The new dihydridobis(3-nitro-1,2,4-triazolyl)borate ligand,[H
2B(tz
NO2)
2]
-, has been synthesized in dimethylacetamide solution,using 3-nitro-1,2,4-triazole and KBH
4 through careful temperaturecontrol, and characterized as its potassium salt. The zinc(II) andcadmium(II) complexes, {M[H
2B(tz
NO2)
2]Cl(H
2O)
2}, have beenprepared by metathesis of [H
2B(tz
NO2)
2]K with ZnCl
2 and CdCl
2,respectively. The complexes likely contain a metal core in whichthe ligand is coordinated to the metal ions in the
2-N,N' or
4-N,N',O,O' fashion. A single-crystal structural characterization isreported for the potassium dihydrobis(3-nitro-1,2,4-triazolyl)borate.The potassium salt is polymeric and shows several K···N andK···O interactions.