Organic Chemistry II - Lab 8 - Grignard Reaction Synthesis

At the beginning of week 2 in the Grignard procedure, why is 6 HCl added to the beaker containing the reaction product from week 1?

To convert the benzoate salt into benzoic acid

Identify characteristics that describe a Grignard Reagent.

1. Basic 2. Nucleophile

Consider the charge distribution of a Grignard Reagent. There i a partial __________ charge on Mg--X, where X is a halogen, and a partial _______ charge on the adjacent carbon.

1. Positive 2. Negative

A Grignard reagent is prepared when _____________ reacts with ______________ in the solvent _______________ .

1. an organohalide 2. Magnesium 3. Ether

A Grignard Synthesis begins with a 6.00g of bromobenzene and ends with 3.91g benzoic acid. What is the percent yield of the benzoic acid? Assume all other reagents are in excess.

83.9%

The analytical method used to confirm the structure and functional groups of the product

IR spectroscopy

How will you determine the amount of carbon dioxide that reacts in the Grignard Reaction?

It is not necessary to determine the exact mass since it is in excess.

The quick, numeric analysis used to characterize the product and assess the purity.

Melting Point

Which substance would not work as a Grignard Reagent?

Methylcalcium Bromide

In the experimental procedure, which step is made easier through the application of ultrasonic waves?

Preparation of the Grignard Reagent

The technique used to separate the pure product from any excess reagent, impurities, and byproducts

Recrystallization

Which key feature is formed in a Grignard Reaction?

Carbon - Carbon bond