More than steric effects: Unlocking the coordination chemistry of barium pyrazolates

Anna Y. O'Brien, Julia Hitzbleck, Ana Torvisco, Glen B. Deacon, Karin Ruhlandt-Senge*

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review


    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.

    Original languageEnglish
    Pages (from-to)172-182
    Number of pages11
    JournalEuropean Journal of Inorganic Chemistry
    Issue number1
    Publication statusPublished - 2008


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

    ASJC Scopus subject areas

    • Inorganic Chemistry


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