Unit 4 Amino Acids and Amides PA
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Name the molecule CH3NH2
Methylamine
O || H-N-CH2-C-O-H Give the IUPAC name of this amino acid
2-amino ethanoic acid
Draw the structure of 2-amino 3-methyl butanoic acid
O || H2N-CH-C-O-H | CH(CH3) | CH3
What type of ion is an amino acid at neutral pH?
Zwitterion
What is a chain of amino acids called?
A Polypeptide or Protein
Name O H II I CH3-C-N-CH3
N-Methylethanamide
What is the strongest type of intermolecular forces between amide molecules? Between what do these occur?
Hydrogen bonding Between the lone pair of electrons on the O and the hydrogen attached to the amide group
Name the two reagents used to convert amides into amines
1) H2O 2) LiAlH4
What type of reaction results in a peptide bond?
Condensation reaction
What property causes optical isomerism to occur in most amino acids? On which atom in the molecule is this? O II H2N- CH-C-OH I R
A chiral carbon, marked with a * O II H2N- C*H-C-OH I R
Give the IUPAC name of the only amino acid which does not exist as a pair of optical isomers. What is the R group of this molecule?
Aminoethanoic acid The R group is a H atom
what is the general reaction for the production of an amide using a primary amine?
Carboxylic Acid + Amine –> Amide + H20
Are amides soluble in water?
Short chain amides are soluble because they can form Hydrogen bonds with water molecules.