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More than Steric Effects: Unlocking the Coordination Chemistry of Barium Pyrazolates

  1. Anna Y. O'Brien1,
  2. Julia Hitzbleck1,2,
  3. Ana Torvisco1,
  4. Glen B. Deacon2,
  5. Karin Ruhlandt-Senge1,2

Article first published online: 15 NOV 2007

DOI: 10.1002/ejic.200701020

Issue

European Journal of Inorganic Chemistry

European Journal of Inorganic Chemistry

Volume 2008, Issue 1, pages 172–182, January 2008

Additional Information

How to Cite

O'Brien, A. Y., Hitzbleck, J., Torvisco, A., Deacon, G. B. and Ruhlandt-Senge, K. (2008), More than Steric Effects: Unlocking the Coordination Chemistry of Barium Pyrazolates. European Journal of Inorganic Chemistry, 2008: 172–182. doi: 10.1002/ejic.200701020

Author Information

  1. 1

    Department of Chemistry, 1-014 Center for Science and Technology, Syracuse University, Syracuse, NY 13244-4100, USA, Fax: +1-315-443-4070

  2. 2

    School of Chemistry, Monash University, Clayton, Victoria 3168, Australia, Fax: +61-3-9905-4597

Publication History

  1. Issue published online: 19 DEC 2007
  2. Article first published online: 15 NOV 2007
  3. Manuscript Received: 20 SEP 2007

Funded by

  • National Science Foundation. Grant Numbers: CHE-0108098, CHE-0505863
  • Australian Research Council
  • National Science Foundation. Grant Numbers: CHE-9527858, CHE-0234912
  • Syracuse University
  • W. M. Keck Foundation

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Keywords:

  • Pyrazolates;
  • Barium;
  • N ligands;
  • Coordination modes;
  • Structure elucidation;
  • CVD precursors;
  • Synthetic methods

Graphical Abstract

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Abstract

To further our understanding of the coordination chemistry of the heavy alkaline earth metals, we here report on a family of barium pyrazolates bearing various substitution patterns that illustrate the delicate balance between ligand bulk, donor size, stoichiometry, and hapticity, while emphasizing the importance of secondary interactions including π-bonding, agostic interactions, and hydrogen bonding to stabilize these heavy-metal complexes. The dimeric compounds [{Ba(Me2pz)2(pmdta)}2] (1), [{Ba(Phpz)2(pmdta)}2] (2), [{Ba(tBupz)2(pmdta)}2] (3), [{Ba(MePhpz)2(tmeda)}2] (5), [{Ba(Ph2pz)2(tmeda)}2]·TMEDA (6), the polymer [{Ba(tBupz)2(NH3)2}n] (4), and the monomer [Ba(Ph2pz)2(tmeda)2]·TMEDA (7), were prepared using a variety of synthetic methods and were characterized spectroscopically and structurally. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)

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