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Comment on the C-C bond length for C(2)H...

Comment on the C-C bond length for `C_(2)H_(6)` and `C_(2)F_(6)` compounds

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`C-H (C_(2)H_(6)) gt C-H(C_(2)H_(4)) gt C-H(C_(2)H_(2))`.
This is because hybrid orbitals of carbon involved in overlapping with 1s orbital of hydrogen are `sp^(3), sp^(2)` and sp respectively and their sizes are in the order `sp^(3) gt sp^(2) gt sp`.
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