From Storable Sources of Atomic Nb⁻ and Ta⁻ Ions to Isolable Anionic Tris(1,3‐butadiene)metal Complexes: [M(η⁴‐C₄H₆)₃]⁻, M=Nb, Ta

Abstract

Hat trick: Homoleptic butadienemetalates of 4d and 5d metals have for the first time been structurally characterized. The niobium–naphthalene species [Nb(η4-C10H8)2(PMe3)2]− functions as a useful source of “naked” Nb− ions in its reaction with 1,3-butadiene to afford an unprecedented homoleptic niobium–butadiene complex [Nb(η4-C4H6)3]− (see structure). The tantalum analogue [Ta(η4-C4H6)3]− was obtained by a similar route. Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2002/2008/z703887_s.pdf or from the author. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.