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Acetaldehyde to but-2-enoic acid...

Acetaldehyde to but-2-enoic acid

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`2CH_(3)-CHO overset(OH^(-))rarr underset("3-hydroxy butanal")(CH_(3)-underset("(Aldol)")overset(OH)overset(|)(CH)-CH_(2)-CHO) underset(-H_(2)O)overset(Delta)rarr underset("But-2-enal")underset("(Crotanaldehyde)")(CH_(3)-CH=CH-CHO) 2CH_(3)-CHO overset(OH^(-))rarr underset("3-hydroxy butanal")(CH_(3)-underset("(Aldol)")overset(OH)overset(|)(CH)-CH_(2)-CHO) underset(-H_(2)O)overset(Delta)rarr underset("But-2-enal")underset("(Crotanaldehyde)")(CH_(3)-CH=CH-CHO) underset("Reagent")overset("Tollen.s")rarr underset("But-2-enoic acid")(CH_(3)-CH=CH-COOH)`
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