. Which of the following is not correctly matched

A. [Fe(en)3]3+ - sp3d2 and paramagnetic

B. [FeCl4 ]2– - sp3 and paramagnetic

C. [Fe(CN)6]3– - d2sp3 and paramagnetic

D. [Fe(CO)2(NO+)2] - sp3 and diamagnetic

Best Answer

Ans: A

Sol: [Fe(en)3]3+ - d2sp3 with one unpaired electron. 'en' is a strong field chelating ligand and thus compels for the pairing of electrons to have d2sp3 hybridisation. It is paramagnetic with one unpaired electron (valence shell electron configuration, 3d5)

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