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On the Track of Novel Triel‐Stabilised Silylaminoiminoborenes
Author(s) -
Ott Holger,
Matthes Christoph,
Ringe Arne,
Magull Jörg,
Stalke Dietmar,
Klingebiel Uwe
Publication year - 2009
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200802669
Subject(s) - silylation , chemistry , adduct , halogen , aryl , amine gas treating , boranes , medicinal chemistry , polymer chemistry , organic chemistry , catalysis , alkyl , boron
Borenes and boranes : Silylaminoiminoborenes, such as depicted, were isolated after treatment of halogen triels with silylaminofluoroboranes. In addition, novel aryl‐ and silyl‐substituted diaminofluoroboranes were also prepared in order to substantiate this reaction route.Reactions between the halogen triels AlClMe 2 , AlBr 3 , GaCl 3 and the silylaminofluoroboranes (Me 3 Si) 2 NB(F)NRSiMe 3 (R=SiMe 3 , CMe 3 ) afforded the silylaminoiminoborenes, which were isolated as the triel adducts, such as Me 3 Si(Cl 3 Ga)NBNRSiMe 3 ( 6 ). In order to extent this reaction path to other fluoroboranes, novel aryl‐ and silyl‐substituted diaminofluoroboranes were synthesised. Because almost no open‐chain diaminofluoroboranes had been structurally characterised previously, corresponding fluoroboranes containing no silyl groups were crystallised for purposes of comparison. In complex reactions with the arylsilylaminofluoroboranes [(2,6‐( i Pr) 2 C 6 H 3 )(Me 3 Si)NB(F)NR 2 , R= i Pr, i Bu], amine adducts of borenium salts such as [( i Pr) 2 NH→B(Bu)NH‐2,6‐( i Pr) 2 C 6 H 3 ] + AlCl 4 − ( 13 ) were obtained.