\(\downarrow\quad\quad\quad\,\,\,\,\,\,\,\,\,\,\downarrow\)
\(+1\quad\quad\,\,\,\,\,\,\,\,\,\,+1\)
$(I)$ સિસ $- [Co(NH_3)_2(en)_2]^{3+}$ $(II)$ ટ્રાન્સ $-[IrCl_2(C_2O_4)_2]^{3-}$
$(III)\, [Rh(en)_3]^{3+}$ $(IV)$ સિસ $-[Ir(H_2O)_3Cl_3$
