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Exercise: Formation of carboxamides

Exercise

In the direct reaction of a carboxylic acid with an amine, first, ...

Please make a choice.

Please make a choice.

correct

wrong

partly correct

This is the right answer

... a carbenium ion is formed.

No, sorry.

... a metal complex is formed.

Sorry, that is wrong. How would the metal be generated??

... a black gas is generated.

No, sorry.

... an ester is formed.

Sorry, that is not correct.

... an ammonium salt is formed.

That is correct!

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Exercise

What is the result of the application of reagents such as dicyclohexylcarbodiimide (DCC) in carboxamide synthesis?

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Please make a choice.

correct

wrong

partly correct

This is the right answer

The poor leaving group water (hydroxy group) is exchanged for a good leaving group.

Well-done. That is correct!

Nothing.

Funny answer. Why is DDC applied in carboxamide synthesis, when nothing is achieved by it?

The good leaving group water is exchanged for a poorer leaving group. Thus, the compound becomes more stable.

Sorry, that is not correct.

This way, the product has a nice yellow colour.

No, this answer is obviously rubbish.

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