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11 Nov 2019
Physical chemistry problem
#5 (30pts) Use the free electron model(s) discussed in class to predict the wavelength and frequency at which I β carotene will absorb radiation when it goes from the HOMO to the LUMO. No α term is to be used, and assume that there is a 0.3 x average bond length overshoot at each end of the chain (a) 10pts.Assume that the carbon-carbon bond lengths along the chain are all of the same length and equal to 140 pm. (b) 10pts. The carbon-carbon bonds alternate between double and single bonds of lengths 134 pm and 154 pm respectively. No α term is to be used, and assume that there is a 0.3 x average bond length overshoot at each end of the chain. (c) 10pts) when I β carotene is oxidized in vivo it forms two molecules of retinal. The structure of retinal is Assuming the model used in part (a) with no alpha term and the same overshoot calculate The wave length of the of the radiation when it goes from the HOMO to the LUMO
Physical chemistry problem
#5 (30pts) Use the free electron model(s) discussed in class to predict the wavelength and frequency at which I β carotene will absorb radiation when it goes from the HOMO to the LUMO. No α term is to be used, and assume that there is a 0.3 x average bond length overshoot at each end of the chain (a) 10pts.Assume that the carbon-carbon bond lengths along the chain are all of the same length and equal to 140 pm. (b) 10pts. The carbon-carbon bonds alternate between double and single bonds of lengths 134 pm and 154 pm respectively. No α term is to be used, and assume that there is a 0.3 x average bond length overshoot at each end of the chain. (c) 10pts) when I β carotene is oxidized in vivo it forms two molecules of retinal. The structure of retinal is Assuming the model used in part (a) with no alpha term and the same overshoot calculate The wave length of the of the radiation when it goes from the HOMO to the LUMO
Hubert KochLv2
17 Jun 2019