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3. STEREOKEMIJA - PBF

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CIS -TRANS – IZOMERIJA - cikloalkani<br />

Cis-trans izomerija kod cikloalkana<br />

Ako se dva istovrsna supstituenta nalaze na istoj strani obzirom na<br />

ravninu prstena govorimo o cis-izomeru, a ako su usmjerena<br />

prema različitim stranama, radi se o trans-izomeru<br />

• 1,3-dimetilciklopentan<br />

H 3 C<br />

H<br />

3<br />

1<br />

CH 3<br />

H<br />

≡<br />

H<br />

H 3 C<br />

3<br />

1<br />

H<br />

CH 3<br />

H 3 C<br />

H<br />

3<br />

1<br />

H<br />

CH 3<br />

cis-izomer<br />

trans-izomer<br />

23

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