Question
Give reason to explain why $ClF_3$ exists but $FCl_3$ does not exist.
✓
Answer
$ClF_3$ is known because chlorine can exhibit $+3$ oxidation state due to promotion of
Each of the three singly occupied orbitals overlap with p-orbital of each of three fluorine atoms to form $ClF_3($trigonal bipyramidal geometry, T-shaped molecule$).$
No $($i-orbitals are present in the valency shell of fluorine and thus excitation is not possible. Fluorine, therefore, does not exhibit positive oxidation state and so the formation of $FCl_3$ is not possible.
Each of the three singly occupied orbitals overlap with p-orbital of each of three fluorine atoms to form $ClF_3($trigonal bipyramidal geometry, T-shaped molecule$).$
No $($i-orbitals are present in the valency shell of fluorine and thus excitation is not possible. Fluorine, therefore, does not exhibit positive oxidation state and so the formation of $FCl_3$ is not possible.
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