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Reaction of Hexamethyldisilazane with Borane in Tetrahydrofuran
Author(s) -
Wrackmeyer Bernd,
Schwarze Bernd
Publication year - 1996
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.19966221208
Subject(s) - trimethylsilyl , borane , chemistry , tetrahydrofuran , adduct , trimer , nuclear magnetic resonance spectroscopy , medicinal chemistry , borazine , nmr spectra database , dimer , polymer chemistry , stereochemistry , organic chemistry , catalysis , spectral line , solvent , physics , astronomy , boron nitride
Hexamethyldisilazane 1 reacts with borane in tetrahydrofuran (THFBH 3 , 2 ) first by formation of an adduct (Me 3 Si) 2 NHBH 3 ( 3 ), and then either to the N,N‐bis‐(trimethylsilyl)‐μ‐aminodiborane 5 or to the mixture of 5 and N‐trimethylsilyl‐μ‐aminodiborane(6) 6 , depending on the reaction conditions. The compounds 5 and 6 can be quantitatively converted to the N,N′,N″‐tris(trimethylsilyl)borazine 4 . Three intermediates can be identified, namely N,N‐bis(trimethylsilyl)borane 7 , N,N‐bis(trimethylsilyl)amino(N′‐trimethylsilylamino)borane 8 and N‐trimethylsilylaminoborane‐trimer. All products and intermediates were characterized by multinuclear NMR spectroscopy, and coupling constant 1 J( 29 Si, 15 N) were measured from 29 Si NMR spectra by using the Hahn‐echo‐extended (HEED) INEPT pulse sequence.