In Example 24-5, we chose between a tetrahedral and a square-planar structure for [Ni(CN)₄]^2– based on magnetic properties. Could we similarly use magnetic properties to establish whether the ammine complex of Ni(II) is octahedral [Ni(NH₃)₆]²⁺ or tetrahedral [Ni(NH₃)₄]2⁺? Explain.

Example 24-5

The complex ion [Ni(CN)₄]^2– is diamagnetic. Use ideas from the crystal field theory to speculate on its probable structure.