Draw the structure of (Z)-4-isopropyl-6-methyl-3-heptene. Clearly show the proper (E) or (Z)...


Draw the structure of (Z)-4-isopropyl-6-methyl-3-heptene. Clearly show the proper (E) or (Z) stereochemistry about the double bond.

E-Z Configuration of Alkene Geometric Isomers

Alkenes are organic compounds that contain a carbon-carbon double bond. Double bonds are not able to rotate freely, so alkene geometric isomers may arise, which are alkenes whose structural formula is the same, but the spatial arrangement of the groups on the double bond differ. The isomers can be distinguished by using the E-Z naming system.

To use the E-Z notation, the bond is first split between the two atoms of the double bond. On each side, the numbers 1 and 2 are assigned to the groups on the double bond, giving the lowest number to the highest priority group. Priority is based on the atomic number of the atoms directly attached to the double bond. The atom with higher atomic number is given higher priority. In the case that there are two of the same atom, the priority is based on the atoms to which those are attached.

Then, the relative positions of the two groups given priority 1 are compared. If the two groups of highest priority are located on different sides of the double bond, it is labeled as (E). If the two groups are on the same side of the double bond, it is labeled as (Z).

Answer and Explanation: 1

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We can take the following steps to draw the structure of (Z)-4-isopropyl-6-methyl-3-heptene. See also the image below.

1. We start with the...

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Geometric Isomers: Definition & Examples


Chapter 1 / Lesson 6

Understand how to identify geometrical isomerism and see how it arises in alkenes and cyclic compounds. Explore various examples of geometric isomers.

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