Question
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: $K[Cr(H_2O)_2(C_2O_4)_2].3H_2O$
✓
Answer
$\mathrm{K}\left[\mathrm{Cr}\left(\mathrm{H}_2 \mathrm{O}\right)_2\left(\mathrm{C}_2 \mathrm{O}_4\right)_2\right] \cdot 3 \mathrm{H}_2 \mathrm{O}$
Potassium diaquadioxalatochromate (III) trihydrate.
Oxidation state of chromium $=3$
Electronic configuration: $3 d^3: \mathrm{t}_{2 \mathrm{~g}}{ }^3$
Coordination number $=6$
Shape: octahedral
Stereochemistry:
Magnetic moment, µ = $\sqrt{\text{n}(\text{n}+2)}$
$=\sqrt{3(3+2)}$
$=\sqrt{15}$
$=\text{~}4\text{BM}$
Potassium diaquadioxalatochromate (III) trihydrate.
Oxidation state of chromium $=3$
Electronic configuration: $3 d^3: \mathrm{t}_{2 \mathrm{~g}}{ }^3$
Coordination number $=6$
Shape: octahedral
Stereochemistry:
Magnetic moment, µ = $\sqrt{\text{n}(\text{n}+2)}$
$=\sqrt{3(3+2)}$
$=\sqrt{15}$
$=\text{~}4\text{BM}$
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