MCQ
The complex used as an anticancer agent is
- Atrans $ - [Co{(N{H_3})_3}C{l_3}]$
- ✓cis $ - [PtC{l_2}{(N{H_3})_2}]$
- Ccis$ - {K_2}[PtC{l_2}B{r_2}]$
- D$N{a_2}C{O_3}$
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Reason : There is delocalisation of electrons from filled $d$ orbitals into the empty orbitals on the $CO$ ligands.
$(i)$ $Co^{3+}$ (Octahedral complex with a strong field ligand)
$(ii)$ $Co^{3+}$ (Octahedral complex with a weak field ligand like $F^-$ )
$(iii)$ $Co^{2+}$ (Tetrahedral complex)
$(iv)$ $Co^{2+}$ (Square planar complex)