# Species Formula 3220 Chromium, dimer (Geo)Cr2 3221 Cr2(Cp)2(NO)3(NH2) (Geo)C10H12N4O3Cr2 3222 (Cp)2Cr2(NO)4C10H10N4O4Cr2 3223 (Cp)2Cr2(NO)4 (Geo)C10H10N4O4Cr2 3224 Tetrakis(mu-(6-methyl-2(1H)-pyridinato) dichromiumC24H24N4O4Cr2 3225 Dichromate ion (Geo)O7Cr2 3226 Chromium diacetate, dimerC8H12O8Cr2 3227 Cr2(CO)10 dianion (Geo)C10O10Cr2 3228 Cr2(CO)10 dianionC10O10Cr2 3229 Cr(II)2O10(0) (ACETCR) (Geo)C12H20O12Cr2 3230 Cr(III)2Cl9 (ZEBRON) (Geo) Cl9Cr2 3231 Trichromate ion (Geo)O10Cr3 3232 Manganese, cationMn 3233 Manganese, atomMn 3234 Bicyclopentadienyl manganeseC10H10Mn 3235 Manganese(III) nitrideNMn 3236 Manganese(III) nitride (Geo)NMn 3237 Mn(II)(NH3)6H18N6Mn 3238 Mn(II)(NH3)6 (Geo)H18N6Mn 3239 Manganese(II) oxideOMn 3240 Manganese(II) oxide (Geo)OMn