Gas-phase basicity of formaldehyde by the thermokinetic method

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Eur. J. Mass Spectrom. 6, 109 - 112 (2000)

Gas-phase basicity of formaldehyde by the thermokinetic method

Guy Bouchoux^* and Danielle Leblanc
Département de Chimie, Laboratoire des Mécanismes Réactionnels, URA CNRS 1307, Ecole Polytechnique, 91128 Palaiseau cedex, France

ABSTRACT:

A series of proton transfer reactions monitored in a Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometer allows the determination of the gas-phase basicity (GB) and the proton affinity (PA) of formaldehyde. The values determined by the thermokinetic method, GB(CH₂O) = 681.5 ñ 0.7 kJ mol¹ and PA(CH₂O) = 711.5 ñ 2.1 kJ mol¹ are in excellent agreement with data originating from proton transfer equilibrium constant determinations or from G2 calculations.

Keywords: formaldehyde, basicity, proton affinity, thermokinetic method, FT-ICR

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