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17) Which one of the following has a Amax in its UV-visible spectrum with the longest wavelength A) C) B) D)

17) Which one of the following has a Amax in its UV-visible spectrum with the longest wavelength A) C) B) D)

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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**Question 17:** Which one of the following has a λ_max in its UV-visible spectrum with the longest wavelength? **Options:** **A)** A conjugated system with three double bonds. **B)** Two conjugated double bonds followed by a single bond and a double bond. **C)** A conjugated system with three double bonds, each separated by a single bond. **D)** Four conjugated double bonds. **Explanation:** The options illustrate various conjugated systems. In UV-visible spectroscopy, the extent of conjugation typically affects the maximum wavelength (λ_max). More conjugated systems generally have longer λ_max values due to lower energy transitions.
Transcribed Image Text:**Question 17:** Which one of the following has a λ_max in its UV-visible spectrum with the longest wavelength? **Options:** **A)** A conjugated system with three double bonds. **B)** Two conjugated double bonds followed by a single bond and a double bond. **C)** A conjugated system with three double bonds, each separated by a single bond. **D)** Four conjugated double bonds. **Explanation:** The options illustrate various conjugated systems. In UV-visible spectroscopy, the extent of conjugation typically affects the maximum wavelength (λ_max). More conjugated systems generally have longer λ_max values due to lower energy transitions.
Expert Solution
Step 1

The compound which has maximum Double bond in conjugation has the highest lambda- max in its UV-visible spectrum with longest wavelength.

  • As the amount of conjugation increases the energy of a compound decreases.
  • We know that the wavelength is inversely proportional to the energy.
  • So the compound with lowest energy will have longest wavelength.
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