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5. The structure of anthocyanin, a naturally occurring compound that acts as a pigment in many fruits and vegetables, is given below. At low pH values (<3), it exists as the cation shown below and exhibits a bright red color. At higher pH values (-7), it exhibits a purple-ish color, indicating a shift to a longer wavelength absorption in the UV-visible spectrum. As the pH is raised from pH 3 to pH 7, one of the hydroxyl groups can be deprotonated (the H that is removed has been circled for you) to produce the corresponding resonance stabilized neutral compound. Draw the two most stable Lewis octet resonance structures for this anthocyanin at pH 7. Make sure to explicitly show all non-bonding lone pairs and formal charges where appropriate. Include curved arrows to show how you got from the first resonance structure to the other. 5. :: :: 0:0 OH O-[sugar] anthocyanidin structure at pH 3 red color compound (H (H+) first structure here second structure here -

5. The structure of anthocyanin, a naturally occurring compound that acts as a pigment in many fruits and vegetables, is given below. At low pH values (<3), it exists as the cation shown below and exhibits a bright red color. At higher pH values (-7), it exhibits a purple-ish color, indicating a shift to a longer wavelength absorption in the UV-visible spectrum. As the pH is raised from pH 3 to pH 7, one of the hydroxyl groups can be deprotonated (the H that is removed has been circled for you) to produce the corresponding resonance stabilized neutral compound. Draw the two most stable Lewis octet resonance structures for this anthocyanin at pH 7. Make sure to explicitly show all non-bonding lone pairs and formal charges where appropriate. Include curved arrows to show how you got from the first resonance structure to the other. 5. :: :: 0:0 OH O-[sugar] anthocyanidin structure at pH 3 red color compound (H (H+) first structure here second structure here -

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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5. The structure of anthocyanin, a naturally occurring compound that acts as a pigment in many fruits and vegetables, is given below. At low pH values (<3), it exists as the cation shown below and exhibits a bright red color. At higher pH values (-7), it exhibits a purple-ish color, indicating a shift to a longer wavelength absorption in the UV-visible spectrum. As the pH is raised from pH 3 to pH 7, one of the hydroxyl groups can be deprotonated (the H that is removed has been circled for you) to produce the corresponding resonance stabilized neutral compound. Draw the two most stable Lewis octet resonance structures for this anthocyanin at pH 7. Make sure to explicitly show all non-bonding lone pairs and formal charges where appropriate. Include curved arrows to show how you got from the first resonance structure to the other. 5. :: :: HO 0:0 : ÖH :O: -[sugar] anthocyanidin structure at pH 3 red color compound (H+) first structure here second structure here 1 -
Transcribed Image Text:5. The structure of anthocyanin, a naturally occurring compound that acts as a pigment in many fruits and vegetables, is given below. At low pH values (<3), it exists as the cation shown below and exhibits a bright red color. At higher pH values (-7), it exhibits a purple-ish color, indicating a shift to a longer wavelength absorption in the UV-visible spectrum. As the pH is raised from pH 3 to pH 7, one of the hydroxyl groups can be deprotonated (the H that is removed has been circled for you) to produce the corresponding resonance stabilized neutral compound. Draw the two most stable Lewis octet resonance structures for this anthocyanin at pH 7. Make sure to explicitly show all non-bonding lone pairs and formal charges where appropriate. Include curved arrows to show how you got from the first resonance structure to the other. 5. :: :: HO 0:0 : ÖH :O: -[sugar] anthocyanidin structure at pH 3 red color compound (H+) first structure here second structure here 1 -
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