formic acid,acetic acid,propanoic acid,butyric acid which is more stable and why?
Answers
Answer:
formic acid
Explanation:
n case of carboxylic acids, positive inductive effect (+I-effect) due to electron donating tendency of alkyl groups reduces the acidity. This is because the+I effect will increase the electron density on carbonyl carbon and thus reduces the C-O bond poarity. This results in relatively increased O-H bond strength. Thus making it less acidic.
Therefore among given alkyl carboxylic acids, the one with least alkyl group will be more acidic. Hence formic acid is strongest.
Among formic acid and phenol, formic is stronger acid because:
The delocalozation of negative charge after losing proton is more delocalized in formate ion on two oxygens, whereas in phenoxide ion O being more electronegative will always have higher charge density even after ring delocalization.