Synthesis, X-ray Crystal Structures, and NMR Spectroscopy of [PPh4]2[M(Te4)2], M = Hg, Cd, Zn

John C. Bollinger, Lisa C. Roof, Donna M. Smith, Jonathan M. McConnachie, James A. Ibers*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

The compounds [PPh4]2[M(Te4)2], M = Hg, Cd, Zn, have been prepared by reactions in DMF of appropriate metal salts with polytelluride solutions. X-ray crystal structure determinations were performed on single crystals of each compound. Crystal data for [PPh4]2[Hg(Te4)2]: tetragonal, P4, a = 21.365(3) Å, c = 11.268(2) Å, V = 5143 Å3, R = 0.079. Crystal data for [PPh4]2[Cd(Te4)2]: tetragonal, I4, a = 21.442(3) Å, c = 11.259(2) Å, V = 5176 Å3, R = 0.045. Crystal data for [PPh4]2[Zn(Te4)2]: tetragonal, I4, a = 21.396(4) Å, c = 11.169(2) Å, V = 5113 Å3, R = 0.094. These crystal structures are surprisingly complex, and the anions exhibit disorder; nevertheless, the anions have the expected structure of metal atoms coordinated tetrahedrally by two Te42− chelates. 125Te NMR spectra of these compounds and of [PPh4]2[Pd(Te4)2] are reported, and assignments of metal-bound and ring-bound Te nuclei are given. The resulting trends in the 125Te chemical shifts parallel those noted previously for the 77Se chemical shifts in the selenometalate analogues.

Original languageEnglish (US)
Pages (from-to)1430-1434
Number of pages5
JournalInorganic chemistry
Volume34
Issue number6
DOIs
StatePublished - Mar 1 1995

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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