Final answer:
Yes, it is possible to form different geometric isomers (E/Z) when doing the Wittig reaction. Geometric isomerism occurs when the arrangement of atoms in space is different, despite having the same order of atom bonding. In the case of the Wittig reaction, two geometric isomers can be formed depending on the relative positions of the substituents on the carbon-carbon double bond.
Step-by-step explanation:
Yes, it is possible to form different geometric isomers (E/Z) when doing the Wittig reaction. Geometric isomerism, also known as cis-trans isomerism, occurs when the order of atom bonding is the same, but the arrangement of atoms in space is different. In the case of the Wittig reaction, where a carbon-carbon double bond is involved, the substituents on the double bond can be arranged either cis or trans to each other.
For example, in the reaction between an aldehyde or ketone with a phosphonium ylide, such as the Wittig reagent, two geometric isomers can be formed. These isomers are known as the cis-isomer and trans-isomer, depending on the relative positions of the substituents on the double bond.
It is important to note that geometric isomerism may not always be observed in the Wittig reaction, as it depends on the specific reactants and reaction conditions. However, it is generally possible to form different geometric isomers in this type of reaction.