Journal
INORGANIC CHEMISTRY
Volume 45, Issue 18, Pages 7493-7502Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ic060752f
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The complete array of those hydrotris(pyrazolyl/thioimidazolyl) borate ligands that were developed and used in the author's laboratories, with N-3, N2S, NS2, and S-3 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 N-3, NS2, and S-3 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 S-3 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.
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