Reactions of Alkenes Flashcards

1
Q

Why are alkenes more reactive than alkanes?

A

Due to the presence of the pie bond. The pie bond is weaker than the sigma bond so it is broken more readily.

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2
Q

What is hydrogenation?

A

The addition reaction in which hydrogen is added across a double bond.

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3
Q

What catalyst and temperature is in a hydrogenation reaction?

A

Nickel catalyst at 423K

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4
Q

What is halogenation?

A

The addition reactions with halogens

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5
Q

How do you test for unsaturation?

A

Add bromine water in drops to sample.
If there is a double carbon bond present the bromine gets added across the double bond.
The orange colour will disappear.

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6
Q

What is formed when alkenes react with gaseous hydrogen halides?

A

Haloalkanes

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7
Q

What is a hydration reaction?

A

When alkenes react with steam (water)

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8
Q

What catalyst is in the presence in the hydration reaction?

A

Phosphoric acid catalyst

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9
Q

What happens in a hydration reaction?

A

Steam is added across the double bond.

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