why resonance effect dominates over inductive effect in most of the cases?
Answers
In case of 2p-2p orbital overlapping, the resonance effect is dominating as you already know the order of resonance >hyperconjugation > inductive effect
But for halides….
Looking at halogens (dont get confused about case of fluorine now) they have what kind of overlapping? U r right!! It is 2p and 3p for cl, 2p-4p for Br and similarly 2p and 5p for I.
Therefore this is considered to be poor overlapping and weak chemical bonds which make resonance less effective (remember this point)
As resonance gets weak what dominates is the inductive (you are think of hyperconjugation??! Then you need to brush up your basic concepts again)
As inductive is now a dominant factor, carbon is less electronegative and thus develops partial positive charge and as nucleus of halogen pulls electron pair towards itself jt develops partial negative. Due to overlapping (scam) inductive effect dominates over the resonance effect in case of halogens.
I think you still must be perplexed about fluorine… we know that a fluorine atom is highly electronegative and so its nucleus will have high tendency of pulling opposite charges. So it becomes reluctant to donate electrons. resonance effect becomes less effective than inductive effect.
it may helpful for you
In case of 2p-2p orbital overlapping, the resonance effect is dominating as you already know the order of resonance >hyperconjugation > inductive effect
But for halides….
Looking at halogens (dont get confused about case of fluorine now) they have what kind of overlapping? U r right!! It is 2p and 3p for cl, 2p-4p for Br and similarly 2p and 5p for I.
Therefore this is considered to be poor overlapping and weak chemical bonds which make resonance less effective (remember this point)
As resonance gets weak what dominates is the inductive (you are think of hyperconjugation??! Then you need to brush up your basic concepts again)
As inductive is now a dominant factor, carbon is less electronegative and thus develops partial positive charge and as nucleus of halogen pulls electron pair towards itself jt develops partial negative. Due to overlapping (scam) inductive effect dominates over the resonance effect in case of halogens.
I think you still must be perplexed about fluorine… we know that a fluorine atom is highly electronegative and so its nucleus will have high tendency of pulling opposite charges. So it becomes reluctant to donate electrons. resonance effect becomes less effective than inductive effect.
Hope this answer helps you
Please mark it as the brainliest