ACS Organic Chemistry 2 Final Exam Actual
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Questions with correct Answers. __., __., __., __.,
What are examples of oxidizing agents?
__., __., Chromium (VI) reagents like__., __., __., __.,__., __., __., __., __., __.,
CrO3, K2Cr2O7, K2CrO4; and a manganese (VII) reagent (KMnO4).
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Chromium reagents = acidic conditions
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Manganese reagent = basic conditions
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What is the effect of electron-
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releasing groups attached to the carbonyl group?
__., __., __., __., __., __., __.,__., __., a diminished
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positive charge on the carbon atom.
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What is the effect of electron-
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withdrawing groups attached to a carbonyl group?
__., __., __., __., __., __., __.,__., __., an intensified
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positive charge on the carbon atom.
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Which anhydrous chromium (VI) reagents can stop oxidation of primary
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alcohols at the aldehyde stage?
__., __.,CrO3--2 pyridine (chromium trioxide-
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pyridine complex), PCC (pyridinium chlorochromate) and PDC (pyridinium
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dichromate)
How can an aldehyde be protected?
__., __., __., __., __., __.,__., __., Using a diol and H+
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What does permanganate do? (KMnO4, NaOH)
__., __., __., __., __., __.,__., Oxidizes aldehydes
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and primary alcohols to carboxylic acids
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, How can an acetal (being used as a protecting group) be hydrolyzed back
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to it's original form?
_., __., H2O and H+ and heat
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At what frequency is an OH or NH bond in IR spec?
__., __., __., __., __., __., __., __., __., __., __., __.,__., 3400
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At what frequency is a CH (sp3) bond in IR spec?
__., __., __., __., __., __., __., __., __., __., __.,__., 3000-2850
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At what frequency is a CH (sp2) bond in IR spec?
__., __., __., __., __., __., __., __., __., __., __.,__., 3100-3000
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At what frequency is a CH (sp) bond in IR spec?
__., __., __., __., __., __., __., __., __., __., __.,__., __.,3300
At what frequency is a C-C triple bond or C-
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N triple bond in IR spec?
__., 2100
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At what frequency is C=O bond in IR spec?
__., __., __., __., __., __., __., __., __.,__., 1700
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At what frequency is a C=C bond or aromatic C-
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C bond in IR spec?
__., 1600
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At what frequency is an aromatic C-C bond in IR spec?
__., __., __., __., __., __., __., __., __., __., __.,__., 1500
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At what frequency is carboxylic acid in IR spec?
__., __., __., __., __., __., __., __., __.,__., __.,1720 + a strong __., __., __., __.,
and broad band at 2500-3300
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