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acetona + vinilacetilena -> A
A -H2O -> B

identificati A si B


Răspuns :

CH3-CO-CH3 + H2C=CH-C≡CH => CH3-C(CH3)(OH)-CH=CH-C≡CH (A)

CH3-C(CH3)(OH)-CH=CH-C≡CH ...-H2O...> CH3-C(CH3)=C=CH-C≡CH (B)