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Related Experiment Video

Updated: Jan 30, 2026

Immunohistochemical Detection of 5-Methylcytosine and 5-Hydroxymethylcytosine in Developing and Postmitotic Mouse Retina
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5-Mercaptotetrazolyl-derived metallaboratranes.

Anthony F Hill1, Torsten Schwich, Yaoyao Xiong

  • 1Research School of Chemistry, Australian National University, Acton, Canberra, A.C.T., Australia. a.hill@anu.edu.au.

Dalton Transactions (Cambridge, England : 2003)
|January 29, 2019
PubMed
Summary

New organometallic compounds featuring buttressed boratrane ligands were synthesized. These complexes, derived from 1-tert butyl-5-thiotetrazole, offer novel structures for catalysis and materials science.

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Area of Science:

  • Organometallic Chemistry
  • Boron Chemistry
  • Coordination Chemistry

Background:

  • Thiotetrazole ligands offer unique coordination modes.
  • Boratrane complexes are of interest due to their structural diversity and potential applications.

Purpose of the Study:

  • To synthesize novel buttressed metallaboratranes using 1-tert butyl-5-thiotetrazole (HtttBu).
  • To explore the reactivity of HtttBu with sodium borohydride and subsequent reactions with transition metal precursors.

Main Methods:

  • Synthesis of sodium thiotetrazolylborate precursors, Na[H2B(tttBu)2] (Na[1]) and Na[HB(tttBu)3] (Na[2]).
  • Reactions of Na[1] and Na[2] with iridium and ruthenium precursors, specifically [IrCl(CO)(PPh3)2] and [RuCl(Ph)(CO)(PPh3)2].
  • Characterization of the resulting triply and doubly buttressed metallaboratranes using spectroscopic and analytical techniques.

Main Results:

  • Formation of Na[1] and Na[2] from HtttBu and Na[BH4] in different solvents.
  • Synthesis of a triply-buttressed ruthenaboratrane [Ru(CO)(PPh3){κ4-B,S,S',S''-B(tttBu)3}] (5) using Na[2].
  • Isolation of rare doubly-buttressed metallaboratranes [IrH(CO)(PPh3){κ3-B,S,S'-BH(tttBu)2}] (7) and [Ru(CO)(PPh3)2{κ3-B,S,S'-BH(tttBu)2}] (12) using Na[1].
  • Identification of an isolable thiotetrazoylborate complex [Ru(Ph)(CO)(PPh3){κ3-H,S,S'-H2B(tttBu)2}] (11) as an intermediate.

Conclusions:

  • Demonstrated the successful synthesis of novel triply and doubly buttressed metallaboratranes.
  • Highlighted the versatility of thiotetrazolylborate ligands in forming unique coordination complexes with transition metals.
  • Opened avenues for exploring the properties and applications of these structurally distinct organometallic compounds.