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Hydrosilylation Synthesis of New Ferrocenylene Copolymers Containing Carbosilylene, Carbosiloxy and Cyclopentadienyliron Dicarbonyl Bridges

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Abstract

Bifunctional organometallic silicon precursor monomers and substrates FC(SiMe2H)2 (1) [FC = (η5-C5H4)Fe(η5-C5H4)]; FC(SiMe2(CH2)xCH=CH2)2 [x = 0 (2), 1 (3)], [η5-C5H4-SiMe2(CH2)xCH=CH2)]Fe(CO)2SiMe2(CH2)xCH=CH2 x = 0 (4), 1 (5) and (η5-C5H4-SiMe2H)Fe(CO)2SiMe2H (6) have been used to make a series of new iron containing polymers via hydrosilylation reactions. In addition to the vinyl- and allyl-containing substrates 2, 3, 4 and 5 the organosilicon compounds [CH2=CHSiMe2]2O, 1,4-(H2C=CH-SiMe2)2C6H4 and (HC≡CH–SiMe2)2O were also used as substrates for the hydrosilylation reaction. The reactions between the various SiH and CH=CH2 and C≡C functionalities were performed in the presence of Pt(0) catalyst and resulted in regioselective (β-isomer and β-(E) isomer) products as determined by NMR spectroscopy. Molecular weights of all the polymers were determined by Gel Permeation Chromatography, which revealed oligomeric materials with narrow polydispersity. Cyclic voltammetric studies of exhibited single reversible redox processes due to the Fe(II)/Fe(III) couple when present, and irreversible oxidation for the presence of any Fp Fe atom.

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Acknowledgements

Financial support from the R. Welch Foundation (Grant #AH-546) is gratefully acknowledged.

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  1. Department of Chemistry, University of Texas at El Paso, El Paso, TX, 79968-0513, USA

    Mukesh Kumar & Keith H. Pannell

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  1. Mukesh Kumar
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  2. Keith H. Pannell
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Correspondence to Keith H. Pannell.

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This article is dedicated to Professor Astruc.

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Kumar, M., Pannell, K.H. Hydrosilylation Synthesis of New Ferrocenylene Copolymers Containing Carbosilylene, Carbosiloxy and Cyclopentadienyliron Dicarbonyl Bridges. J Inorg Organomet Polym 18, 131–142 (2008). https://doi.org/10.1007/s10904-007-9190-8

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