1.

Write the following in the complex [Cr(en)3 [CrF6] (i) Type of complex (ii) Ligands (iii) central metal (iv) Oxidation state of central metal (v) IUPAC name

Answer»

The complex [Cr(en)3 [CrF6]  

Cation (complex)[Cr(en)3]3+
ligandsen - (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 - diaminetris(ethane - 1,2 - diamine)
central metalCr (in cationic complex)Chromium
Oxidation state of central metal (x)x+3 (0) = +3
x = +3
(III)
Anion (Complex)[CrF6]3-
ligands6F-
Name of the ligand with prefix4 ligands - prefix: hexa
Anionic ligand: Fluorido
hexafluorido
central metalCr (in anionic complex)chromate
Oxidation state of central metalx + 6 (-1) = -3
x = -3 + 6 = +3
(III)
IUPAC Name: Tris (ethane - 1,2 - diamine) chromium(III)hexafluoridochromate(III)


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