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Magazine Chapter 10: Q.8. (page 390)
Question: Draw the structure corresponding to each IUPAC name.
a. (Z)-4-ethylhept-3-ene
b. (E)-3,5,6-trimethyloct-2-ene
c. (Z)-2-bromo-1-iodohex-1-ene
Short Answer
Answer
Step by step solution
Detect the parent carbon chain
Determine the parent carbon chain from the parent name and assign groups as per the numbering.
Alkenes
Alkenes are numbered such that the double bonds get the lowest values, followed by the groups attached.
Drawing the structures of the given compounds
The alkyl groups are placed around the C=C bonds as per E and Z names.
a. The parent name 鈥渉ept鈥� indicates that the parent chain consists of seven carbon atoms. The Z isomer has the higher priority groups on the same side of C=C.
Structure of a
b. The parent name 鈥渙ct鈥� indicates that the parent chain consists of eight carbon atoms. The E isomer has higher priority groups on the opposite sides of C=C.
Structure of b
c. The parent name 鈥渉ex鈥� indicates that the parent chain consists of six carbon atoms. The Z isomer has higher priority groups on the same side of C=C.
Structure of c
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