Page1 / 4

wittig reaction - Carlos Caceres Chemistry 3B lab The...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
wittig reaction

wittig reaction - Carlos Caceres Chemistry 3B lab The...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Carlos Caceres Chemistry 3B lab The Wittig Reaction Purpose: To use the Wittig reaction to produce an oxide and an alkene. Data: 173 mg Methyl Acetate added 76 mg Nitrobenzaldehyde Added- Yellow crystals 100mg silica gel added- white powder After the microwave, product had turned into a caramel color, powdery mixture. Theoretical Yield: 173 Mg Percent Yield: 57.97% Melting Point: 49.3-52.4 ° C Discussion: The 2 alkene isomers formed in the reaction are E and Z isomers. By looking at the NMR spectra of the product, you can see that there are smaller peaks with smaller integration values. This shows that although both isomers were produced, one was made in greater quantities. By simply looking at the 2 structures of the products, I can assume that the E alkene was produced because it has less steric hindrance than the Z alkene.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
By performing the reaction in silica gel, you can ensure a better mixing between the product and the silica gel, resulting in better separation between the formed products. This results in better separation between the mixed products.
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.
Ask a homework question - tutors are online