Structural investigations of Ir pincer complexes relevant to catalytic H2 release from the chemical hydrogen storage material H3BNH3

Travis J. Hebden, Paula M.B. Piccoli, Thomas F. Koetzle, Arthur J. Schultz, Karen I. Goldberg, D. Michael Heinekey, Thomas J. Emge, Karsten Krogh-Jespersen, Alan S. Goldman

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Ammonia borane (AB) is an interesting candidate for chemical hydrogen storage. The complex (POCOP)IrH2 (POCOP = η3-(1,3-OPtBu2)2C6H3) has been shown to be an efficient catalyst for H2 release from AB. Under low H2 pressure a dormant form of the catalyst appears, subsequently identified as (POCOP)Ir(H)2(BH3). This interesting s-bonded BH3 complex has been investigated by a variety of spectroscopic methods, including neutron diffraction analysis. During the course of AB dehydrogenation, the predominant Ir-containing species present in solution is (POCOP)IrH4. The structure of this complex has been investigated using a variety of NMR techniques and IR spectroscopy. We have also studied the structure of the closely related complex (PCP)IrH4 (PCP = η3-(1,3-CH2PtBu2)2C6H3)in solution. The resulting solution data reveal a different arrangement of H atoms around the Ir than a solid-state structure obtained by neutron diffraction analysis.

Original languageEnglish
Title of host publicationAmerican Chemical Society - 238th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers
Publication statusPublished - Dec 1 2009
Event238th National Meeting and Exposition of the American Chemical Society, ACS 2009 - Washington, DC, United States
Duration: Aug 16 2009Aug 20 2009

Publication series

NameACS National Meeting Book of Abstracts
ISSN (Print)0065-7727

Other

Other238th National Meeting and Exposition of the American Chemical Society, ACS 2009
CountryUnited States
CityWashington, DC
Period8/16/098/20/09

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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    Hebden, T. J., Piccoli, P. M. B., Koetzle, T. F., Schultz, A. J., Goldberg, K. I., Heinekey, D. M., Emge, T. J., Krogh-Jespersen, K., & Goldman, A. S. (2009). Structural investigations of Ir pincer complexes relevant to catalytic H2 release from the chemical hydrogen storage material H3BNH3. In American Chemical Society - 238th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers (ACS National Meeting Book of Abstracts).