Formation of phenylmagnesium bromide:
Phenylmagnesium bromide and methyl benzoate reaction:
Procedure: Procedure in lab manual should be sufficient.
The Grignard Reaction
|Reagents |MW (g/mol) |Amount used |Lit. Melting Point |Mol used |Mol equivalent | | | | |((c) | | | |Bromobenzene |157.02 g/mol |3.20 g |-30.8°C |.0204 mol |1 | |Methyl Benzoate |136.15 g/mol |1.27 mL |-12.8°C |.0100 mol |1 | |Magnesium |24.10 g/mol |.604g |650°C |.0255 mol |1.25 |
|Products |MW (g/mol) |Amount Obtained (g) |% Yield |Lit. Melting Point |Observed Melting Point| | | | | |(°C) |(°C) | |Crude |260.34 g/mol |1.00g |37.6 % |160-163°C |159-161.C | |Recrystallized |260.34 g/mol |.238g |28.8% (% recovered) |160-163°C |160-162°C | |Crude | | | | | |
|Compound |Crude Melting Point (°C) |Recrystallization Melting |% Yield |% Recovery | | | |Point (°C) | | | |Aldehyde |55.2-58°C...