73743-43-8

Basic information

• Product Name: C₁₁H₉O₄
• CAS NO: 73743-43-8
• Molecular Weight: 205.19
• Mol File: 73743-43-8.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: C₁₁H₉O₄(CAS DataBase Reference)
• NIST Chemistry Reference: C₁₁H₉O₄(73743-43-8)
• EPA Substance Registry System: C₁₁H₉O₄(73743-43-8)

Safety Data

• Hazardous Substances Data: 73743-43-8(Hazardous Substances Data)

Upstream product

• 17333-74-3 2-methylbenzene diazonium 
• 142-45-0 Acetylenedicarboxylic acid 

Relevant articles and documents

Radical Addition to Alkynes: Electron Spin Resonance Studies of the Formation and Reactions of Vinyl Radicals

The e.s.r. spectra are described of a series of vinyl radicals XRC=CR. (R=CO2H, CO2(1-)) formed by the addition of a variety of alkyl, hydroxyalkyl, and aryl radicals (X) to butynedioic acid and the corresponding dianion.For the reaction between Pri. and HO2CCCO2H, k is estimated as ca. 2*106 dm3 mol-1 s-1.In acid solution the first formed vinyl radicals react with more alkyne to give further vinyl radicals XRC=CR-CR=CR. which, if structurally suited, undergo a 1,5-shift to give pentadienyl radicals.The spectra of the latter .HCO2H from .CH3 and butynedioic acid> indicate there to be considerable twisting around the C(3)-C(4) bonds so that conjugation is reduced compared to that in the fully conjugated unsubstituted pentadienyl radical.