# Species Formula 7267 Hafnium(IV) hexaiodide, dianionI6Hf 7268 Hafnium(IV) hexaiodide, dianion (Geo)I6Hf 7269 Hafnium, dimerHf2 7270 Tantalum, cationTa 7271 Tantalum, atomTa 7272 Tantalum, anionTa 7273 TaH3H3Ta 7274 TaH3 (Geo)H3Ta 7275 Pentamethyl tantalum(V)C5H15Ta 7276 Pentamethyl tantalum(V) (Geo)C5H15Ta 7277 Ta(V)(Me)5 (DOSCIX) (Geo) C5H15Ta 7278 Ta(V)(Me)5 (DOSCIX)C5H15Ta 7279 Tantalum, pentakis(dimethylamino)- (Geo)C10H30N5Ta 7280 Ta(II)(NH3)6H18N6Ta 7281 Ta(II)(NH3)6 (Geo)H18N6Ta 7282 Methyl tantalum(V) oxide dihydroxide (Geo)CH5O3Ta 7283 Ta(Cp)(CO)4 (GISFIX) (Geo)C9H5O4Ta 7284 Ta(Cp)(CO)4 (GISFIX)C9H5O4Ta 7285 Tantalum(V) (OEt)4 (Geo)C5H15O5Ta 7286 Tantalum(V) (OMe)5C5H15O5Ta 7287 Tantalum(V) (OEt)5 (Geo)C10H25O5Ta