Question

Why compound sif6 is form but sicl6 is not form

Answer 1

SiF6 is form because it is stable and it is known whereas Sicl6 is not stable and also it is not known that's why SiF6 is form.

Answer 2

$\huge\boxed{\underline{\mathcal{\red{A}\green{N}\pink{S}\orange{W}\blue{E}\purple{R}}}}$

❤⭐MAIN REASONS:- ⭐❤

1. six lagre chloride ions cannot be accomodated around ${Si}^4+$ due to $\purple{\tt{Limitation}}$of its size.
2. Interaction between lone pair of chloride ion and${Si^4+}$ is not very strong.