Question

Primary and secondary valency of platinum in the complex $\left[Pt\right(en{)}_{2}C{l}_2]$ are:

• A. $4,6$
• B. $2,6$
• C. $4,4$
• D. $2,4$

Answer 1

Answer: (B), (D)

The correct options are
B $2,6$
D $2,4$

The Given complex $\left[Pt\right(en{)}_{2}C{l}_2]$ The primary valence is its oxidation number i.e +2 and the secendory valency is its coordination number i.e 6 in this case.(The en ligand is bidentate, and Cl is monodentate).The second possibility is that compound can exist as $\left[Pt\right(en{)}_2]C{l}_2$ and hence the primary valency can also be +2 and secondary valence is 4. Hence option B and D are correct