Which of the following species is not stable ?

Question

Canvas Classes · Accepted Answer

🧠 The "Aha!" Moment
Stability in complex ions (coordination number 6) is a balance between the central atom's size and the ligands' "clout." If the central atom is too small and the ligands are too big, they simply can't all crowd around the center without pushing each other away.

🗺️ The Steric Struggle
1. Silicon vs ligands: Silicon (Si) is in the 3rd period (relatively small).
2. Fluorine vs Chlorine: Fluorine is the smallest halogen. Six fluorines can fit around Si safely ( is stable).
3.

More questions from this chapter