a. Use a greater amount of Ethyl Acetate in relation to the amount of Hexane until the Rf is 0.5
b. Use a greater amount of Hexane in relation to the amount of Ethyl Acetate until the Rf is 0.5
c. Rf value of 0.25 is fine as the product of this reactions the product will be more non-polar than the starting material and will travel further up the TLC plate
d. Let the TLC run longer
The NMR data giving for the product is as follows:
If you ran the NMR in d-DMSO and see an additional peak at 1.76ppm and 3.60ppm, what do these peaks represent.
a. Residue THF impurity, as THF was used as a solvent in the reaction
b. Allyl Bromide Statring Material
c. Benzaldehyde Statring Material
d. water impurity as water was used as a solvent in the reaction
e. These resonances representatives the protons of ammonium chloride which was used in the reaction
This paper states this addition of an allyl halide to a aldehyde is a "Grignard-Like" reaction. Although, traditionally reactions using allyl halides and zinc to perform carbon-carbon bond formation are known as the Barbier Reaction