@article{Schwemlein1985ansam-23998,
  year={1985},
  doi={10.1016/0022-328X(85)80304-1},
  title={ansa-metallocene derivatives : IX. Electrochemical reactions of tetramethylethylene-bridged titanocene dichloride and dicarbonyl derivatives},
  number={3},
  volume={293},
  issn={0022-328X},
  journal={Journal of Organometallic Chemistry},
  pages={353--364},
  author={Schwemlein, Heinz and Tritschler, Wolfgang and Kiesele, Herbert and Brintzinger, Hans-Herbert}
}

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    <dc:contributor>Brintzinger, Hans-Herbert</dc:contributor>
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    <dc:creator>Kiesele, Herbert</dc:creator>
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    <dc:contributor>Tritschler, Wolfgang</dc:contributor>
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    <dc:creator>Brintzinger, Hans-Herbert</dc:creator>
    <dcterms:bibliographicCitation>Journal of Organometallic Chemistry ; 293 (1985), 3. - S. 353-364</dcterms:bibliographicCitation>
    <dcterms:abstract xml:lang="eng">In the reduction of tetramethylethylene-bridged (CH&lt;sub&gt;13&lt;/sub&gt;)&lt;sub&gt;4&lt;/sub&gt;C&lt;sub&gt;2&lt;/sub&gt;(C&lt;sub&gt;5&lt;/sub&gt;H&lt;sub&gt;4&lt;/sub&gt;)&lt;sub&gt;2&lt;/sub&gt;TiCl&lt;sub&gt;2&lt;/sub&gt; under argon, studied by cyclic voltammetry, a first reduction to the Ti&lt;sup&gt;III&lt;/sup&gt; stage occurs at a potential of −0.92 V vs. SCE, close to that of (C&lt;sub&gt;5&lt;/sub&gt;H&lt;sub&gt;5&lt;/sub&gt;)&lt;sub&gt;2&lt;/sub&gt;TiCl&lt;sub&gt;2&lt;/sub&gt;, and a second reduction to the Ti&lt;sup&gt;II&lt;/sup&gt; stage at a potential of −2.53 V, about 0.3 V more negative than in the corresponding reduction of the unbridged analogue. Decay of the tetramethylethylene-bridged Ti&lt;sup&gt;II&lt;/sup&gt; product is considerably faster than that of its unbridged analogue. Changes induced by the presence of an N&lt;sub&gt;2&lt;/sub&gt; or H&lt;sub&gt;2&lt;/sub&gt; atmosphere indicate the occurrence of secondary reactions.&lt;br /&gt;&lt;br /&gt;In the presence of CO, reduction to (CH&lt;sub&gt;3&lt;/sub&gt;)&lt;sub&gt;4&lt;/sub&gt;C&lt;sub&gt;2&lt;/sub&gt;(C&lt;sub&gt;5&lt;/sub&gt;H&lt;sub&gt;4&lt;/sub&gt;)&lt;sub&gt;2&lt;/sub&gt;Ti(CO)&lt;sub&gt;2&lt;/sub&gt; occurs at −2.0 V. This tetramethylethylene-bridged titanocene dicarbonyl complex, which is also formed by reduction of (CH&lt;sub&gt;3&lt;/sub&gt;)&lt;sub&gt;4&lt;/sub&gt;C&lt;sub&gt;2&lt;/sub&gt;(C&lt;sub&gt;5&lt;/sub&gt;H&lt;sub&gt;4&lt;/sub&gt;)&lt;sub&gt;2&lt;/sub&gt;TiCl&lt;sub&gt;2&lt;/sub&gt; with Mg metal under CO, undergoes irreversible reduction and oxidation at −2.78 and −0.08 V, respectively. When the latter process is conducted in the presence of Cl&lt;sup&gt;−&lt;/sup&gt;, the dichloride (CH&lt;sub&gt;3&lt;/sub&gt;)&lt;sub&gt;4&lt;/sub&gt;C&lt;sub&gt;2&lt;/sub&gt;(C&lt;sub&gt;5&lt;/sub&gt;H&lt;sub&gt;4&lt;/sub&gt;)&lt;sub&gt;2&lt;/sub&gt;TiCl&lt;sub&gt;2&lt;/sub&gt; is regenerated.</dcterms:abstract>
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    <dcterms:title>ansa-metallocene derivatives : IX. Electrochemical reactions of tetramethylethylene-bridged titanocene dichloride and dicarbonyl derivatives</dcterms:title>
    <dc:contributor>Kiesele, Herbert</dc:contributor>
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