Why flurides are unstable in their lower oxidation state with transition elements?
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The fluorides are unstable in their lower oxidation state with transition elements because:
- The size of Fluoride ions is very small in comparison to the size of metals.
- Due to this reason, the electron - electron repulsion is high and the bond is weak.
- Moreover, Fluorine is the most electronegative element in nature, so it oxidises the transition metal to higher oxidation state.
- So the fluorides are unstable in their lower oxidation state.
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