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Selective B–H versus N–H Bond Activation in Ammonia Borane by [Ir(dppm) 2 ]OTf
Author(s) -
Rossin Andrea,
Caporali Maria,
Gonsalvi Luca,
Guerri Annalisa,
Lledós Agustí,
Peruzzini Maurizio,
Zanobini Fabrizio
Publication year - 2009
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200900465
Subject(s) - chemistry , ammonia borane , borane , adduct , yield (engineering) , boron , ammonia , lewis acids and bases , infrared spectroscopy , hydrogen bond , medicinal chemistry , frustrated lewis pair , crystallography , hydrogen , stereochemistry , hydrogen storage , molecule , catalysis , organic chemistry , materials science , metallurgy
Ammonia borane (AB, NH 3 · BH 3 ) was activated selectively on the boron hydrogen atoms by [Ir(dppm) 2 ]OTf, as shown by variable‐temperature 31 P, 11 B and 1 H NMR studies, to yield cis ‐ and trans ‐[Ir(H) 2 (dppm) 2 ]OTf dihydrides. X‐ray crystal structures of these complexes were obtained. DFT calculations suggest the key reaction intermediate to be a Lewis base (L) stabilised adduct, cis ‐[Ir(H)(BH 2 · L)(dppm) 2 ] + (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)
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