Mechdude
Apr18-10, 01:34 PM
1. The problem statement, all variables and given/known data
consider butadiene H_2 C = CH-CH=cH_2 and assume for simplicity that \pi electrons move on a straight line (one -dimensional box) whose length l can be estimated as equal to two C=C bond lengths (2*1.35 angstrom) , plus one C-C lengths. Butadiene has four \pi that fill the n=1 & n=2 . the transition observed in a UV/VIS spectrum thus corresponds to the exitationof ane electron from the n = 3 state. Experimentally one finds that this corresponds to the absorption of light with a wavelengths of 217 nm. Compute and compare the lenghts of the 0ne-D box suggested by the sum of the bond length and by the energy of the transition.
2. Relevant equations
not sure
3. The attempt at a solution
not sure
1. The problem statement, all variables and given/known data
2. Relevant equations
3. The attempt at a solution
consider butadiene H_2 C = CH-CH=cH_2 and assume for simplicity that \pi electrons move on a straight line (one -dimensional box) whose length l can be estimated as equal to two C=C bond lengths (2*1.35 angstrom) , plus one C-C lengths. Butadiene has four \pi that fill the n=1 & n=2 . the transition observed in a UV/VIS spectrum thus corresponds to the exitationof ane electron from the n = 3 state. Experimentally one finds that this corresponds to the absorption of light with a wavelengths of 217 nm. Compute and compare the lenghts of the 0ne-D box suggested by the sum of the bond length and by the energy of the transition.
2. Relevant equations
not sure
3. The attempt at a solution
not sure
1. The problem statement, all variables and given/known data
2. Relevant equations
3. The attempt at a solution