Chem 4:7 - Amines Flashcards
How are amines derivatives of ammonia?
One or more of the H replaced by alkyl or aryl group.
Amines reactivity?
Very
What do the primary secondary and tertiary names indciate
How many substituents on the N group.
What are the shape of primary amines?
Amines keep the pyramidal shape but have a lone pair repelling the substituents
Can H bond to eachother but H bonds not as strongas oxygen.
What is the solubility of amines like?
V soluble in alcohols and water bc can form H bonds
Most amines more soluble in less polar substances
Boiling points of primary amines?
Amines BP lower than alcohol
What state are shorter chain amines
?
gases at room temp
what state are longer chain amines
volatile liquids.
Amines has a lone pair, therefore what can it do
?
- Act as base , aceepting a proton
- Bond with electron deficient carbon , acting as a nucleophile
When amine acts as a nucleophilem what happens to the nitrogen
it gains a positive charge
When amines act as bases, reacting with acids , what do they form ?
Salts
What will phenyl amine dissolve in
Excess HCL
look at flashcard
What does the strength of a base depend on ?
how readily it accepts an H+ ion
What is the inductive affect
Alkyl and aryl groups release e’s away from them therefore torwards the Nitrogen
This makes them better electron par donor
- amines are better than ammonia
why are 2ndary bases better than primary
because they have 2 inductive effects
