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কোন যৌগটি বেশি সক্রিয়-
H-CHO
CH
3
-
CHO
CH
3
-
CH
2
-
CHO
CH
3
-
CO
-
CH
3
ANSWER : 1
Descrption
<p style="margin-left:0px;">The most reactive compound among the given options is <strong>H-CHO (formaldehyde)</strong>. Here's why:</p><p style="margin-left:0px;"><strong>Factors affecting reactivity:</strong></p><ul><li><strong>Steric hindrance:</strong> Bulky groups around the carbonyl carbon hinder nucleophilic attack.</li><li><strong>Electron-donating/withdrawing groups:</strong> Electron-withdrawing groups increase the positive charge on the carbonyl carbon, making it more attractive to nucleophiles.</li></ul><p style="margin-left:0px;"><strong>Analyzing the options:</strong></p><ol><li><strong>H-CHO:</strong> No steric hindrance, only a hydrogen atom. Has an electron-withdrawing oxygen atom directly attached to the carbonyl carbon, leading to the highest positive charge and hence highest reactivity.</li><li><strong>CH3-CHO (acetaldehyde):</strong> Has a slightly larger methyl group compared to H-CHO, introducing some minor steric hindrance. Still has an electron-withdrawing oxygen atom. Overall, less reactive than H-CHO.</li><li><strong>CH3-CH2-CHO (propionaldehyde):</strong> Even larger steric hindrance due to the two-carbon chain. Same electron-withdrawing effect as the others. Less reactive than both H-CHO and CH3-CHO.</li><li><strong>CH3-CO-CH3 (acetone):</strong> No steric hindrance at the carbonyl carbon due to the two methyl groups. However, both methyl groups are electron-donating, partially canceling the electron-withdrawing effect of the oxygen atom, resulting in the least positive charge on the carbonyl carbon and the lowest reactivity among all options.</li></ol>
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