Module 6: Chapter 27 (Amines, Amino Acids and Polymers) Flashcards Preview

A-Level OCR Chemistry > Module 6: Chapter 27 (Amines, Amino Acids and Polymers) > Flashcards

Flashcards in Module 6: Chapter 27 (Amines, Amino Acids and Polymers) Deck (67)
Loading flashcards...
1

What are amines?

Organic compounds based on ammonia where 1 or more ammonia H-atoms have been replaced by a carbon chain or ring

2

What are aliphatic amines?

Have straight or branched carbon chains, or non aromatic rings joined to the N-atom e.g. H-(H-)N-CH3

3

What are aromatic amines?

Have at least one aryl group (aromatic ring) attached to the N-atom, e.g. a benzene ring

4

What is the ammonia molecule?

NH3
- pyramidal
- bond angle of 107 degrees (lone pair repels more than the bonded pairs)

5

What is a primary amine?

An organic compound with an N atom bonded to 1 alkyl or aryl groups

6

What is a secondary amine?

An organic compound with an N atom bonded to 2 alkyl or aryl groups

7

What is a tertiary amine?

An organic compound with an N atom bonded to 3 alkyl or aryl groups

8

How do you name primary amines when the -NH2 is at the END of the chain?

Alkyl group as the prefix and "-amine" as the suffix

9

What is the systematic name for CH3NH2?

Methylamine

10

What is the systematic name for CH3CH2CH2NH2?

Propylamine

11

What is the systematic name for C6H5NH2?

Phenylamine

12

How do you name primary amines when the -NH2 is NOT at the end of the chain?

'placement of NH2 in carbon chain - amino' as the prefix and the name of the longest carbon chain as an alkane as the suffix

13

What is the systematic name for CH3CH2CH(NH2)CH3?

2-aminobutane

14

What is the systematic name for H2NCH2CH2CH2CH2NH2?

1,4-diaminobutane

15

What is the systematic name for CH3CH2CH(NH2)CH2NH2?

1,2-diaminobutane

16

How do you name secondary amines with one -NH group?

Di-alkyl group as prefix and then 'amine as suffix

17

How you name tertiary amines with one N?

Tri-alkyl group as a prefix and then 'amine' as a suffix

18

What is the systematic name for (CH3CH2CH2)2N-H?

Dipropylamine

19

What is the systematic name for (C6H5)2N-H?

Diphenylamine

20

What is the systematic name for (CH3CH2CH2)3N?

Tripropylamine

21

What is the systematic name for (C6H5)3N?

Triphenylamine

22

How do you name secondary and tertiary amines with mixed R groups?

- giving the longest carbon chain the suffix of amine (e.g. propylamine)
- giving the shorter chain(s) as N-prefix in alphabetical order (e.g. N-ethyl-N-methyl)

N-ethyl-N-methylpropylamine

23

What is the ionic equation of ammonia being added to an acid?

NH3 + H+ -> NH4+

24

What is the shape of an ammonium ion?

Tetrahedral
109.5 bond angle

25

Why are amines useful bases?

The lone pair of electrons on the N atom can be used to accept protons (proton acceptors)

26

Show the reaction of methylamine and hydrochloric acid?

CH3NH2 + HCl -> CH3NH3+Cl-
methylammonium chloride is made (a salt)

27

Show the reaction of dimethylamine and sulfuric acid?

2(CH3)2NH2 + H2SO4 -> ((CH3)2NH3+)2SO4^2-
dimethylammonium sulfate is formed (salt)

28

Show the reaction of 1,2-diaminoethane and nitric acid (in excess)?

NH2CH2CH2NH2 + HNO3 -> NO3^-(+H3NCH2CH2NH3+)NO3^-
1,2-diammoniumethane dinitrate

29

How do you make primary amines?

Ammonia can react as a nucleophile to replace the halogen on a haloalkane with the -NH2 group

30

What is a nucelophile?

An electron pair DONOR