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Synthesis and Reactivity of Novel Niobocene Complexes Containing Allyl or 1-Azaallyl Ligands. X-ray Crystal Structure of [Li{η<SUP>3</SUP>-N(SiMe<INF>3</INF>)C(<SUP>t</SUP><SUP></SUP>Bu)CH<INF>2</INF>}]<INF>3</INF>

Authors :
Antinolo, A.
Huertas, C.
Hierro, I. del
Lappert, M. F.
Otero, A.
Prashar, S.
Rodriguez, A. M.
Villasenor, E.
Source :
Organometallics; December 21, 1998, Vol. 17 Issue: 26 p5874-5879, 6p
Publication Year :
1998

Abstract

The lithium 1-azaallyl complex [Li{η&lt;SUP&gt;3&lt;/SUP&gt;-N(SiMe&lt;INF&gt;3&lt;/INF&gt;)C(&lt;SUP&gt;t&lt;/SUP&gt;Bu)CH&lt;INF&gt;2&lt;/INF&gt;}]&lt;INF&gt;3&lt;/INF&gt; (&lt;BO&gt;1&lt;/BO&gt;), has been prepared, and its X-ray crystal structure was determined. The niobocene(III) allyl and 1-azaallyl complexes Cp‘&lt;INF&gt;2&lt;/INF&gt;Nb[η&lt;SUP&gt;3&lt;/SUP&gt;-CH&lt;INF&gt;2&lt;/INF&gt;C(R)CH&lt;INF&gt;2&lt;/INF&gt;] (Cp‘ = η&lt;SUP&gt;5&lt;/SUP&gt;-C&lt;INF&gt;5&lt;/INF&gt;H&lt;INF&gt;4&lt;/INF&gt;SiMe&lt;INF&gt;3&lt;/INF&gt;; R = H (&lt;BO&gt;2&lt;/BO&gt;), Me (&lt;BO&gt;3&lt;/BO&gt;)) and Cp‘&lt;INF&gt;2&lt;/INF&gt;Nb[N(SiMe&lt;INF&gt;3&lt;/INF&gt;)C(&lt;SUP&gt;t&lt;/SUP&gt;Bu)CH&lt;INF&gt;2&lt;/INF&gt;] (&lt;BO&gt;4&lt;/BO&gt;) have been synthesized. Oxidation of &lt;BO&gt;2&lt;/BO&gt; and &lt;BO&gt;3&lt;/BO&gt; by O&lt;INF&gt;2&lt;/INF&gt; yields Cp‘&lt;INF&gt;2&lt;/INF&gt;Nb[η&lt;SUP&gt;1&lt;/SUP&gt;-CH&lt;INF&gt;2&lt;/INF&gt;C(R)CH&lt;INF&gt;2&lt;/INF&gt;](O) (R = H (&lt;BO&gt;5&lt;/BO&gt;), Me (&lt;BO&gt;6&lt;/BO&gt;)). The complexes CpNb(&amp;dbd;N&lt;SUP&gt;t&lt;/SUP&gt;Bu)[η&lt;SUP&gt;1&lt;/SUP&gt;-CH&lt;INF&gt;2&lt;/INF&gt;C(R)CH&lt;INF&gt;2&lt;/INF&gt;]Cl (Cp = η&lt;SUP&gt;5&lt;/SUP&gt;-C&lt;INF&gt;5&lt;/INF&gt;H&lt;INF&gt;5&lt;/INF&gt;; R = H (&lt;BO&gt;7&lt;/BO&gt;), Me (&lt;BO&gt;8&lt;/BO&gt;)) have also been prepared. Oxidation of &lt;BO&gt;2&lt;/BO&gt;−&lt;BO&gt;4&lt;/BO&gt; by PbCl&lt;INF&gt;2&lt;/INF&gt; gave Cp‘&lt;INF&gt;2&lt;/INF&gt;Nb[η&lt;SUP&gt;1&lt;/SUP&gt;-CH&lt;INF&gt;2&lt;/INF&gt;C(R)CH&lt;INF&gt;2&lt;/INF&gt;]Cl (R = H (&lt;BO&gt;9&lt;/BO&gt;), Me (&lt;BO&gt;10&lt;/BO&gt;)) and Cp‘&lt;INF&gt;2&lt;/INF&gt;Nb[N(SiMe&lt;INF&gt;3&lt;/INF&gt;)C(&lt;SUP&gt;t&lt;/SUP&gt;Bu)CH&lt;INF&gt;2&lt;/INF&gt;]Cl (&lt;BO&gt;11&lt;/BO&gt;). Cp‘&lt;INF&gt;2&lt;/INF&gt;Nb[η&lt;SUP&gt;1&lt;/SUP&gt;-CH&lt;INF&gt;2&lt;/INF&gt;C(R)CH&lt;INF&gt;2&lt;/INF&gt;](L) (L = CO (&lt;BO&gt;12&lt;/BO&gt;), CN(2,6-Me&lt;INF&gt;2&lt;/INF&gt;−C&lt;INF&gt;6&lt;/INF&gt;H&lt;INF&gt;3&lt;/INF&gt;) (&lt;BO&gt;13&lt;/BO&gt;)) were prepared by the reaction of Cp‘&lt;INF&gt;2&lt;/INF&gt;NbCl(L) with ClMg(CH&lt;INF&gt;2&lt;/INF&gt;CHCH&lt;INF&gt;2&lt;/INF&gt;).

Details

Language :
English
ISSN :
02767333 and 15206041
Volume :
17
Issue :
26
Database :
Supplemental Index
Journal :
Organometallics
Publication Type :
Periodical
Accession number :
ejs1153576

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