Abstract

New tertiary ferrocenyl stibines (I and III) and bismuthine (II) have been synthesized. All these compounds have been characterized by IR, MS, and NMR spectroscopy and the molecular structures of I–III have been determined by X-ray crystallography. Compounds I–III have also been studied by cyclic voltammetry (CV). Crystal structures of homoleptic stibine and bismuthine (I, II) adopt a “propeller” configuration with the three ferrocenyl groups tilted to minimize interatomic repulsion and exhibit helicoidal chirality. The structures of I and III show that both the stibines exhibit an intramolecular C−H···C interaction. The voltammograms of stibines show that E_1/2 values are more positive than that of ferrocene indicating that oxidation of Fc₃Sb is slightly more challenging in comparison to ferrocene. Triferrocenyl bismuthine (II) displays two redox waves with low resolution and a non-reversible process.

中文翻译：

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均配二茂铁锑和铋：合成与表征

摘要

合成了新的叔二茂铁锑（I和III）和铋（II ）。所有这些化合物均已通过 IR、MS 和 NMR 光谱进行了表征，并且I – III的分子结构已通过 X 射线晶体学确定。化合物I – III也通过循环伏安法 (CV) 进行了研究。同配锑和铋的晶体结构（I，II）采用“螺旋桨”构型，三个二茂铁基倾斜，以最大限度地减少原子间排斥力并表现出螺旋手性。I和III的结构表明，这两种锑都表现出分子内 CH−H···C 相互作用。锑的伏安图显示E _1/2值比二茂铁的值更正，这表明与二茂铁相比， Fc ₃ Sb 的氧化稍微更具挑战性。三铁茂基铋 ( II ) 显示两个低分辨率和不可逆过程的氧化还原波。