A new class of CVD precursors to metal borides: Cr(B3H 8)2 and related octahydrotriborate complexes

Dean M. Goedde, Gregory S. Girolami

Research output: Contribution to journalArticlepeer-review

Abstract

Treatment of CrCl3 with sodium octahydrotriborate, NaB3H8, affords a thermally unstable purple liquid thought to be a chromium(III) hydride of stoichiometry CrH(B3H8)2. This hydride converts rapidly at room temperature to the chromium(II) complex Cr(B3H8)2, which adopts a square-planar structure in which four hydrogen atoms form the coordination sphere of the chromium atom. This chromium(II) species forms six-coordinate Lewis base adducts Cr(B3H8)2L2, where L is Et2O, thf, or PMe3; the first two of these adopt trans geometries, whereas the latter is cis. Volatile Cr(B3H8)2 is the first homoleptic transition metal complex of the octahydrotriborate anion, and it readily forms CrB2 thin films by CVD at 250 °C.

Original languageEnglish (US)
Pages (from-to)12230-12231
Number of pages2
JournalJournal of the American Chemical Society
Volume126
Issue number39
DOIs
StatePublished - Oct 6 2004

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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