give reasons
i) benzaldehyde is less reactive than cyclohexane carbaldehyde
ii) the pka value of formic acid is less than acetic acid
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1)We know that stable compounds are less reactive.
In benzaldehyde we get to see pi alternate pi conjugation which leads to resonance and hence the stability increases, not to forget that benzene is aromatic hence even more stable. So it is less reactive.
Whereas in cyclohexane carbaldehyde there is no resonance due to no conjugation hence it is certainly less stable than benzene. Hence more reactive.
2) Formic acid is more acidic than acetic acid as methyl group from acetic acid shows +I effect and hence decreases the acidity.
pka value is inversely proportional to acidity
Acidity : Formic > acetic
Pka : acetic > Formic
ATB!
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