Thermal Decomposition of Donor‐Stabilized Phosphinoborane PH 2 BH 2 NMe 3 : A Tensimetry Study

The thermal decomposition of PH 2 BH 2 · NMe 3 ( 1 ) in closed system was studied by static tensimetry with membrane null‐manometer. Compound 1 is unstable already at room temperature and partially decomposes with the release of gaseous trimethylamine and nonvolatile polymeric material. Storage of 1...

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Published inEuropean journal of inorganic chemistry Vol. 2019; no. 35; pp. 3885 - 3891
Main Authors Butlak, Alina V., Kazakov, Igor V., Stauber, Andreas, Hegen, Oliver, Scheer, Manfred, Pomogaeva, Anna V., Timoshkin, Alexey Y.
Format Journal Article
LanguageEnglish
Published 22.09.2019
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Summary:The thermal decomposition of PH 2 BH 2 · NMe 3 ( 1 ) in closed system was studied by static tensimetry with membrane null‐manometer. Compound 1 is unstable already at room temperature and partially decomposes with the release of gaseous trimethylamine and nonvolatile polymeric material. Storage of 1 at 311 K for 53 days results in evolution of small amounts of hydrogen and phosphine. At temperatures up to 329 K, PH 3 evolution and BH 3 NMe 3 adduct formation is observed after 3 days, and above 387 K, considerable amount of hydrogen gas is released. The data obtained indicate that the pyrolysis of 1 in the closed system may result in the enrichment of the condensed phase with boron due to phosphine loss.
ISSN:1434-1948
1099-0682
DOI:10.1002/ejic.201900817