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Infrared characterization of formation and resonance stabilization of the Criegee intermediate methyl vinyl ketone oxide

Methyl vinyl ketone oxide is an important Criegee intermediate formed during the ozonolysis of isoprene, but its formation and resonance stabilization remain poorly characterized. Here, transient infrared spectroscopy of the syn-trans-conformer shows a stronger O‒O stretching band at 948 cm^-1 that confirms the stabilization.

Chen-An Chung
Yuan-Pern Lee
ResearchOpen Access22 Jan 2021
Communications Chemistry

Volume: 4, P: 1-6
A chemical link between methylamine and methylene imine and implications for interstellar glycine formation

The detection of glycine in comets is suggestive of a cosmic origin for amino acids on Earth, but the formation of glycine in interstellar media remains poorly understood. Here, infrared spectroscopy shows that the CH₂NH₂ radical can be formed from H + CH₃NH₂ in conditions relevant to dark interstellar clouds, supporting the proposal that glycine could be formed from the reaction of CH₂NH₂ and HOCO radicals.

Prasad Ramesh Joshi
Yuan-Pern Lee
ResearchOpen Access12 May 2022
Communications Chemistry

Volume: 5, P: 1-7
New experimental evidence to support roaming in the reaction Cl + isobutene (i-C₄H₈)

Li-Wei Chen
Ching-Ming Hung
Yuan-Pern Lee
ResearchOpen Access12 Jan 2017
Scientific Reports

Volume: 7, P: 1-7
Infrared identification of the Criegee intermediates syn- and anti-CH₃CHOO, and their distinct conformation-dependent reactivity

Criegee intermediates—formed by the breakdown of alkanes in the atmosphere—are difficult to identify in the gas phase. Here, the authors report the infrared spectrum of the Criegee intermediate CH₃CHOO and identify both the syn- and anti-conformers.

Hui-Yu Lin
Yu-Hsuan Huang
Yuan-Pern Lee
ResearchOpen Access11 May 2015
Nature Communications

Volume: 6, P: 1-7
Extremely rapid self-reaction of the simplest Criegee intermediate CH₂OO and its implications in atmospheric chemistry

Criegee intermediates play an important role in atmospheric chemistry but their direct study has proved difficult. Transient infrared absorption spectroscopy has now been used to probe the decay kinetics of the Criegee intermediate CH₂OO directly, revealing that its self-reaction is extremely rapid. This may have important consequences for the interpretation of previous laboratory experiments.

Yu-Te Su
Hui-Yu Lin
Yuan-Pern Lee
Research23 Mar 2014
Nature Chemistry

Volume: 6, P: 477-483
Formation reaction mechanism and infrared spectra of anti-trans-methacrolein oxide and its associated precursor and adduct radicals

Methacrolein oxide (MACRO) is an important carbonyl oxide produced in the atmospheric ozonolysis of isoprene, but its formation is still not fully described. Here, the authors characterize the source reaction of MACRO via infrared spectroscopy and report spectra of anti-trans-MACRO as well as its associated precursor and adduct radicals.

Jia-Rong Cai
Jung-Hsuan Su
Yuan-Pern Lee
ResearchOpen Access04 Mar 2022
Communications Chemistry

Volume: 5, P: 1-11

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Infrared characterization of formation and resonance stabilization of the Criegee intermediate methyl vinyl ketone oxide

A chemical link between methylamine and methylene imine and implications for interstellar glycine formation

New experimental evidence to support roaming in the reaction Cl + isobutene (i-C₄H₈)

Infrared identification of the Criegee intermediates syn- and anti-CH₃CHOO, and their distinct conformation-dependent reactivity

Extremely rapid self-reaction of the simplest Criegee intermediate CH₂OO and its implications in atmospheric chemistry

Formation reaction mechanism and infrared spectra of anti-trans-methacrolein oxide and its associated precursor and adduct radicals

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Infrared characterization of formation and resonance stabilization of the Criegee intermediate methyl vinyl ketone oxide

A chemical link between methylamine and methylene imine and implications for interstellar glycine formation

New experimental evidence to support roaming in the reaction Cl + isobutene (i-C4H8)

Infrared identification of the Criegee intermediates syn- and anti-CH3CHOO, and their distinct conformation-dependent reactivity

Extremely rapid self-reaction of the simplest Criegee intermediate CH2OO and its implications in atmospheric chemistry

Formation reaction mechanism and infrared spectra of anti-trans-methacrolein oxide and its associated precursor and adduct radicals

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Quick links

New experimental evidence to support roaming in the reaction Cl + isobutene (i-C₄H₈)

Infrared identification of the Criegee intermediates syn- and anti-CH₃CHOO, and their distinct conformation-dependent reactivity

Extremely rapid self-reaction of the simplest Criegee intermediate CH₂OO and its implications in atmospheric chemistry