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Energies 2012, 5(6), 1705-1712; doi:10.3390/en5061705
Article

Intermolecular Hydrogen Transfer in Isobutane Hydrate

1, 1, 2
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 and 1,*
Received: 5 April 2012; in revised form: 18 May 2012 / Accepted: 22 May 2012 / Published: 25 May 2012
Download PDF [378 KB, uploaded 25 May 2012]
Abstract: Electron spin resonance (ESR) spectra of butyl radicals induced with γ-ray irradiation in the simple isobutane (2-methylpropane) hydrate (prepared with deuterated water) were investigated. Isothermal annealing results of the γ-ray-irradiated isobutane hydrate reveal that the isobutyl radical in a large cage withdraws a hydrogen atom from the isobutane molecule through shared hexagonal-faces of adjacent large cages. During this “hydrogen picking” process, the isobutyl radical is apparently transformed into a tert-butyl radical, while the sum of isobutyl and tert-butyl radicals remains constant. The apparent transformation from isobutyl to tert-butyl radicals is an irreversible first-order reaction and the activation energy was estimated to be 35 ± 3 kJ/mol, which was in agreement with the activation energy (39 ± 5 kJ/mol) of hydrogen picking in the γ-ray-irradiated propane hydrate with deuterated water.
Keywords: hydrogen abstraction; clathrate hydrate; radical; electron spin resonance; activation energy hydrogen abstraction; clathrate hydrate; radical; electron spin resonance; activation energy
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Kobayashi, N.; Minami, T.; Tani, A.; Nakagoshi, M.; Sugahara, T.; Takeya, K.; Ohgaki, K. Intermolecular Hydrogen Transfer in Isobutane Hydrate. Energies 2012, 5, 1705-1712.

AMA Style

Kobayashi N, Minami T, Tani A, Nakagoshi M, Sugahara T, Takeya K, Ohgaki K. Intermolecular Hydrogen Transfer in Isobutane Hydrate. Energies. 2012; 5(6):1705-1712.

Chicago/Turabian Style

Kobayashi, Naohiro; Minami, Takashi; Tani, Atsushi; Nakagoshi, Mikio; Sugahara, Takeshi; Takeya, Kei; Ohgaki, Kazunari. 2012. "Intermolecular Hydrogen Transfer in Isobutane Hydrate." Energies 5, no. 6: 1705-1712.


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