JEE MAIN - Chemistry (2022 - 28th June Morning Shift - No. 4)
Given below are two statements :
Statement I : [Ni(CN)4]2$$-$$ is square planar and diamagnetic complex, with dsp2 hybridization for Ni but [Ni(CO)4] is tetrahedral, paramagnetic and with sp3-hybridication for Ni.
Statement II : [NiCl4]2$$-$$ and [Ni(CO)4] both have same d-electron configuration have same geometry and are paramagnetic.
In light the above statements, choose the correct answer from the options given below :
Both Statement I and Statement II are true.
Both Statement I and Statement II are false.
Statement I is correct but Statement II is false.
Statement I is false but Statement II is correct.
Explanation
[Ni(CN)4]2ā : d8 configuration, SFL, sq. planar splitting (dsp2), diamagnetic.
[Ni(CO)4] : d10 config (after excitation), SFL, tetrahedral splitting (sp3), diamagnetic.
[NiCl4]2ā : d8 config, WFL, tetrahedral splitting (sp3), paramagnetic(2 unpaired eā).
[Ni(CO)4] : d10 config (after excitation), SFL, tetrahedral splitting (sp3), diamagnetic.
[NiCl4]2ā : d8 config, WFL, tetrahedral splitting (sp3), paramagnetic(2 unpaired eā).
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