The Synthesis, Structure and Thermal Rearrangement Reaction of Tetramethyldisilane-bridged Bis(1-phenylcyclohexylcyclopentadienyl)tetracarbonyl Diiron

Abstract

Abstract: The reaction of 1,2-bis(1-phenylcyclohexylcyclopentadineyl)tetramethyldisilane with Fe(CO)₅in refluxing xylene afforded the diiron complex(Me₂SiSiMe₂)[(1-Ph-c-C₆H₁₀C₅H₃)Fe·(CO)]₂(μ-CO)₂(2), existing as a mixture of cis and trans isomers(2c and 2t), which were separated by column chromatography.When the two isomers were heated in refluxing xylene, the cis substrate(2c) rearranged to the trans product[Me₂Si(1-Ph-c-C₆H₁₀C₅H₃)Fe(CO)₂]₂(3t), while the trans substrate(2t) yielded the cis product(3c), respectively.This indicates that the rearrangement reaction is stereospecific.The molecular structures of compound 3c and 4t were determined by X-ray diffraction analysis.

Key words: Thermal rearrangement, Cyclopentadienyl, Stereospecificity, Crystal structure

CLC Number:

O627

TrendMD:

SUN Xiu-Li, WANG Bai-Quan, XU Shan-Sheng, ZHOU Xiu-Zhong, WENG Lin-Hong . The Synthesis, Structure and Thermal Rearrangement Reaction of Tetramethyldisilane-bridged Bis(1-phenylcyclohexylcyclopentadienyl)tetracarbonyl Diiron[J]. Chem. J. Chinese Universities, 2003, 24(10): 1801.

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