CHP 2: CHEM 2443

This compound is a tertiary amine. Et is an abbreviation for ethyl and there are three identical ethyl groups bonded to the nitrogen. This matches notation A.

This compound is a tertiary amine. Me is an abbreviation for methyl, Et is an abbreviation for ethyl and 𝑖Pr is an abbreviation for isopropyl. They will be three different R groups, so this structure will not fit any of the notations.

The amine is part of a ring, and both carbons that are bonded to the nitrogen are bonded to the same groups, so they are identical. This matches notation B.

This compound is a secondary amine. Me is an abbreviation for methyl and Et is an abbreviation for ethyl. There are two different R groups, so this structure will not fit any of the notations.

This compound is a primary amine. The nitrogen is bonded to an isopropyl group and two hydrogens, so it matches notation C.

when octane is added to a beaker of water it:

forms a separate layer on top of the water

octane is what? at room temp?

liquid

propane is what? at room temp?

gas

octane is a what? molecule

nonpolar

propane is a what? molecule

nonpolar

identify the C6H14 isomer with the highest melting point (celsius)

Branching in a hydrocarbon lowers the melting point relative to the straight‑chain compound. Therefore the straight‑chain hydrocarbon will have the highest melting point at −95°C.

what newman projection is the most stable?

staggered

the WHAT gauche interactions, the more stable the newman projections

less

how many gauche interactions are in the newman projection at 180 degrees

2

how many gauche interactions are in the newman projection at 300 degrees

3

what is the most stable staggered conformation

180 degrees

alkanes

each C is bonded to four other C or H atoms. carbons are sp³ hybridized

alkenes

one or more c double bonds. carbons of the carbon double bond are sp² hybridized

alkynes

one or more c triple bonds. carbons of the c triple bond are sp hybridized

aromatic hydrocarbons

hydrocarbons that contain a benzene ring

methane

CH4. 1 carbon

ethane

C2H6. 2 carbons

propane

C3H8. 3 carbons

butane

C4H10. 4 carbons

pentane

C5H12. 5 carbons

hexane

C6H14. 6 carbons

heptane

C7H16. 7 carbons

octane

C8H18. 8 carbons

nonane

C9H20. 9 carbons

decane

C10H22. 10 carbons

the longer the carbon chain gets means what?

higher melting and boiling point

cycloalkanes

alkanes with carbon chains in closed loops or rings

cycloalkanes have fewer what?

fewer H’s

alkanes formula

CnH2n+2

cycloalkanes formula

CnH2n

cyclopropane

cyclobutane

cyclopentane

cyclohexane

if two chains are equal in length select the one with the:

most substituents

methyl (me)

1 carbon

ethyl (et)

2 carbons

propyl (pr)

3 carbons

butyl (bu)

4 carbons

isopropyl

(CH3)2CH—

isobutyl

(CH3)2CHCH2—

sec-butyl

tert-butyl

(CH3)3C—

neopentyl

(CH3)3CCH2—