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Cyclopentadienyl(diamino)boranes and their Derivatives — a Family of Versatile Ligand Precursors for Constrained Geometry Complexes
Author(s) -
Braunschweig Holger,
Breitling Frank M.,
Homberger Melanie,
von Koblinski Carsten,
White Andrew J. P.,
Williams David J.
Publication year - 2003
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.200300219
Subject(s) - cyclopentadienyl complex , boranes , chemistry , ligand (biochemistry) , stereochemistry , nuclear magnetic resonance spectroscopy , boron , medicinal chemistry , crystallography , catalysis , organic chemistry , biochemistry , receptor
A wide range of potential ligand precursors for the preparation of boron‐bridged, constrained geometry complexes has been synthesized. These include (i) cyclopentadienyl(diamino)boranes such as (C 5 H 5 )B(N i Pr 2 )N(H)Cy ( 7 ), (C 5 H 5 )B(N i Pr 2 )N(H)Ph ( 8 ), and (C 5 H 5 )B{N(SiMe 3 ) 2 }N(H)Ph ( 9 ); (ii) the corresponding indenyl derivatives such as (C 9 H 7 )B(N i Pr 2 )N(H)Cy ( 10 ) and (C 9 H 7 )B{N(SiMe 3 ) 2 }N(H)Cy (11); and (iii) even bulkier derivatives, such as (C 5 Me 4 H)B{N(SiMe 3 ) 2 }N(H) t Bu ( 12 ), (C 5 Me 4 H)B{N(SiMe 3 ) 2 }N(H)Ph ( 13 ), and (C 13 H 9 )B(N i Pr 2 )N(H)Ph (C 13 H 9 = fluorenyl) ( 14 ). All compounds have been characterised by multinuclear NMR spectroscopy and mass spectrometry, and in the case of 14 by X‐ray diffraction.