Tag Archives: organic chemistry

How Many Pi Bonds

Dynemicin A (pictured), a potent anti-tumor antibiotic produced by Micromonosporachernisa, is a potential lead compound in anti-cancer research. How many pi (π) bonds does Dynemicin A possess?

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The Major Product

What is the major product of the following reaction?

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What Reagent

What reagent can be used to convert 2,2-dimethylbutan-1-ol into 2,2-dimethylbutanal?

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Gestrinone

Gestrinone is a synthetic steroid hormone that is marketed as a treatment for endometriosis. What is the index of hydrogen deficiency (IHD)–or degree of unsaturation–for gestrinone?

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Reaction of Alkenes

Which one of the following reactions of alkenes does the Anti-Markovnikov’s rule apply instead of Markovnikov’s rule?

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Electronic Transitions

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

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Photo attributed to melburnian.

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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Unknown Alkene

An unknown alkene with molecular formula C7H12 undergoes the following reaction in basic KMnO4 under high heat to give one product (below). What is the identity of the alkene?

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