22693-18-1

Basic information

• Product Name: 1-cyclopropylcyclobutene
• Synonyms: 1-Cyclopropylcyclobutene; cyclobutene, 1-cyclopropyl-
• CAS NO: 22693-18-1
• Molecular Formula: C₇H₁₀
• Molecular Weight: 94.1543
• Mol File: 22693-18-1.mol
• Article Data: 4

Chemical Properties

• Boiling Point: 110.467°C at 760 mmHg
• Flash Point: 1.563°C
• Density: 1.056g/cm³
• Vapor Pressure: 27.87mmHg at 25°C
• Refractive Index: 1.586
• CAS DataBase Reference: 1-cyclopropylcyclobutene(CAS DataBase Reference)
• NIST Chemistry Reference: 1-cyclopropylcyclobutene(22693-18-1)
• EPA Substance Registry System: 1-cyclopropylcyclobutene(22693-18-1)

Safety Data

• Hazardous Substances Data: 22693-18-1(Hazardous Substances Data)

Upstream product

• 186581-53-3 diazomethane 
• 71153-32-7 spiro<2.3>hex-1-ene 
• 127-18-4 1,1,2,2-tetrachloroethylene 
• 86310-10-3 5,5-dicyclopropyl-2-methoxy-2-methyl-Δ³-1,3,4-oxadiazoline 
• 126063-53-4 C₁₃H₁₅N₂O₂S^(1-)*K⁽¹⁺⁾ 
• 400820-18-0 1-cyclobutyl-1-(p-tolylsulfonyloxy)cyclopropane 

Relevant articles and documents

Cyclobutylidenecyclopropane: New synthesis and use in 1,3-dipolar cycloadditions - A direct route to spirocyclopropane-annulated azepinone derivatives

Cyclobutylidenecyclopropane (7) was prepared in multigram quantities by a new three-step sequence starting from ethyl cyclobutanecarboxylate (4) (39% overall yield). 1,3-Dipolar cycloadditions of phenyl- (9), pyridyl- (10), and the newly prepared (four st

Chemistry of Dicyclopropylcarbene and Related Intermediates in Dimethyl Sulfoxide

The potassium salts of the anions of (phenylsulfonyl)hydrazones of diisopropyl, isopropyl cyclopropyl, and dicyclopropyl ketone were decomposed in dimethyl sulfoxide in the temperature range of 110-130 deg C.The diisopropyl phenylsulfonyl anion decomposes to form 2,4-dimethyl-2-pentene and diisopropyl ketone.Similar decomposition of the isopropyl cyclopropyl substrate forms 1-cyclopropyl-2-methylpropene, 1-isopropylcyclobutene, and isopropyl cyclopropyl ketone, while thermal decomposition of the dicyclopropyl ketone (phenylsulfonyl)-hydrazone anion forms cyclopropylcyclobutene and dicyclopropyl ketone.The rate constants for the first and second steps of the consecutive first-order decomposition of the (phenylsulfonyl)hydrazone anions were determined over the temperature range of 110-130 deg C.The activation parameters ΔH* (kcal/mol), ΔS* (eu), and ΔG* (kcal/mol) were calculated for the diazo compound to carbene step (k2) for the diisopropyl (15.6 +/- 1.1, -30.9 +/- 2.8, and 27.7 +/- 1.6), the isopropyl cyclopropyl (27.7 +/- 2.0, 3.3 +/- 5.1, and 26.4 +/- 2.8), and the dicyclopropyl (36.8 +/- 1.8, 28.4 +/- 4.6, 25.6 +/- 2.5).These results are discussed in terms of two factors: interaction of the cyclopropane ring with the functional group and orientation of the polar solvent.