51637-55-9

Basic information

• Product Name: isopropenylketene
• Synonyms: isopropenylketene
• CAS NO: 51637-55-9
• Molecular Weight: 82.102
• Mol File: 51637-55-9.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: isopropenylketene(CAS DataBase Reference)
• NIST Chemistry Reference: isopropenylketene(51637-55-9)
• EPA Substance Registry System: isopropenylketene(51637-55-9)

Safety Data

• Hazardous Substances Data: 51637-55-9(Hazardous Substances Data)

Upstream product

• 34876-10-3 3-methyl-2-butenoic anhydride 
• 2231-66-5 2,2-dimethyl-5-(propan-2-ylidene)-1,3-dioxane-4,6-dione 

Relevant articles and documents

Gasphasen-Reaktionen, 22. Thermische Erzeugung von C4H4O: Vinylketen und Ethylidenketen

Thermal HX elimination from unsatured carboxylic acid derivatives CH3-RC=CH-COX represents another method to generate the short-lived isomers C4H3RO with R = H, CH3 in the gas phase.The temperature-dependent changes of amounts of products in the heated flow system are analyzed by photoelectron spectra: based on MNDO calculations and in accordance with literature data, the vinylketene structure CH2=CR-HC=C=O is assigned to the thermolysis product.The isomeric alkylideneketenes H3C-RC=C=C=O with R = H, CH3 are produced in the 760 K short-path pyrolysis of alkylidenemalonates and rearrange on prolonged residence time in the heating zone into the thermodynamically more stable vinylketene derivatives.