Where Is the Carbonyl Absorption Found in the IR Spectrum

question 32

Multiple Choice

Where is the carbonyl absorption found in the IR spectrum of a simple ester?

• A)2)5 ppm
• B)2250 cm^-1
• C)3800 cm^-1
• D)1740 cm^-1

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Definitions:

Sodium Cyclopentadienide

An organosodium compound derived from cyclopentadiene, acting as a strong base and nucleophile in organic synthesis.

Relative Acidities

A comparison of the acid strengths of different substances.

pKa

A quantitative measure of the strength of an acid in solution, being the negative log of the acid dissociation constant (Ka).

Tropylium Ion

A positively charged ion (cyclic cation) with the formula C7H7+, known for its aromatic stability.