please answer 2b Item 2 Part A atetraene, CH assume that the molecule is linear

Question

please answer 2b

Item 2 Part A atetraene, CH assume that the molecule is linear and use tho values 135 and 154 pu for C C and Calculate the box length, using the particle in the box model for ect C-C bonds Express your answer to four significant figures and include the appropriate units. a 1002 pm Submit My Answers Give Up Correct Part B work in octatetraene, CHn using the particle in the box model Calculate the energy gap between the highest occupied level and the lowest unoccupied level of the r-net Express your answer to three significant figures and include the appropriate units. nits

Explanation / Answer

E= n2h2/8ml2

For octatetrene n=3 (HOMO) to make a transition into the level n=4 (LUMO). Thus energy required is the distance between these energy levels

l = 4(1.35) +4(1.5) = 11.4 x 10-10 m

change energy = (16-9) (6.626 x 10-34)2/(8x 9.1 x10 -31 x (11.4 x 10-10)2 ) = 0.03248 x 10-17 J

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