CHEM 4812
Chapter 2 Learning Objectives

Be able to describe spectroscopy in general terms including whether it is a destructive or nondestructive method of analysis.

Be able to list and briefly describe three types of spectroscopy.

Be able to draw a representative sketch of a symmetrical stretch, an asymmetrical stretch, and a bend.

Be able to predict the number of theoretical modes for a linear and a non-linear molecule.  Be able to list three reasons some of these modes might not be observed in an IR spectrum.

Be able to list the four common parts of an FTIR instrument.

Be able to briefly describe six sampling methods (including ATR) for IR spectroscopy.

Be able to list and briefly describe 3 common IR sources.

Be able to briefly describe the DTGS IR detector.

Be able to explain what is meant by the "fingerprint region".

Be able to identify common absorbances for the groups of atoms or functional groups:

CH3
CH2
sp2C-H
sp C-H
alcohol O-H
carboxylic acid O-H
N-H
NH2
C=C
C=N
C=O (ketone, aldehyde, carboxylic acid, ester, amide)
aldehyde C-H
C=C
Aromatic rings (mono substituted, disubstituted)
C=N
C-N
C-O
amides
esters
 

Given IR data, be able to determine the functional groups and types of bonding, etc. in an unknown compound.

Be able to use IR data and mass spectrometry data to predict the structure of an unknown compound.

Be able to recognize overtones and coupling in an IR spectrum.