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Knowing that the fluoride ion is a weak field ligand and that the[CoF] complex i

ID: 681465 • Letter: K

Question

Knowing that the fluoride ion is a weak field ligand and that the[CoF] complex ion is octahedral, which of the following statementsis correct about the magnetic properties of this complex ion?
A. It is diamagnetic B. It is paramagnetic, with one unpaired electron C. It is paramagnetic with two unpaired electrons D. It is paramagnetic with three unpaired electrons E. None of the statements are true.
A. It is diamagnetic B. It is paramagnetic, with one unpaired electron C. It is paramagnetic with two unpaired electrons D. It is paramagnetic with three unpaired electrons E. None of the statements are true.

Explanation / Answer

In this complex Co is in +3 oxidation state with anelectronic configuration of [Ar]3d64s0. There are 4 unpaired electrons in the valency shell of thecentral atom . These four corresponds to the peramagnetic nature .Out of the above given four options there is no answercorresponding to paramagnetic with four unpairedelectrons. So answer is E