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Final - Fall 200607 - 15 16 Consider a 6-carbon system...

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7 15 - 16. Consider a 6-carbon π system built of an allyl anion and an allyl cation by connecting their central carbons. The π -type MOs of that system are shown below in a random order. Note that some orbitals may be degenerate. A B C D E F 15. (2 pts) Which of the following transitions will have the largest λ max ? a) A ± F b) D ± B c) C ± B d) D ± F e) E ± B 16 . (2 pts) How many unpaired electrons are there in the molecule according to this MO scheme? a) 0 b) 1 c) 2 d) 3 e) 4 Comments: This question is about understanding MO’s and UV/visible spectroscopy. The first step is
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