Infrared Spectroscopy

The infrared spectrum was obtained from a compound and showed absorptions at 2100 cm^-1,
1700 cm^-1, and 1200 cm^-1.  Identify the compound.

• CH₃COOCH₃
• C₆H₅COOH
• CH₂=CHCH₂OH
• CH≡CCH₂CO₂CH₃

Tags

NGSS.HS-PS4-4

A molecule absorbs IR at a wavenumber of 1720 cm^-1.  Which functional group could account for this absorption.
I. aldehydes
II. esters
III. ethers

• I only
• I and II 
• I, II and III 
• none of the above

Tags

NGSS.HS-PS4-4

Stronger bonds absorb  IR at 

• higher wave numbers
• lower wave numbers
• in the finger print region
• 600cm^-1

Tags

NGSS.HS-PS4-4

NGSS.HS-PS1-4

A molecule has a broadband at 3200cm^-1 and sharp band at 1711cm^-1. the molecule is most likely an

• amide
• ester
• alkanol
• carboxylic acid

Tags

NGSS.HS-PS4-3

The infrared spectrum was obtained from a compound and showed absorptions at 2100 cm^-1, 1700 cm^-1, and 1200 cm^-1.  Identify the compound.

• CH₃COOCH₃
• C₆H₅COOH
• CH₂=CHCH₂OH
• CH≡CCH₂CO₂CH₃

The substance is most likely

• Propanone

• Propanal

Most likely

• An ester

• A hydroxy-acid

Tags

NGSS.HS-PS1-2

Most likely

• An ester

• An alcohol

Tags

NGSS.HS-PS1-1