The number of paramagnetic metal complex species among , , , , , and with same number of unpaired electrons is .

Question

The number of paramagnetic metal complex species among , , , , ,  and  with same number of unpaired electrons is .

Canvas Classes · Accepted Answer

Strategy:
 Count the unpaired electrons for all listed complexes. Group together the paramagnetic ones that have identical numbers of unpaired electrons.

Step 1: Tabulate the properties
1. :  () strong field  low spin (0 unpaired). Diamagnetic.
2. :  () strong field  low spin (0 unpaired). Diamagnetic.
3. :  () weak field  high spin  (4 unpaired). Paramagnetic.
4. :  () strong field  low spin  (2 unpaired). Paramagnetic.
5. :  () weak field  high spin  (4 unpaired). Paramagnetic.
6. :  () stron

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