Question

Which of the following statements is not correct for $Si{F}_6^{2-}$ and $Cl{F}_6^{+}$?

• A. They are isoelectronic.
• B. They are isostructural.
• C. All possible $\angle FSiF$ and $\angle FClF$ angles are identical.
• D. $d_{Si-F}$ and $d_{Cl-F}$ (bond lengths) are identical.

Answer 1

Answer: (C), (D)

The correct options are
C All possible $\angle FSiF$ and $\angle FClF$ angles are identical.
D $d_{Si-F}$ and $d_{Cl-F}$ (bond lengths) are identical.

All the bond lengths are not equal as size of central atom is different.
Hence options C & D are correct.