting point: 294 °C (decomp)
Boiling point: 79-80 °C
Density  0.7801
refractive index  n20/D 1.4480
Flash point: -5 °F
storage temp.  2-8°C
solubility  Chloroform, Ethyl Acetate
form  Liquid
color  Clear colorless to light yellow
Specific Gravity 0.797
Water Solubility  Slightly soluble in water.
InChI InChI=1S/C5H6/c1-2-5-3-4-5/h1,5H,3-4H2
CAS DataBase Reference 6746-94-7(CAS DataBase Reference)
NIST Chemistry Reference Cyclopropylacetylene(6746-94-7)

Safety information for Cyclopropylacetylene

Signal word Danger
Pictogram(s)
ghs
Flame
Flammables
GHS02
ghs
Corrosion
Corrosives
GHS05
GHS Hazard Statements H225:Flammable liquids
H315:Skin corrosion/irritation
H318:Serious eye damage/eye irritation
H412:Hazardous to the aquatic environment, long-term hazard
Precautionary Statement Codes P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking.
P233:Keep container tightly closed.
P273:Avoid release to the environment.
P280:Wear protective gloves/protective clothing/eye protection/face protection.
P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.
P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

Computed Descriptors for Cyclopropylacetylene

InChIKey NPTDXPDGUHAFKC-UHFFFAOYSA-N
SMILES C1(C#C)CC1

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