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Electronic Transitions

The absorption of what type of electromagnetic radiation results in electronic transitions?

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C=O Stretch

For carbonyls that are part of a conjugated π-network, the C=O stretch:

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1H NMR Spectrum

The 1H NMR spectrum of an unknown compound shows the following signals: triplet, quintet and triplet (relative integrals 1:2:3, respectively). Which compound is consistent with this data?

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Cis and Trans

Which of the following statements best describes the structural relationship between cis-1,2-dibromocyclopropane and trans-1,2-dibromocyclopropane?

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The Usual Suspects

Place the following in order of LEAST acidic to MOST acidic.

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Most Acidic Proton

Which labeled proton in the following molecule is most acidic?

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Best Leaving Group in Substitution

Which is the best leaving group in a substitution reaction of an alkyl halide from the following choices?

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Stereoisomers of Quinine

Quinine is well-known antimalarial drug from the bark of the cinchona tree. In principle, how many stereoisomers of quinine are possible?

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Diels-Alder Reaction

Which diene would be more reactive in a Diels-Alder reaction and why?

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Heating of Beta-Keto Carboxylic Acids

The addition of heat and acid to 2-oxocyclopentanecarboxylic acid produces:

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