Many of the colours of vegetation are due to electronic transit ions in conjugated π-electron systems. In the freeelectron molecular orbital (FEMO) theory. the electrons in a conjugated molecule are treated as independent particles in a box of length L. (a) Sketch the form of the two occupied orbitals in butadiene predicted by this model and predict the minimum excitation energy of the molecule. (b) In many cases. an extra half bond-length is often added at each end of the box. The tetraene CH2=CHCH=CHCH=CHCH=CH2 can therefore be t reated as a box of length 8R. where R = 140 pm. Ca lcu late the minimum excitation energy of the molecule and sketch the HOMO and LUMO.
Many of the colours of vegetation are due to electronic transit ions in conjugated π-electron systems. In the freeelectron molecular orbital (FEMO) theory. the electrons in a conjugated molecule are treated as independent particles in a box of length L. (a) Sketch the form of the two occupied orbitals in butadiene predicted by this model and predict the minimum excitation energy of the molecule. (b) In many cases. an extra half bond-length is often added at each end of the box. The tetraene CH2=CHCH=CHCH=CHCH=CH2 can therefore be t reated as a box of length 8R. where R = 140 pm. Ca lcu late the minimum excitation energy of the molecule and sketch the HOMO and LUMO.
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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Many of the colours of vegetation are due to electronic transit ions in conjugated π-electron systems. In the freeelectron molecular orbital (FEMO) theory. the electrons in a conjugated molecule are treated as independent particles in a box of length L. (a) Sketch the form of the two occupied orbitals in butadiene predicted by this model and predict the minimum excitation energy of the molecule. (b) In many cases. an extra half bond-length is often added at each end of the box. The tetraene CH2=CHCH=CHCH=CHCH=CH2 can therefore be t reated as a box of length 8R. where R = 140 pm. Ca lcu late the minimum excitation energy of the molecule and sketch the HOMO and LUMO.
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