Interchapter B - Naming Alkenes, Alkynes, and Benzene

when naming alkenes, what do you replace the parent suffix with? what does this indicate

-ene; presence of a double bond

true or false: the double bond receives highest priority for lowest number regardless of any substituents present?

true

true or false: the position of the double is indicated using both locants designating the C’s of the multiple bond

false; only the lowest one

when naming alkynes, what do you replace the parent suffix with? what does this indicate?

-yne; triple bond

what to do if the locator numbers of alkene or alkyne carbons are not affected by which one is C1

now give the substituent the lowest locant

multiple multiple bonds?

use a suffix and add an “a” at the end of the prefix

what does “enyne” represent?

the presence of double and triple bonds

what is the common name for this structure?

ethene

common name?

propene

common name?

methylpropene

common name?

ethyne

common name for this substituent?

vinyl

common name for this substituent?

allyl

common name for this subst.?

propargyl

what does ortho- indicate?

1,2 positioning of subst. on benzene

what does meta- indicate?

1,3 positioning of subst. on benzenewh

what does para- indicate?

1,4 positioning of subst. on benzene

trivial name?

toluene

trivial name?

anisole (methoxy benzene)

trivial name?

cumene (isopropylbenzene)

trivial name?

styrene (vinylbenzene)

when would you have a Z configuration about a double bond?

when the two highest priority substituents are on the side of the double bond

when would you have an E configuration about a double bond?

when the two highest priority subst. are on opposite sides of the double bond