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Proton and hydrogen atom transfers between ionized enols and neutral aldehydes

✍ Scribed by Henri-Edouard Audier; Guy Bouchoux; Philippe Mourgues; Florence Penaud-Berruyer

Publisher
John Wiley and Sons
Year
1992
Tongue
English
Weight
404 KB
Volume
27
Category
Article
ISSN
1076-5174

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✦ Synopsis

Abstract

The rates of proton transfer and hydrogen atom abstraction between ionized enols [CH~2~CHOH]^+^˙ and [CH~2~C(CH~3~)OH]^+^˙ were measured by Fourier transform ion cyclotron resonance Spectrometry. It was observed that proton transfer is favoured by its high rate even when it does not reach the limiting collision rate. When a competition is in principle possible between H^+^, H˙ and H^−^ transfers, only the former process is observed. This phenomenon and the low efficiency of hydrogen atom abstraction are discussed in terms of the potential energy profile, where the stability of the intermediate complexes plays a critical role.

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Absolute Rate Calculations: Atom and Pro
Absolute Rate Calculations: Atom and Proton Transfers in Hydrogen-Bonded Systems
✍ Mónica Barroso; Luis G. Arnaut; Sebastião J. Formosinho 📂 Article 📅 2005 🏛 John Wiley and Sons 🌐 English ⚖ 159 KB 👁 2 views

## Abstract __We calculate energy barriers of atom‐ and proton‐transfer reactions in hydrogen‐bonded complexes in the gas phase. Our calculations do not involve adjustable parameters and are based on bond‐dissociation energies, ionization potentials, electron affinities, bond lengths, and vibration