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308_exam_1_sp2008 - PRINT NAME 1 Consider the following...

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___________________________ PRINT NAME 308 EXAM I V1 SPRING 2008 1 1. Consider the following statements 1. The longest wavelength electronic transition in a ketone is n →π * 2. The lowest energy π →π *transition in 1,3-butadiene is at shorter wavelength than the lowest energy π →π *transition in 1,4-pentadiene. 3. The longer the conjugated system, the longer the wavelength of its lowest energy π →π *transition 4.The shortest wavelength electronic transition in an alcohol is a σ σ * A. Two are true B. Three are true C. One is true D. All are true E. None are true 2. Consider the following dienes in the Diels Alder reaction: 1. Cyclopentadiene, 2. trans,trans-2,4-hexadiene, 3. cis,trans-2.4-hexadiene. 4. cis,cis-2,4-hexadiene, 5. cis,cis-1,4-dichloro-1,3-butadiene The correct order of reactivity (most reactive first) is The correct order of reactivity (most reactive first) is
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___________________________ PRINT NAME 308 EXAM I V1 SPRING 2008 2 3. 1) 2) 3) 4) Consider the following electrocyclic reactions CH 3 CH 3 CH 3 CH 3 CH 3 CH 3 CH 3 CH 3 CH 3 CH 3 CH 3 CH 3 CH 3 CH 3 CH 3 CH 3 Which occur(s) by a conrotatory process?
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___________________________ PRINT NAME 308 EXAM I V1 SPRING 2008 3
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