72241-20-4

Upstream product

• 2669-89-8 vinyl radical 
• 201230-82-2 carbon monoxide 
• 4599-48-8 allylperoxyl radical 
• 79-10-7 acrylic acid 

Relevant academic research and scientific papers

IR spectroscopic study of allylperoxy radical and products of its phototransformations in the Ar matrix

Matrix IR spectra of an allylperoxy radical (1) obtained by co-condensation of allyl radicals and molecular oxygen into an argon matrix at 12 K have been studied. The bands observed in the matrix IR spectrum are assigned to normal vibrations on the basis of ab initio calculations of radical 1 and its isotope-substituted analog C3H518O2 (1a). The band at 1128.6 cm-1 is assigned to the stretching vibration of the O-O bond. The products of photodecomposition of radical 1 under UV irradiation (λ > 248 nm) have been studied. A vinylacyl radical (2) with a characteristic high vibrational v(C=O) frequency of 1823.1 cm-1 has been observed among the products of photolysis of 1. According to the data of quantum chemical calculations, some delocalization of a free electron between an oxygen atom and two C atoms is observed in radical 2.

Products of the ultraviolet photodissociation of trifluoroacetic acid and acrylic acid

The photodissociation of trifluoroacetic and acrylic acids by the ultraviolet light from a flashlamp has been investigated by measuring the relative yields of some of the major products by time-resolved infrared absorption using tunable, narrow band diode lasers. Yields of CO2 were measured both in the absence and presence of added O2. The former experiments measure the CO2 produced directly by decarboxylation of the acid, channel (2) below, the latter the sum of the yields from channels (1) and (2) since HOCO is rapidly converted to CO2. The yields of CO from the decarbonylation channel (3) have also been measured. For trifluoroacetic acid, the relative yields are found to be [HOCO]: [CO2]: [CO] = (0.28 ± 0.07): (0.61 ± 0.09): (0.11 ± 0.06) and, for acrylic acid, [HOCO]: [CO2]: [CO] = (0.32 ± 0.08): (0.37 ± 0.08) :(0.31 ± 0.09). The results are discussed in relation to the other, limited, measurements on the photodissociation of these acids and whether these three processes are likely to occur independently of one another.

Recurring Chains Following Addition of Atomic Hydrogen to Acetylene

The C2H3 radical was prepared by attachment of H atoms to C2H2.Complex chain reactions ensue: C2H3 + H2 -> C2H4 + H; C2H3 + C2H2 -> C4H5; C4H5 + H2 -> C4H6 (1,3-butadiene) + H; C4H5 + C2H2 -> C6H6 + H (cis addition); C4H5 + C2H2 -> C6H7 (trans addition); C6H7 + H2 -> C6H8 (trans-1,3,5-hexatriene) + H; C6H7 + C2H2 -> C8H9 (leading to higher members).Relative coefficients are derived from product ratios, and the system has been closely matched with a model scheme.The products of the mutual termination reaction of two C2H3 radicals have been investigated.