Q58 / 180 · KCET 2023 · Chemistry
Which of the following system in an octahedral complex has maximum unpaired electrons?
- A$d^9$ (high spin)
- B$d^6$ (low spin)
- C$d^4$ (low spin)
- Correct answerD$d^7$ (high spin)
Solution
\(\begin{array}{|c|c|}<br />\hline & \begin{array}{c}<br />\text { Unpaired } \\<br />\text { electrons }<br />\end{array} \\<br />\hline \begin{array}{c}<br />d^4 \text { (low spin) } \\<br />-16<br />\end{array} & 2 \\<br />\hline \begin{array}{c}<br />d^7 \text { (high } \\<br />\text { spin) }-1<br />\end{array} & 3 \\<br />\hline \begin{array}{c}<br />d^9 \text { (high } \\<br />\text { spin) }-1<br />\end{array} & 1 \\<br />\hline<br />\end{array}\)
$\therefore d^7$ (high spin) system has maximum unpaired electrons.
$\therefore d^7$ (high spin) system has maximum unpaired electrons.
Hence, the correct answer is option: 'D'.