Zumdahl Chemistry Chapter 20 (Organic Chemistry) Day 3

Naming Alkenes & Alkynes: Organic Compounds Day 3

Describe the naming conventions for alkenes and alkynes based on alkanes.

Alkenes and alkynes are named similarly to alkanes, with the suffix -ene for alkenes and -yne for alkynes.

What is the defining characteristic of unsaturated hydrocarbons?

Unsaturated hydrocarbons have at least one double or triple bond between carbon atoms.

Define the naming rule for specifying the position of the double bond in longer chain alkenes.

The double bond must have the lowest possible number while making the longest possible parent chain.

Do double bonds or branches take priority in naming alkenes?

Double bonds take priority over branches in naming alkenes.

How should the position of the triple bond be specified in longer chain alkynes?

The triple bond must have the lowest number in naming alkynes.

What takes priority when a structure has both a double and triple bond?

Alkenes take priority over alkynes in naming; the double bond is named first.

Describe the naming process for structures with both double and triple bonds.

Use the same rules as for alkenes, naming the triple bond as an 'afterthought'; the double bond must have the lowest possible number.

How are alkenes and alkynes named in terms of suffixes?

Alkenes end in -ene while alkynes end in -yne.

Define the rule for naming alkenes with a double bond.

The position of the double bond must be specified for longer chains, with the lowest possible number.

Do alkynes or alkenes take priority in naming when both are present in a structure?

The position of the double bond must be specified for longer chains, with the lowest possible number.

Describe the naming convention for alkynes in terms of prefixes.

The prefixes for alkynes are the same as for alkanes.