Hi, wondering if anyone could help with 2 tricky lab questions;
in the experiment, 4-bromomethylbenzoic acid in acetone is added to triphenylphosphine to produce 4-carboxybenzyl triphenyl phosphonium bromide. This is then added to a 37% aqueous formaldehyde solution, 2.5g NaOH in water addedd, the filtrate acidified and the crude product recrystalised with ethanol.
The question is a. Explain why it is possible to generate the yield with aqueous NaOH in this example, and b. If an aldehyde other than formaldehyde were to be used, what would the geometry of the double bond in the product be and why?
Any help would be MUCH appreciated.
Thanks in advance