U6 NMR and Spectroscopy

Which molecule will produce the following spectra with 3 different H environment?

• CH₃CH₂OH
• CH₃CH₂COOH
• CH₃CH₂CHO
• CH₃COOCH₂OH

Which molecule will produce the following spectra with 2 different H environment ?

• CH₃CH₂COCH₂CH₃
• CH₃CH₂COOCH₂CH₃
• CH₃CH₂CH₂CH₃
• CH₃CH₂CH₂CH₂CH₃

Which of the following type of electromagnetic radiation affects the bonds,vibrating ,stretching rocking...

• infrared
• ultraviolet
• microwaves
• radiowaves

NMR can only be done with 

• molecules
• ¹H and ¹³C
• any element with a odd number of protons
• any element with a odd number of nucleons

The number of peaks in ¹³C NMR  for CH₃ CH₂ CH_{3 is}

• 0
• 1
• 2
• 3

The splitting pattern for the Hydrogen on the carbon at the end in high resolution ¹H NMR  for CH₃ CH₂ CH₃  

• a sextet
• a heptet
• a triplet
• isa quartet

Splitting occurs only in 

• low resolution H NMR
• high resolution H NMR
• low resolution C NMR
• high resolution C NMR

A molecule absorbs IR at a wavenumber of 1720 cm^-1. Which functional group could account for this absorption.

I. aldehydes

II. esters

III. alcohol

• I only

• I and II

• I, II and III

• none of the above

The finger print region is 

• different for each organic compound
•  from 600 - 1400 cm^-1
• both the above

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