Which of the following systems has maximum number of unpaired electrons in an inner octahedral complex?

d⁵

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d⁴

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d⁷

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d⁹

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Solution

The correct option is B
d⁴

d⁴=2 unpaired electron d⁹, d⁷ (inner octahedral complex is not possible) and in d⁵one unpaired electron.

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d

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