Synthesis, structural characterization and reactivity of the amino borane 1-(NPh2)-2-[B(C6F5)2]C6H4 |
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| Authors: | Roland Roesler Warren E Piers Masood Parvez |
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| Institution: | Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Altberta, Canada T2N 1N4 |
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| Abstract: | The bright red title compound 1 was synthesized from (2-lithiophenyl)diphenylamine and bis(pentafluorophenyl)boron chloride. Its reactions with small acids like H2O and HCl proceeded easily giving zwitterionic compounds. For 1 and its water adduct 2 the crystal structures were determined, the latter featuring an ammonium borate structure containing a short intramolecular hydrogen bond bridge. Treatment of 1 with Jutzi's acid, H(OEt2)2]B(C6F5)4], did not result in protonation of the nitrogen, but reaction of 1 with LiH in the presence of 12-crown-4, led to the isolation of the aminoborate 1-(Ph2N)-2-{B(H)(C6F5)2}C6H4]Li(12-crown-4)] (3). Borohydride 3 reacted with Jutzi's acid to regenerate 1 and liberate hydrogen. |
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| Keywords: | Boron Lewis acid Lewis base X-ray diffraction Hydrogen bonding |
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