Synthesis, Structure, and Electronic Properties of [Cr₆@Sn₈Sb₈(en)₂]^3-: A Cr₆ Octahedron Encapsulated in a Zintl-Ion Ligand.

ABSTRACT: The reaction of CrCp₂ with K₂SnSb yields a Zintl-ion cluster containing an octahedral Cr₆ core, surrounded by an Sn₈Sb₈ ring and two further ethylenediamine ligands that cap two mutually trans Cr centers. The Cr-Cr bond lengths of 2.453(2) to 2.482(2) Å are remarkably short, much shorter than those in any of the 20-electron chalcogenide-capped analogues, Cr₆E₈(PR₃)₆, indicating unusually strong Cr-Cr bonding. An isotropic signal in the electron paramagnetic resonance (EPR) spectrum with g = 2.21 is consistent with a 23-electron Cr₆¹³⁺ core, three electrons more reduced than the Cr₆¹⁶⁺ units present in Cr₆E₈(PR

SUBMITTER: Chen WX 

PROVIDER: S-EPMC12272683 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature