1.2 Alkenes and Alkynes

Unsaturated

Alkenes and Alkynes are considered ___________.

double

Alkenes contain at least one ______ bond

triple

Alkynes contain at least one ________ bond

Stereoisomers

Molecules that have the same chemical formula and structural backbone but have a different arrangement of atoms

Cis

____ isomers have matching alkyl groups located on the same side of the double bond

Trans

____ isomers have the same groups located on opposite sides of the double bond

Halogenation

Reactions of Alkenes:
Adding halides
ex. Alkene + halogen

Hydrogenation

Reactions of Alkenes:
Adding hydrogen

ex. Alkene + hydrogen

hydrohalogenation

Reactions of Alkenes:
Adding hydrogen halides

ex. Alkene + Hydrogen halide

Hydration

Reactions of Alkenes:
Adding water

ex. Alkene + water

Markovnikov’s rule

What rule states that the hydrogen is added to the carbon with the most hydrogen atoms originally bonded to it?

halogenation

Reactions of Alkynes

Adding halides

Alkyne + 2 halogens → Haloalkane

Alkyne + 1 halogen → Haloalkene