Mass Spectra Interpretation: ALDEHYDES

Mass Spectra Interpretation: ALDEHYDES

No. of Questions= 8

ELECTRON IMPACT MASS SPECTROMETRY PRODUCED THE SPECTRA BELOW. MANY PEAKS ARE LABELLED TO AID INTERPRETATION: M/Z (RELATIVE ABUNDANCE). LOOK AT THE HINTS AND FOLLOW THE WEB REFERENCE LINK FOR HELP. YOU WILL NEED A PERIODIC TABLE, A TABLE OF COMMON ISOTOPES (WHICH YOU CAN FIND IN THE WEB REFERENCE), A CALCULATOR, AND SCRATCH PAPER TO WORK THIS QUIZ.

1.	How many oxygens are in the molecular ion peak in this spectrum?
		Web Reference
		Click on image to enlarge
	a)	0
	b)	1
	c)	2
2.	For this same spectrum, choose the compound that the spectrum represents.
		Web Reference
		Click on image to enlarge
	a)	butanal
	b)	propanal
	c)	2-propenal
	d)	methoxy-ethene
	e)	ethanediol
3.	Find the alkyl ion series in the spectra below. (Check the hint!)
		Web Reference
		Click on image to enlarge
	a)	15, 29, 43
	b)	29, 43, 57
	c)	none
4.	Find the alkyl LOSS ion series in the same spectra shown below. (Check the hint!)
		Web Reference
		Click on image to enlarge
	a)	15, 29, 43
	b)	29, 43, 57
	c)	none
5.	For this same spectrum, choose the compound that the spectrum represents.
		Web Reference
		Click on image to enlarge
	a)	2-propenal
	b)	2-methyl propanal
	c)	pentanal
	d)	2-oxo-propanal
	e)	butanal
6.	Choose the compound that this spectrum represents.
		Web Reference
		Click on image to enlarge
	a)	hexanal
	b)	3-methyl butanal
	c)	pentanal
	d)	2-methyl propanal
	e)	2,2-dimethyl propanal
7.	Choose the compound that this spectrum represents.
		Web Reference
		Click on image to enlarge
	a)	2-methyl propanal
	b)	butanal
	c)	2-oxo-propanal
	d)	2-propenal
	e)	pentanal
8.	Choose the compound that this spectrum represents.
		Web Reference
		Click on image to enlarge
	a)	2,2-dimethyl propanal
	b)	hexanal
	c)	2-oxo-propanal
	d)	3-methyl-butanal
	e)	pentanal