The formation of stable polyhalides is a characteristic of larger alkali metals. Which of the following compounds is a known, stable polyhalide that contains ionic bonds between the metal and the poly

Question

The formation of stable polyhalides is a characteristic of larger alkali metals. Which of the following compounds is a known, stable polyhalide that contains ionic bonds between the metal and the polyhalide anion?

Prashant Kotian · Accepted Answer

Correct answer: C. Heavy alkali metals like Caesium () can stabilize large polyhalide anions due to high lattice energy matching. is an ionic compound existing as and the linear polyhalide anion . Small cations like cannot stabilize these large anions.

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