Multiple choice The correct IUPAC name of the complex [Co(en)3](NO32 is tris(ethylenediamine)cobalt(II) dinitrate dinitratotris(ethylenediamine)cobalt(II) triethylenediaminecobalt(II) nitrate tris(ethylenediamine)cobalt(II) nitrate tris(ethylenediamine)cobalt(III) nitrate Reveal answer Fill a bubble to check yourself D Correct answer Explanation Correct IUPAC name of the complex [Co(en)3](NO32 is tris(ethylenediamine)cobalt(II) nitrate.