Question

For the following hydrogenation reaction, draw the correct product and select the correct IUPAC name for the organic reactant. (Ignore product stereochemistry in your answer.) When drawing hydrogen atoms on a carbon atom, either include all hydrogen atoms or none on that carbon atom, or your structure may be marked incorrect.

For the following hydrogenation reaction, draw the correct product and select the correct IUPAC name for the organic reactant. (Ignore product stereochemistry in your answer.) When drawing hydrogen atoms on a carbon atom, either include all hydrogen atoms or none on that carbon atom, or your structure may be marked incorrect. Select the correct IUPAC name for the organic reactant. (E)-3,4-ciimethyl-2-hexene (E)-3-methyl-4-ethyl-2-pentene (Z)-3-methyl-4-methylhexene (Z)-3,4-dimethyl-3-hexene

Answer 1

Concepts and reason

The question is based on the concept of cis/trans isomerism. When different substituents are attached to a double bond, the cis/trans nomenclature does not play role. Hence, the E/Z nomenclature is used to identify the geometric isomers.

Fundamentals

If the high priority groups are cis to each other, it is Z isomer and if they are trans to each other it is E isomer.

The hydrogenation reaction proceeds as follows:

Based on CIP rules, the priority is assigned to groups on same side of double bond.

Ans:

The organic product is as follows:

Answer 2

(Z)-3,4-dimethyl-3-hexene