L6 - functional groups

Question 1

what is a thiol

Answer 1

functional group of a sulphur atom and a hydrogen atom.
referred to as thiol, sulfhydryl, mercaptans

Question 2

how are disulphide bonds formed

Answer 2

when two thiol groups of cystines meet

Question 3

BP of ethers

Answer 3

between alkanes and alcohols

Question 4

amines physical properties

Answer 4

the number of hydrogen bonds that an amine can make, affects the boiling point (+ solubility). solubility of amines is ordered P>S>T

Question 5

amides physical properties

Answer 5

can form hydrogen bonds
primary amide = 2H bonds
secondary = 1H bond
tertiary = 0H bonds

Question 6

guanidinum group

Answer 6

-cation with a high pKa and is a strong base
-the conjugation and consequent charge dislocation enables formation of multiple hydrogen bonds
-Is the functional group in arginine

Question 7

amide bp

Answer 7

high (higher than alkenes, alcohols, carboxylic acids)

Question 8

which amino acid isomer is found in proteins

Answer 8

L