Iminophosphonamido-Supported Plumbyliumylidenes: Structural Effects of Counter Anions and Lewis Acid Catalysis

Two-coordinate plumbyliumylidene ions constitute a rare class of highly electron-deficient cationic Pb(II) species. Herein, we report the synthesis and structural characterization of iminophosphonamido-supported plumbyliumylidene ions bearing two different borate counteranions, {B[(4-^tBuMe₂Si)C₆F₄]₄}^- and [B(C₆F₅)₄]^-. Single-crystal X-ray analyses reveal pronounced ion-pairing eff