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Authors
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Anke, F. ; Boye, S. ; Spannenberg, A. ; Lederer, A. ; Heller, D. ; Beweries, T.
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Title
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Dehydropolymerisation of methylamine borane and an N-substituted primary amine borane using a PNP Fe catalyst
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Date
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23.06.2020
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Number
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58627
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Abstract
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Dehydropolymerisation of methylamine borane (H3B·NMeH2) using the well–known iron amido complex [(PNP)Fe(H)(CO)] (PNP=N(CH2CH2Pi Pr2)2) (1 ) gives poly(aminoborane)s by a chain–growth mechanism. In toluene, rapid dehydrogenation of H3B·NMeH2 following first–order behaviour as a limiting case of a more general underlying Michaelis–Menten kinetics is observed, forming aminoborane H2B=NMeH, which selectively couples to give high–molecular–weight poly(aminoborane)s (H2BNMeH)n and only traces of borazine (HBNMe)3 by depolymerisation after full conversion. Based on a series of comparative experiments using structurally related Fe catalysts and dimethylamine borane (H3B·NMe2H) polymer formation is proposed to occur by nucleophilic chain growth as reported earlier computationally and experimentally. A silyl functionalised primary borane H3B·N(CH2SiMe3)H2 was studied in homo– and co–dehydropolymerisation reactions to give the first examples for Si containing poly(aminoborane)s.
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Publisher
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Chemistry - A European Journal
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Wikidata
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Q89968720
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Citation
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Chemistry - A European Journal 26 (2020) 7889-7899
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DOI
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https://doi.org/10.1002/CHEM.202000809
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