The First Nitro-Substituted Heteroscorpionate Ligand

The new dihydridobis(3-nitro-1,2,4-triazolyl)borate ligand,
[H2B(tzNO2)2]-, has been synthesized in dimethylacetamide solution,
using 3-nitro-1,2,4-triazole and KBH4 through careful temperature
control, and characterized as its potassium salt. The zinc(II) and
cadmium(II) complexes, {M[H2B(tzNO2)2]Cl(H2O)2}, have been
prepared by metathesis of [H2B(tzNO2)2]K with ZnCl2 and CdCl2,
respectively. The complexes likely contain a metal core in which
the ligand is coordinated to the metal ions in the κ2-N,N‘ or κ4-N,N‘,O,O‘ fashion. A single-crystal structural characterization is
reported for the potassium dihydrobis(3-nitro-1,2,4-triazolyl)borate.
The potassium salt is polymeric and shows several K···N and
K···O interactions.