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ISOMERIA

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H H<br />

C C<br />

H3C CH3<br />

cis-2-butene<br />

cis butene<br />

+ Br 2<br />

Br<br />

C C<br />

H3C Br<br />

H<br />

H<br />

R R<br />

CH 3<br />

HC 3 Br<br />

H C C<br />

H<br />

Br CH3<br />

S S<br />

50%<br />

enantiomeri<br />

50%<br />

La miscela 1:1 dei due enantiomeri non è otticamente attiva.<br />

Tale miscela viene definita racemica

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