Tp*Sn(Cl)Bu2 as a convenient reagent for the preparation of hydrotris(3,5-dimethylpyrazolyl)borate complexes of niobium, tantalum, and zirconium

Kazushi Mashima, Toshiyuki Oshiki, Kazuhide Tani

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

Organotin complexes bearing a Tp* ligand, Tp*Sn(Cl)nBu3-n (1, n = 1; 2, n = 2; Tp* = hydrotris-(3,5-dimethylpyrazolyl)borate), were found to be useful reagents for introducing a Tp* ligand on niobium and tantalum as well as zirconium. The reactivities of these organotin compounds together with Tp*SnCl3 (3) were compared directly by using the reaction with ZrCl4, which affords Tp*ZrCl3 (4), as a test case. The reaction rate was in the order 1 > 2 » 3. Thus, complex 1 was used for the preparation of Tp*NbCl3 (5) and [Tp*TaCl3]-[TaCl6] (6), whose structures were confirmed by X-ray analysis. X-ray analysis of 1 indicated that one of the three Sn-N bonds in 1 was cleaved and that the Sn atom adopted a five-coordinate square pyramidal geometry that made complex 1 more reactive than the sixcoordinate complexes 2 and 3.

Original languageEnglish
Pages (from-to)2760-2762
Number of pages3
JournalOrganometallics
Volume16
Issue number13
Publication statusPublished - Jun 24 1997
Externally publishedYes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry

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