57220-84-5

Basic information

• Product Name: Cyclobutane, 1,2-diethynyl-1,2-dimethyl-, cis- (9CI)
• Synonyms: Cyclobutane, 1,2-diethynyl-1,2-dimethyl-, cis- (9CI)
• CAS NO: 57220-84-5
• Molecular Formula: C10H12
• Molecular Weight: 132.20228
• Mol File: 57220-84-5.mol
• Article Data: 1

Chemical Properties

• Appearance: /
• CAS DataBase Reference: Cyclobutane, 1,2-diethynyl-1,2-dimethyl-, cis- (9CI)(CAS DataBase Reference)
• NIST Chemistry Reference: Cyclobutane, 1,2-diethynyl-1,2-dimethyl-, cis- (9CI)(57220-84-5)
• EPA Substance Registry System: Cyclobutane, 1,2-diethynyl-1,2-dimethyl-, cis- (9CI)(57220-84-5)

Safety Data

• Hazardous Substances Data: 57220-84-5(Hazardous Substances Data)

Upstream product

• 78-80-8 2-methylbut-1-en-3-yne 

Relevant articles and documents

Alkine und Cumulene, XV. Ueber die Photodimerisierung konjugierter Enine

On irradiation in the presence of triplet sensitizers having a triplet energy >250 KJ/mol, vinylacetylene (1a) dimerizes to cis- and trans-1,2-diethynylcyclobutane (cis- and trans-2) as well as minor amounts of 4-ethynyl-1-vinylcyclobutene (3).The effect of substituents on the course of the reaction is investigated: whereas alkyl, vinyl, and phenyl substituents, respectively, in the 4-position of 1a do not influence the photoaddition, 2-substituted enynes yield the corresponding cyclobutanes in poor yields only.Finally, 1-substituted vinylacetylenes (besides the substituents mentioned above the influence of ethynyl, chloro, and methoxy groups has been investigated) do not provide photodimers; they are cis-trans-isomerized instead.The mechanism of the photoaddition is discussed.