Nonplanar σ2,π-and Planar σ2-Enediamide Coordinations of 1,4-Di(<i>p</i>-methoxyphenyl)-1,4-diaza-1,3-butadiene (=MeOC6H4-DAD) on Ta(η5-C5R5) Fragments (R=H,Me): Crystal Structures of TaCl2 (σ2,π-MeOC6H4-dad)(η5-C5H5) and Ta(σ2-MeOC6H4-dad)(η5-C5Me5)(η4-1,3-butadiene)

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  • Kazushi Mashima
    Department of Chemistry, Graduate School of Engineering Science, Osaka UniversityToyonaka, Osaka
  • Yutaka Matsuo
    Department of Chemistry, Graduate School of Engineering Science, Osaka UniversityToyonaka, Osaka
  • Kazuhide Tani
    Department of Chemistry, Graduate School of Engineering Science, Osaka UniversityToyonaka, Osaka

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Abstract

<jats:title>Abstract</jats:title> <jats:p>Treatment of TaCl4(η5-C5R5)[1 ; R = H (a), R = Me (b)] with a dilithio compound of 1,4-di(p-methoxyphenyl)-1,4-diaza-1,3-butadiene (abbr. MeOC6H4-DAD) gave TaCl2(σ2,π-MeOC6H4-dad)(η5-C5R5) [2; R = H (a), R = Me (b)]. Complexes 2 reacted with a magnesium-butadiene compound to afford Ta(σ2-MeOC6H4-dad)(η5-C5R5)(η4-1,3-butadiene)[3; R = H (a), R = Me (b)]. Crystal structures of 2a and 3b were determined by X-ray analysis.</jats:p>

Journal

  • Chemistry Letters

    Chemistry Letters 26 (8), 767-768, 1997-08-01

    Oxford University Press (OUP)

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