The amino acid arginine (Arg, R) exists at pH = 7.4 as the following structure:
a. The cation in the side chain is resonance stabilized. Complete the description of the resonance hybrid in the diagram above by drawing two other resonance structures and the curved-arrow notation used to derive them. (You can draw just the relevant part of the side chain.) Show all charges and unshared pairs!
b. Select the one true statement:
(1) Resonance makes this form of the amino acid a stronger base than it would be in the absence of such resonance.
(2) Resonance makes this form of the amino acid a weaker base than it would be in the absence of such resonance.
(3) Resonance makes this form of the amino acid a weaker acid than it would be in the absence of such resonance.
(4) Resonance makes this form of the amino acid a stronger acid than it would be in the absence of such resonance.

Question

The amino acid arginine (Arg, R) exists at pH = 7.4 as the following structure:
  a. The cation in the side chain is resonance stabilized. Complete the description of the resonance hybrid in the diagram above by drawing two other resonance structures and the curved-arrow notation used to derive them. (You can draw just the relevant part of the side chain.) Show all charges and unshared pairs!
b. Select the one true statement:
(1) Resonance makes this form of the amino acid a stronger base than it would be in the absence of such resonance.
(2) Resonance makes this form of the amino acid a weaker base than it would be in the absence of such resonance.
(3) Resonance makes this form of the amino acid a weaker acid than it would be in the absence of such resonance.
(4) Resonance makes this form of the amino acid a stronger acid than it would be in the absence of such resonance.

Quizplus · Accepted Answer

The Answer of The amino acid arginine (Arg, R) exists at pH = 7.4 as the following structure:
  a. The cation in the side chain is resonance stabilized. Complete the description of the resonance hybrid in the diagram above by drawing two other resonance structures and the curved-arrow notation used to derive them. (You can draw just the relevant part of the side chain.) Show all charges and unshared pairs!
b. Select the one true statement:
(1) Resonance makes this form of the amino acid a stronger base than it would be in the absence of such resonance.
(2) Resonance makes this form of the amino acid a weaker base than it would be in the absence of such resonance.
(3) Resonance makes this form of the amino acid a weaker acid than it would be in the absence of such resonance.
(4) Resonance makes this form of the amino acid a stronger acid than it would be in the absence of such resonance.

The Amino Acid Arginine (Arg, R) Exists at PH =