1) Consider the following molecule: C₅H₁₂O; MW = 88 amu

a) What major cleavage pathway(s) will operate?

Answer: a-cleavage and dehydration

b) At what places will the cleavages take place?

Answer:

c) At what m/z values do you expect to see peaks?

Answer:

There should be peaks for the following ions:

Ion	m/z
	15 (rarely seen)
	73
	45
	43
	70

1) continued: Here is the actual mass spectrum:

2) Consider the following molecule: C9H10O; MW = 134 amu

a) What major cleavage pathway(s) will operate?

Answer: a-cleavage of ketone.

b) At what sites will cleavage occur?

Answer:

2) continued

c) At what m/z values do you expect to see peaks?

Answer:

Ion	m/z
	15 (rarely seen)
	119
	43
	91

Here is the actual mass spectrum: