Journal of Physical Chemistry

Ion chemistry at high temperatures. 1. Thermochemistry of the ammonium ion from variable-temperature equilibrium measurements: proton transfer, association, and …

M Meot-Ner, LW Sieck

Index: Meot-Ner (Mautner), Michael; Sieck, L. Wayne Journal of Physical Chemistry, 1990 , vol. 94, # 19 p. 7730 - 7734

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Abstract

At 580-680 K, the proton-transfer reaction t-C4H9++ NH3-NH4++ i-C4H8 is in equilibrium in mixtures containing ammonia and isobutene. In the same mixtures, t-C4H9NH3+ is also formed reversibly, and kinetic experiments identify the addition/thermal decomposition equilibrium NH4++ i-C4Hs+ Mt-C4H9NH3++ M. The decomposition of t-C4H9NH3+ is at the low-pressure limit, with rate constants of (1-14) X cm3/s, and E,= 29.1 kcal/mol. The ...