Chemistry - Coordination Chemistry Question with Solution | TestHub

In case of complexes, isoelectronic species should be those having same effective atomic number (EAN) $\mathrm{Ni}(\mathrm{CO}{)}_4\Rightarrow 28+4\times 2=36$ (i) $\mathrm{V}(\mathrm{CO}{)}_6\Rightarrow 23+2\times 6=35$ (ii) $\mathrm{Cr}(\mathrm{CO}{)}_5\Rightarrow 24+2\times 5=34$ (iii) $\mathrm{Cu}(\mathrm{CO}{)}_3\Rightarrow 29+2\times 3=35$ (iv) $\mathrm{Mn}(\mathrm{CO}{)}_5\Rightarrow 25+2\times 5=35$ (v) $\mathrm{Fe}(\mathrm{CO}{)}_5\Rightarrow 26+2\times 5=36$ (vi) ${\left[\mathrm{Co}(\mathrm{CO}{)}_3\right]}^{3-}\Rightarrow 27+3+2\times 3=36$ (vii) ${\left[\mathrm{Cr}(\mathrm{CO}{)}_4\right]}^{4-}\Rightarrow 24+4+2\times 4=36$ (viii) $\left[\mathrm{Ir}(\mathrm{CO}{)}_3\right]\Rightarrow 77+2\times 3=83$