Cyclopropane

Cyclopropane is the cycloalkane with the molecular formula (CH2)3, consisting of three methylene groups (CH2) linked to each other to form a triangular ring. The small size of the ring creates substantial ring strain in the structure. Cyclopropane itself is mainly of theoretical interest but many of its derivatives - cyclopropanes - are of commercial or biological significance.

Cyclopropane
Names
Preferred IUPAC name
Cyclopropane
Identifiers
3D model (JSmol)
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard 100.000.771
KEGG
UNII
  • InChI=1S/C3H6/c1-2-3-1/h1-3H2 Y
    Key: LVZWSLJZHVFIQJ-UHFFFAOYSA-N Y
  • InChI=1/C3H6/c1-2-3-1/h1-3H2
    Key: LVZWSLJZHVFIQJ-UHFFFAOYAL
  • C1CC1
Properties
C3H6
Molar mass 42.08 g/mol
Appearance Colorless gas
Odor Sweet
Density 1.879 g/L (1 atm, 0 °C)
Melting point −128 °C (−198 °F; 145 K)
Boiling point −33 °C (−27 °F; 240 K)
Acidity (pKa) ~46
-39.9·10−6 cm3/mol
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 Highly flammable
Asphyxiant
NFPA 704 (fire diamond)
1
4
0
Safety data sheet (SDS) External MSDS
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YN ?)
Infobox references

Cyclopropane was used as a clinical inhalational anesthetic from the 1930s through the 1980s. Its high flammability posed a risk of fire and even explosions in the operating room.

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