Monovalent group 15 cations L₂Pn + (L = σ-donor ligands, Pn = N, P, As, Sb, Bi) have attracted significant experimental and theoretical interest because of their unusual electronic structures and growing synthetic potential. Herein, we describe the synthesis of a family of antimony(I) and bismuth(I) cations supported by a bis(silylene) ligand [(TBDSi₂)Pn][BAr^F₄] (TBD = 1, 8, 10, 9-triazaboradecalin; Ar^F = 3,5-CF₃-C₆H₃; Pn = Sb, (2); Bi, (3)). The structures of 2 and 3 have been unambiguously characterized spectroscopically and by X-ray diffraction analysis and DFT calculations. They feature bis-coordinated Sb and Bi atoms which exhibit two lone pairs of electrons. The reactions of 2 and 3 with methyl trifluoromethane sulfonate provide a approach for the preparation of dicationic antimony(III) and bismuth(III) methyl complexes. Compounds 2 and 3 serve as 2e donors to group 6 metals (Cr, Mo), giving rise to ionic antimony and bismuth metal carbonyl complexes 6–9.

单价第 15 族阳离子 L ₂ Pn +（L = σ-供体配体，Pn = N、P、As、Sb、Bi）因其不寻常的电子结构和不断增长的合成潜力而引起了极大的实验和理论兴趣。_{在此，我们描述了由双（甲硅烷基）配体 [(TBDSi 2} )Pn][BAr ^F ₄ ] (TBD = 1, 8, 10, 9)支持的锑 (I) 和铋 (I) 阳离子家族的合成-triazaboradecalin；Ar ^F  = 3,5-CF ₃ -C ₆ H ₃；Pn = Sb，( 2 )；Bi，( 3 ))。2和3的结构已经通过光谱学和 X 射线衍射分析和 DFT 计算明确表征。它们具有双配位的 Sb 和 Bi 原子，它们具有两对孤对电子。2和3与三氟甲磺酸甲酯的反应为制备双阳离子锑(III)和铋(III)甲基配合物提供了一种途径。化合物2和3作为第 6 族金属（Cr、Mo）的 2e 供体，产生离子型锑和铋金属羰基络合物6-9。