Tetrapyrroles as π Donors: A Pd22+ Unit Sandwiched between Two Helical Bilindione-Palladium Moieties

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Abstract
Metalation of octaethylbilindione (H3OEB) with palladium(II) acetate produces the novel tetranuclear complex [Pd4(OEB)2] in which a (PdI2)2+ unit is sandwiched between two helical Pd(OEB) units (see picture). Treatment of [Pd4(OEB)2] with pyridine/ethanol gives the odd‐electron helical complex [Pd(OEB)].