試題詳解

25. Which of the following statements is correct?
(A)The low-spin Ru(NH₃)₆ ²⁺ ion has 4 unpaired electrons.
(B)The Ni(H₂O)₆ ²⁺ ion has 0 unpaired electrons.
(C)The diamagnetic PdCl₄ ^2- ion has a tetrahedral d⁸ structure.
(D) CN^- is a weaker field ligand than SCN^-1 because the Fe(CN)₆ ^3- ion is paramagnetic with one unpaired electron and the Fe(SCN)₆ ^3- ion has five unpaired electrons.
(E)The F- ligand in the CrF₆ ^4- ion produces a weak field because the ion is known to have four unpaired electrons.