Zn-OH2 and Zn-OH complexes with hydroborate-derived tripod ligands: a comprehensive study

Inorg Chem. 2006 Sep 4;45(18):7493-502. doi: 10.1021/ic060752f.

Abstract

The complete array of those hydrotris(pyrazolyl/thioimidazolyl)borate ligands that were developed and used in the author's laboratories, with N3, N2S, NS2, and S3 donor sets, was scanned for their ability to form Zn-OH2 and Zn-OH complexes. The coordination motifs found were Zn-OH2, Zn-OH, Zn-OH-Zn, and Zn-O2H3-Zn. Of these, the well-established Zn-OH motif was complemented with novel species bearing N3, NS2, and S3 tripods. The Zn-OH2 motif was observed only with pyrazolylborate ligands and only in unusual situations with coordination numbers higher than 4 for zinc. The new Zn-OH-Zn motif was realized for three different pyrazolylborates, for one NS2 tripod, and for two S3 tripods. Finally, it was verified that the Zn-O2H3-Zn motif again occurs only with pyrazolylborate ligands. The new complexes were identified by a total of 11 structure determinations.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Borates / chemistry*
  • Crystallography, X-Ray
  • Hydrogen Bonding
  • Hydroxides / chemistry*
  • Imidazoles / chemistry*
  • Ligands
  • Models, Molecular
  • Molecular Conformation
  • Organometallic Compounds / chemistry*
  • Pyrazoles / chemistry*
  • Stereoisomerism
  • Sulfhydryl Compounds / chemistry*
  • Zinc Compounds / chemistry*

Substances

  • Borates
  • Hydroxides
  • Imidazoles
  • Ligands
  • Organometallic Compounds
  • Pyrazoles
  • Sulfhydryl Compounds
  • Zinc Compounds
  • zinc hydroxide