Q 31:
31. h Which of the following molecule C-C bond length will be highest ?
(A) CF3-CF3 (B) F2CH-CHF2 (C) FCH2-CH2F (D) CH3-CF33
Dear student,
The above question can be answered on the basis of bent's rule which states that
A more electronegative element will increase the % p character in the orbital associated with it or a less electroneagtive element will decrease the % p character in orbital associated with it.
In the above question, as more and more number of F are attached to carbon, the % p character will increase in C-F bond thereby decreasing % p character in C-C bond, which will therefore decrease the bond length.
Hence if less number of F are attached, it means more % p character in C-C bond as compared to other cases, which will increase the bond length.
Hence the answer should be C.
Hope this helps
Regards
The above question can be answered on the basis of bent's rule which states that
A more electronegative element will increase the % p character in the orbital associated with it or a less electroneagtive element will decrease the % p character in orbital associated with it.
In the above question, as more and more number of F are attached to carbon, the % p character will increase in C-F bond thereby decreasing % p character in C-C bond, which will therefore decrease the bond length.
Hence if less number of F are attached, it means more % p character in C-C bond as compared to other cases, which will increase the bond length.
Hence the answer should be C.
Hope this helps
Regards