# 9.24     Write down the IUPAC name for the following complex and indicate the oxidation state, electronic configuration and coordination number. Also give stereochemistry and magnetic moment of the complex:                  $(iv) Cs[FeCl_{4}]$

The IUPAC name of the given compound is Caesium tetrachloroferrate (III).

The oxidation state of Cs in this compound is +3.

The electronic configuration is d5.

The coordination number of this compound is 4.

The magnetic moment of a compound is given by :

$=\ \sqrt{n(n+2)}$                                  Here n is the number of the unpaired electrons.

or                                                                                  $=\ \sqrt{5(5+2)}\ =\ \sqrt{35}BM=5.92$

Stereochemistry:-    Optically inactive.

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