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  • Confused! kindly explain, Among the following complexes the one which shows zero crystal field stabilization energy (CFSE):

Among the following complexes the one which shows zero crystal field stabilization energy (CFSE):

  • Option 1)

    \left [ Mn(H_{2}O)_{6} \right ]^{3+}

  • Option 2)

    \left [ Fe(H_{2}O)_{6} \right ]^{3+}

  • Option 3)

    \left [ Co(H_{2}O)_{6} \right ]^{2+}

  • Option 4)

    \left [ Co(H_{2}O) _{6}\right ]^{3+}

 

Answers (1)

As we learnt in 

CFSE in octahedral complex -

CFSE =\left [- \frac{2}{5}\left ( No. of\;electron\;in\;t_{2}g \right ) +\frac{3}{5}\left ( No. of\;\acute{e}s\;in\;eg \right ) \right ]\bigtriangleup \circ

-

 

 for Fe3+  we have    

CFSE =[(C-0.4 \times 3)+ (0.6 \times 2)]=0


Option 1)

\left [ Mn(H_{2}O)_{6} \right ]^{3+}

Incorrect

Option 2)

\left [ Fe(H_{2}O)_{6} \right ]^{3+}

Correct

Option 3)

\left [ Co(H_{2}O)_{6} \right ]^{2+}

Incorrect

Option 4)

\left [ Co(H_{2}O) _{6}\right ]^{3+}

Incorrect

Posted by

Vakul

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