Aldehydes and Ketones - What Are Grignard Reagents, and How Do They React with Aldehydes and Ketones?

8 important questions on Aldehydes and Ketones - What Are Grignard Reagents, and How Do They React with Aldehydes and Ketones?

What are organometallic compounds?

A compound containing a carbon-metal bond.

What is a Grignard reagent?

An Organomagnesium compound of the type RMgX or ArMgX.

How are Grignard reagents prepared?

By slow addition of a halide to a stirred suspension of magnsium metal in an ether solvent. Or in the case of aryl Grignards are prepared in a similar way as shown in the picture.
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How is the carbon-magnesium bond best described?

As a polar covalent bond with carbon bearing the partial negative charge.

What is a carbanion?

An anion in which the carbon has an unshared electron pair and a negative charge.

Why do Grignard reagents react so readily to form alkanes?

Grignard reagents are very strong bases and thus react with a wide variety of acids to form alkanes.

What is the special value of Grignard reagents?

They provide excellent ways to create new carbon-carbon bonds.

What product do you get when combining a formaldehyde with a Grignard reagent?

This reaction gives a 1o alcohol.

The question on the page originate from the summary of the following study material:

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