[Os(η5-B5H10)2]: A carbon-free analog of ferrocene

IF 45.8 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Science Pub Date : 2026-04-23 DOI:10.1126/science.aed9192

Stutee Mohapatra, Suvam Saha, Gaurav Joshi, Urvashi Gupta, Deepak Kumar Patel, Eluvathingal D. Jemmis, Sundargopal Ghosh

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Abstract

The synthesis of a carbon-free analog of ferrocene has been a long-standing goal in inorganic chemistry. We report here the preparation and crystallographic characterization of the carbon-free sandwich complex [Os(η⁵-B₅H₁₀)₂], which is qualitatively similar to ferrocene in structure and bonding. The metal-ring bonding is much stronger in [Os(η⁵-B₅H₁₀)₂], owing to rehybridization of the π molecular orbitals brought in by the bridging B-H-B hydrogens and the bent B-H_t bonds of the larger B₅H₁₀ ring (where B-H_t is the terminal B-H bond). This also leads to an unusually short ring-ring separation of 3.071 angstroms and a staggered conformation. The isomeric [Os(η⁵-B₅H₁₀)(η³-B₅H₁₀)], which features a coordination mode unknown for ferrocene, has also been isolated. A similar attempt for [Ru(η⁵-B₅H₁₀)₂] resulted only in [Ru(η⁵-B₅H₁₀)(η³-B₅H₁₀)].

查看原文本刊更多论文

[Os(η5-B5H10)2]：二茂铁的无碳类似物。

合成二茂铁的无碳类似物一直是无机化学领域的一个长期目标。本文报道了无碳夹层配合物[Os(η5-B5H10)2]的制备和晶体学表征，其结构和键合性质与二茂铁相似。在[Os(η5-B5H10)2]中，由于桥接的B-H- b氢和较大的B5H10环上弯曲的B-Ht键（其中B-Ht是末端B-H键）带来的π分子轨道的再杂化，金属环的键结要强得多。这也导致了异常短的3.071埃的环-环间距和交错构象。还分离出了具有二茂铁未知配位模式的同分异构体[Os(η5-B5H10)(η3-B5H10)]。对[Ru(η5-B5H10)2]的类似尝试只得到[Ru(η5-B5H10)(η3-B5H10)]。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Science 综合性期刊-综合性期刊

CiteScore

61.10

自引率

0.90%

发文量

审稿时长

2.1 months

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