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Answer» The complex [Cr(en)3 [CrF6] | Cation (complex) | [Cr(en)3]3+ | | | ligands | en - (ethylenediamine) | | | Name of the ligand with prefix(Ligand itself contains a Greek prefix - di, use alternate prefix) | 3 ligands - prefix: tris Neutral ligand : ethane - 1,2 - diamine | tris(ethane - 1,2 - diamine) | | central metal | Cr (in cationic complex) | Chromium | | Oxidation state of central metal (x) | x+3 (0) = +3 x = +3 | (III) | | Anion (Complex) | [CrF6]3- | | | ligands | 6F- | | | Name of the ligand with prefix | 4 ligands - prefix: hexa Anionic ligand: Fluorido | hexafluorido | | central metal | Cr (in anionic complex) | chromate | | Oxidation state of central metal | x + 6 (-1) = -3 x = -3 + 6 = +3 | (III) | | IUPAC Name: Tris (ethane - 1,2 - diamine) chromium(III)hexafluoridochromate(III) |
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