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Synthesis and characterization of poly(pyrazolyl)borate tantalum amide complexes and their reactivities toward oxygen

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Abstract

Reaction of TaCl(NMe2)4 (1) with KTp* [Tp* = tris(3,5-dimethylpyrazolyl)borohydride] yields two products: Tp*Ta(NMe2)4 (2), in which one N atom of the Tp* ligand binds to Ta, and [Tp*Ta(NMe2)4]·2KTp* (3) where three N atoms of the Tp* ligand in [Tp*Ta(NMe2)4] (2a) bind to Ta. Addition of excess 1 to 3 did not exclude KTp*. Further reaction of 2 with oxygen affords Tp*BH(NMe2) (4). TpTa(NMe2)4 (5) has been synthesized by a similar procedure through the reaction of 1 with TpK [Tp = tris(pyrazolyl)borohydride]. Reactions of 3 and 5 with oxygen were also studied. 2, 4, and 5 were characterized by NMR, EA, and single-crystal X-ray diffraction.

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Authors and Affiliations

  1. Department of Chemistry, The University of Tennessee, Knoxville, TN, 37996-1600, USA

    ShuJian Chen & ZiLing Xue

  2. Department of Chemistry & Biochemistry, The University of Delaware, Newark, Delaware, 19716, USA

    Glenn P. A. Yap

Authors
  1. ShuJian Chen
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  2. Glenn P. A. Yap
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  3. ZiLing Xue
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Correspondence to ZiLing Xue.

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Supported by the US National Science Foundation (CHE-051692)

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Chen, S., Yap, G.P.A. & Xue, Z. Synthesis and characterization of poly(pyrazolyl)borate tantalum amide complexes and their reactivities toward oxygen. Sci. China Ser. B-Chem. 52, 1583–1589 (2009). https://doi.org/10.1007/s11426-009-0236-3

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