Nickel–Borolide Complexes and Their Complex Electronic Structure Academic Article uri icon


  • Borolides (BC42-) can be considered as dianionic heterocyclic analogues of monoanionic cyclopentadienides. Although both are formally six-π-electron donors, we herein demonstrate that the electronic structure of their corresponding transition metal complexes differs significantly, leading to altered properties. Specifically, the 18-electron sandwich complex Ni(iPr2NBC4Ph2)2 (1) features an ∼90° angle between the Ni-B-N planes and is best described as a combination of three limiting resonance structures with the major contribution stemming from a formally Ni2+ species bound to two monoanionic radical (BC4•-) ligands. Compound 1 displays two sequential one-electron oxidation events over a small potential range of <0.2 V, which strikingly contrasts the large potential separations between redox partners in the family of metallocenes, and the potential reasons for this unusual observation are discussed.

published proceedings

  • Inorganic Chemistry

altmetric score

  • 2.25

author list (cited authors)

  • Yruegas, S., Tang, H., Bornovski, G. Z., Su, X., Sung, S., Hall, M. B., Nippe, M., & Martin, C. D

citation count

  • 0

complete list of authors

  • Yruegas, Sam||Tang, Hao||Bornovski, Gayle Z||Su, Xiaojun||Sung, Siyoung||Hall, Michael B||Nippe, Michael||Martin, Caleb D

publication date

  • November 2021