Organic Chemistry 2 ACS Final Exam (2026/2027) | Recent Questions | 100% Accurate Answers | A+ Verified

Organic Chemistry 2 ACS Final Exam
(2026/2027) | Recent Questions | 100%
Accurate Answers | A+ Verified
• How can an acetal (being used as a protecting group) be hydrolyzed back to it's
original form? -✓✓H2O and H+ and heat


• At what frequency is an OH or NH bond in IR spec? -✓✓3400


• At what frequency is a CH (sp3) bond in IR spec? -✓✓3000-2850


• At what frequency is a CH (sp2) bond in IR spec? -✓✓3100-3000


• At what frequency is a CH (sp) bond in IR spec? -✓✓3300


• At what frequency is a C-C triple bond or C-N triple bond in IR spec? -✓✓2100


• At what frequency is C=O bond in IR spec? -✓✓1700


• At what frequency is a C=C bond or aromatic C-C bond in IR spec? -✓✓1600


• At what frequency is an aromatic C-C bond in IR spec? -✓✓1500


• At what frequency is carboxylic acid in IR spec? -✓✓1720 + a strong and broad
band at 2500-3300

,• At what frequency is an amide bond in IR spec? -✓✓two medium strength bands
around 3400 + the carbonyl band below 1700


• At what frequency is an sp3 C atom in a proton NMR spec? -✓✓1


• At what frequency is a C atom attached to a pi system in a proton NMR? -✓✓2


• At what frequency is a C atom attached to an O atom in a proton NMR? -✓✓3-4


• At what frequency is an sp2 C atom in a proton NMR? -✓✓5-6


• At what frequency is an aromatic C atom in a proton NMR? -✓✓7-8


• At what frequency is an aldehyde C atom in a proton NMR? -✓✓10


• At what frequency is a carboxylic O atom in a proton NMR? -✓✓11-12


• At what ppm is an sp3 alkyl C atom in carbon NMR? -✓✓10-30


• At what ppm is an sp3 C atom attached to O, N, or X in carbon NMR? -✓✓50-
70


• At what ppm is an sp C atom in carbon NMR? -✓✓75-90

, • At what ppm is an sp2 C atom in carbon NMR? -✓✓100-150


• At what ppm is an ester, amide, or carboxyl C=O in a carbon NMR? -✓✓160-
180


• AT what ppm is an aldehyde or ketone C=O in a carbon NMR? -✓✓190-200


• What are examples of oxidizing agents? -✓✓Chromium (VI) reagents like CrO3,
K2Cr2O7, K2CrO4; and a manganese (VII) reagent (KMnO4).
Chromium reagents = acidic conditions
Manganese reagent = basic conditions


• Which anhydrous chromium (VI) reagents can stop oxidation of primary alcohols
at the aldehyde stage? -✓✓CrO3--2 pyridine (chromium trioxide-pyridine
complex), PCC (pyridinium chlorochromate) and PDC (pyridinium dichromate)


• In oxidative cleavage reactions, what reagents will cleave vicinal diols, alkenes,
and methyl ketones? -✓✓Vicinal diols = HIO4 (periodic acid)
Alkenes = ozone
Methyl ketones = alkaline solutions of the halogens (haloform reaction)


• In oxidative addition products of alkenes and alkynes, which reagents can be
used? -✓✓Cold, alkaline permanganate, osmium tetroxide and proxy acids.


• Chromic acid is an oxidizing reagent that -✓✓does not oxidize ketones; but it
can oxidize C-C double bonds.