Communication

A (Tetrasilacyclobutadiene)tricarbonyliron Complex [{η⁴‐(tBu₂MeSi)₄Si₄}Fe(CO)₃]: The Silicon Cousin of Pettit's (Cyclobutadiene)tricarbonyliron Complex [(η⁴‐H₄C₄)Fe(CO)₃]^†

Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305‐8571, Japan

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Vladimir Ya. Lee Dr.

Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305‐8571, Japan

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Masaaki Ichinohe Dr.

Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305‐8571, Japan

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Akira Sekiguchi Prof. Dr.

sekiguch@staff.chem.tsukuba.ac.jp

Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305‐8571, Japan, Fax: (+81) 29‐853‐4314

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Kazunori Takanashi Dipl.‐Chem.

Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305‐8571, Japan

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Vladimir Ya. Lee Dr.

Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305‐8571, Japan

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Masaaki Ichinohe Dr.

Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305‐8571, Japan

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Akira Sekiguchi Prof. Dr.

sekiguch@staff.chem.tsukuba.ac.jp

Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305‐8571, Japan, Fax: (+81) 29‐853‐4314

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First published: 05 May 2006

https://doi.org/10.1002/anie.200600338

Citations: 37

^†

This work was supported by Grants‐in‐Aid for Scientific Research (Nos. 14078204, 16205008, 17655014) from the Ministry of Education, Culture, Sports, Science, and Technology and the COE (Center of Excellence) program.

Abstract

All in the family: [(η⁴‐R₄Si₄)Fe(CO)₃] 2 (R=SiMetBu₂) represents a neutral silicon congener of a (cyclobutadiene)tricarbonyliron complex and was synthesized by the reaction of the dibromocyclotetrasilene R₄Si₄Br₂ 1 with Na₂[Fe(CO)₄]. The tetrasilacyclobutadiene ligand in 2 has stronger π‐donating properties than the cyclobutadiene ligand in the parent complex [(η⁴‐H₄C₄)Fe(CO)₃].