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The figure below represents the highest occupied molecular orbitals (HOMOS) and the lowest unoccupied molecular orbital (LUMO) for an organic compound with a ketone functional group. The and n orbitals represent the HOMOS and the x* represents the LUMO orbital. E n JI * Nonpolar solvent J Polar solvent H. H H H The left side HOMOS and LUMO represent the molecule in a nonpolar solvent, and the right side represent the HOMOS and LUMD in a polar solvent, such as water. You can see the change in the energy of the HOMOS and LUMO when the polar solvent interacts with the electrons in the aan n orbitals. Study the figure and choose which of the following statements are true or false about why there is a blue shift in the electronic transition. Select all that are True. the energy gap between the n MO and the MO is larger in the polar solvent than in the nonpolar solvent, so the photon needed to excite the electron would require more energy when the molecule is in the polar solvent the energy gap between the n MO and the MO is smaller in the polar solvent than in the nonpolar solvent, so the photon needed to excite the electron would require more energy when the molecule is in the polar solvent the polar solvent forms an H-bond with the non-polar bond electrons and lowers the energy of the MO much more than the * MO is lowered HOMO more than the a* LUMO MO much more than the x MO is lowered a manipolar solvent would have an extensive interaction with the banding electrons and lower the energy of the the polar solvent forms an H-bond with the polar nonbonding electrons in the n MO and lowers the energy of the it makes sense that a polar solvent would form a strong attraction for the electrons in a nonbonding orbital on the end of a very polar C-0 band; stronger IM forces mean lower energy for the n-electrons

The figure below represents the highest occupied molecular orbitals (HOMOS) and the lowest unoccupied molecular orbital (LUMO) for an organic compound with a ketone functional group. The and n orbitals represent the HOMOS and the x* represents the LUMO orbital. E n JI * Nonpolar solvent J Polar solvent H. H H H The left side HOMOS and LUMO represent the molecule in a nonpolar solvent, and the right side represent the HOMOS and LUMD in a polar solvent, such as water. You can see the change in the energy of the HOMOS and LUMO when the polar solvent interacts with the electrons in the aan n orbitals. Study the figure and choose which of the following statements are true or false about why there is a blue shift in the electronic transition. Select all that are True. the energy gap between the n MO and the MO is larger in the polar solvent than in the nonpolar solvent, so the photon needed to excite the electron would require more energy when the molecule is in the polar solvent the energy gap between the n MO and the MO is smaller in the polar solvent than in the nonpolar solvent, so the photon needed to excite the electron would require more energy when the molecule is in the polar solvent the polar solvent forms an H-bond with the non-polar bond electrons and lowers the energy of the MO much more than the * MO is lowered HOMO more than the a* LUMO MO much more than the x MO is lowered a manipolar solvent would have an extensive interaction with the banding electrons and lower the energy of the the polar solvent forms an H-bond with the polar nonbonding electrons in the n MO and lowers the energy of the it makes sense that a polar solvent would form a strong attraction for the electrons in a nonbonding orbital on the end of a very polar C-0 band; stronger IM forces mean lower energy for the n-electrons

Organic Chemistry: A Guided Inquiry
Organic Chemistry: A Guided Inquiry
2nd Edition
ISBN:9780618974122
Author:Andrei Straumanis
Publisher:Andrei Straumanis
Chapter17: Conjugation And Molecular Orbital (mo) Theory
Section: Chapter Questions
Problem 15E
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The figure below represents the highest accupied molecular orbitals (HOMOS) and the lowest unoccupied molecular orbital (LUMO) for an organic compound with a ketone functional group. The and n orbitals represent the HOMOS and the a* represents the LUMO orbital. л" E I Nonpolar solvent I* Л Polar solvent To The left side HOMOS and LUMO represent the molecule in a nonpolar solvent, and the right side represent the HOMOS and LUMD in a polar solvent, such as water. You can see the change in the energy of the HOMOS and LUMO when the polar solvent interacts with the electrons in the ann orbitals. Study the figure and choose which of the following statements are true or false about why there is a blue shift in the electronic transition. Select all that are True. the energy gap between the n MO and the n* MO is larger in the polar solvent than in the nonpolar solvent, so the photon needed to excite the electron would require more energy when the molecule is in the polar solvent the energy gap between the n MO and the * MO is smaller in the polar solvent than in the nonpolar solvent, so the photon needed to excite the electron would require more energy when the molecule is in the polar solvent the polar solvent forms an H-bond with the non-polar bond electrons and lowers the energy of the x MO much more than the * MO is lowered a nanpolar solvent would have an extensive interaction with the bonding electrons and lower the energy of the a HOMO more than the a* LUMO the polar solvent forms an H-bond with the polar nonbonding electrons in the n MO and lowers the energy of the n MO much more than the x* MO is lowered it makes sense that a polar solvent would form a strong attraction for the electrons in a nonbonding orbital on the end of a very polar C=0 band; stronger I forces mean lower energy for the n-electrons
Transcribed Image Text:The figure below represents the highest accupied molecular orbitals (HOMOS) and the lowest unoccupied molecular orbital (LUMO) for an organic compound with a ketone functional group. The and n orbitals represent the HOMOS and the a* represents the LUMO orbital. л" E I Nonpolar solvent I* Л Polar solvent To The left side HOMOS and LUMO represent the molecule in a nonpolar solvent, and the right side represent the HOMOS and LUMD in a polar solvent, such as water. You can see the change in the energy of the HOMOS and LUMO when the polar solvent interacts with the electrons in the ann orbitals. Study the figure and choose which of the following statements are true or false about why there is a blue shift in the electronic transition. Select all that are True. the energy gap between the n MO and the n* MO is larger in the polar solvent than in the nonpolar solvent, so the photon needed to excite the electron would require more energy when the molecule is in the polar solvent the energy gap between the n MO and the * MO is smaller in the polar solvent than in the nonpolar solvent, so the photon needed to excite the electron would require more energy when the molecule is in the polar solvent the polar solvent forms an H-bond with the non-polar bond electrons and lowers the energy of the x MO much more than the * MO is lowered a nanpolar solvent would have an extensive interaction with the bonding electrons and lower the energy of the a HOMO more than the a* LUMO the polar solvent forms an H-bond with the polar nonbonding electrons in the n MO and lowers the energy of the n MO much more than the x* MO is lowered it makes sense that a polar solvent would form a strong attraction for the electrons in a nonbonding orbital on the end of a very polar C=0 band; stronger I forces mean lower energy for the n-electrons
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