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TitleStructure and thermal decomposition of methylamine borane
Publication TypeJournal Article
Year of Publication2008
AuthorsBowden, M.E., Brown I.W.M., Gainsford G.J., and Wong H.
JournalInorganica Chimica Acta
Pagination2147 - 2153
Date Published2008
ISSN00201693 (ISSN)
AbstractThe crystal structure of methylamine borane has been determined and contains parallel chains of dihydrogen-bonded CH3NH2BH3 molecules. Thermal decomposition takes place from the melt (ΔHfusion = 8.5 kJ mol-1) and begins with the formation of an ionic borohydride. Hydrogen is liberated in two stages, at ca. 100 and 190 °C, with the observed rates during the first stage (ΔH = -25 kJ mol-1, Ea = 115 kJ mol-1) strongly dependent on temperature and time. cis- and trans-N-trimethylcyclotriborazane are formed during the first stage and subsequently cross-link to yield a non-volatile solid. Before this cross-linking, the system exhibited a high degree of volatility, with weight losses in excess of 80% observed in TG experiments using flowing gas. © 2007 Elsevier B.V. All rights reserved.

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