Question
Chemistry Question on Organic Chemistry- Some Basic Principles and Techniques
Among the following, the pair in which the two species are not isostructural is
A
IO3- and XeO3
B
BH4- and NH4+
C
PF6- and SF
D
SiF4 and SF4
Answer
SiF4 and SF4
Explanation
Solution
SiF4 (silicon tetrafluoride) and SF4 (sulfur tetrafluoride) have different molecular geometries and are not isostructural. SiF4 has a tetrahedral geometry with all bond angles at 109.5 degrees, while SF4 has a see-saw or distorted tetrahedral geometry with bond angles of approximately 101.6 degrees. So, the correct option is (D): SiF4 and SF4