First slide

Organic molecular structures and naming

Question

IUPAC name of the compound is

Difficult

A

7-Chloro bicylo [0.2.4] oct-2-ene
B

7-Chloro bicylo[4.2.0]oct-2ene
C

7-Chloro bicylo[4.2.0]oct-5-ene
D

1-2-Chloro biCyclo[0.2.4]oct-5-ene

Solution

i)To number bicyclos, start-at one bridgehead carbon and move along the longest chain to the next bridge head carbon.
Continue along the next longest chain to return to the first bridgehead carbon, so that the shortest bridge is numbered last and the numbering in done in such a way that double bond get number as low as possible bond get number as low as possible

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