practice-test-2-koofer-A

practice-test-2-koofer-A - Butadiene is the simplest...

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Butadiene is the simplest polyene. It has 4 carbon atoms and 4 electrons in the pi cloud. a) Use the particle-in-a-box model to calculate the wavelength of the photon that you need to shine in this molecule to produce excite 1 electron from the highest occupied pi orbital to the lowest unoccupied pi orbital. b) Use the particle-in-a-box model to calculate the wavelength of the photon that you need to shine in this molecule in order to produce the excitation of 1 electron from the highest occupied pi state to the second lowest unoccupied pi state.
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Arrange the orbitals of the hydrogen atom in order of increasing energy (decreasing stability) up to the 4p orbital. (b) Do the same for a multielectronic atom (c ) Explain to the fullest possible extent the difference in the order of the energies. In particular, focus on the 2s and 2p orbitals. (To obtain a perfect score, you would need to draw the radial distribution functions of these two orbitals, and connect them with your explanation of their difference in energies)
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3.- Valence-bond theory vs Molecular-orbital theory 3.a) Describe the bonding in CN using Molecular-Orbital theory (You must draw the MO
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practice-test-2-koofer-A - Butadiene is the simplest...

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