Lab #4 part 3

Question 1

C=O

Answer 1

Strong bond

Question 2

C=-N (triple bond)

Answer 2

medium

Question 3

C=-C (triple bond)

Answer 3

weak

Question 4

The higher the percent s-character, the

Answer 4

stronger the bond and higher the wavenumber absorption

Question 5

A more polar bond will have

Answer 5

a stronger absorption than a
less polar bond.

Question 6

Two of the most common infrared band shapes are narrow and broad. Describe the way they look

Answer 6

Narrow= thin and pointed
Broad= wide and smoother

Question 7

When can IR be used

Answer 7

when comparing samples. If two pure samples display the same IR, it can be argues that they are the same compound

Question 8

IR is most useful in providing information about the presence or absence of specific

Answer 8

functional groups

Question 9

What doesn’t IR provide?

Answer 9

detailed information or proof of molecular formula or structure.

Question 10

What des IR provide?

Answer 10

fucntional groups or molecular fragments

Question 11

What does sharp band around 2200-2400 indictae

Answer 11

possible prescence of C-N or C-C

Question 12

What region is considered the fingerprint region?

Answer 12

600-1400 cm