Assignment:
Q1. In the experiment, ligroin may be used as a solvent for the separation of the product from biphenyl.
a. What is ligroin?
b. Can you suggest an alternative solvent that might be used in this step?
Q2. Consider the same reaction as in the previous question except that in this case it is carried out with ethyl benzoate. What product would be expected in this case?
Q3. Grignard reagents may be used to prepare other organometallic reagents, for example, ethylmagnesium bromide reacts with cadmium chloride to yield diethylcadmium.
2 CH3CH2MgCI + CdCI2 (CH3CH2)2Cd + 2 MgCI2
Indicate the product of the following reactions and name the organometallic product.
4 CH3MgCI + SiCI4 2 C6HsMgCI + HgCI2
Q4. para-Nitrobenzaldehyde reacts at a faster rate than benzaldehyde in the Perkin reaction while p-N,N-dimethylaminobenzaldehyde is much less reactive toward the same nucleophile. Explain.
Q5. It is likely that the amount of Grignard reagent your analysis indicates was formed is greater than the amount of Grignard reagent actually present just before you added water. Explain.
Provide complete and step by step solution for the question and show calculations and use formulas.