(i) What type of isomerism is shown by complex `[Co(en)_(3)]Cl_(3)`?
(ii) Write the hybridisation and magnetic character of `[Co(C_(2)O_(4))_(3)]^(3-)`. (At.no. of Co = 27)
(iii) Write IUPAC name of the following Complex `[Cr(NH_(3))_(3) Cl_(3)]`

Explanation

`[Co(en)_(3)]Cl_(3)`
(i) Optical isomerism is shown by the complex `[Co(en)_(3)]Cl_(3)`

(ii) `[Co(C_(2)O_(4))_(3)]^(3-)`
Hybidisation : `d^(2)sp^(3)`, inner orbital complex, low spin

(iii) `[Cr(NH_(3))_(3) Cl_(3)]`
IUPAC name: triamminetrichloridochromium (iii)