Title: Photochemistry of the matrix-isolated α,β-unsaturated aldehydes acrolein, methacrolein and crotonaldehyde at 4.2 K
Abstract:The UV photolysis of the α,β-unsaturated aldehydes acrolein, methacrolein and crotonaldehyde in argon matrices at λ > 300 nm has shown a major photochemical deactivation pathway to be conformational i...The UV photolysis of the α,β-unsaturated aldehydes acrolein, methacrolein and crotonaldehyde in argon matrices at λ > 300 nm has shown a major photochemical deactivation pathway to be conformational isomerism to the thermodynamically less stable s-cis form. This type of isomerization may account for the rapid internal conversion observed in the gas phase. Matrix-isolated crotonaldehyde undergoes further isomerization to ethylketene and enol-crotonaldehyde, as observed in the analogous gas-phase photolysis. In addition, another H-abstraction product was detected (νOH= 3674 cm–1) which is probably derived from the photolysis of s-cis-crotonaldehyde. At shorter excitation wavelengths (λ > 230 nm) acrolein and methacrolein isomerize to methyl–ketene and dimethylketene, respectively.Read More
Publication Year: 1992
Publication Date: 1992-01-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 18
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