In which of the following complex ion, the central metal ion... | Chemistry | SolveeIt

Question

In which of the following complex ion, the central metal ion is in a state of $sp^3d^2$ hybridisation ?

$[CoF_6] 3^ {3-}$

$[Co(NH_3 )_ 6 ] ^{3+}$

$[Fe(CN)_6]^{3-}$

$[Cr(NH_3)_6]^{3+}$

Answer

$[CoF_6] 3^ {3-}$

Explanation

Solution

Electronic configuration of $Co ^{2+}$ ion

$F ^{-}$ is a weak ligand. It cannot pair up electrons with $d$ -subshell and forms outer orbital octahedral complex. $\left[ Co \left( NH _{3}\right)_{6}\right]^{3+}$ ion

$\left[ Fe ( CN )_{6}\right]^{-3}$ ion

$\left[ Cr \left( NH _{3}\right)_{6}\right]^{3+}$ ion

$NH _{3}$ and $CN ^{-}$ are strong ligands. So, they form inner orbital complex.

Chemistry Question on coordination compounds

Solution