IR16. Sketch an approximate IR spectrum for each of the following compounds:

 

 

 

 

 

 

 

 

 

IR17. The oop bends are sometimes useful in distinguishing substitution pattrens around a benzene ring. Using the spectra of o-, m-, and p-xylene, formulate some guidelines about what the oop bends look like when substituents are one, two or three carbons away on a benzene ring.

 

 

 

 

 

 

 

 

 

 

 

Figure IR18. IR spectrum of m-xylene.

Source: SDBSWeb : http://riodb01.ibase.aist.go.jp/sdbs/ (National Institute of Advanced Industrial Science and Technology of Japan, 14 July 2008)

 

 

 

 

 

 

 

 

 

 

Figure IR19. IR spectrum of o-xylene.

Source: SDBSWeb : http://riodb01.ibase.aist.go.jp/sdbs/ (National Institute of Advanced Industrial Science and Technology of Japan, 14 July 2008)

 

 

 

 

 

 

 

 

 

 

Figure IR20. IR spectrum of p-xylene.

Source: SDBSWeb : http://riodb01.ibase.aist.go.jp/sdbs/ (National Institute of Advanced Industrial Science and Technology of Japan, 14 July 2008)

 

IR18.  Sketch what the following IR spectra might look like:

a)  a spectrum of 2-butanone, CH3COCH2CH3, contaminated with a roughly equal amount of 2-butanol, CH3CHOHCH2CH3.

b)  a spectrum of 2-butanone, CH3COCH2CH3, dissolved in tert-butyl methyl ether, (CH3)3COCH3,  to make a 1% solution.

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Text Box: Chris Schaller Chem 235 and Chem 236 - Organic Chemistry Infrared Spectroscopy Problems IR15. a) Identify at least three important peaks/bonds in each of the following IR spectra. b) Identify the functional group present in each of these samples. See the Functional Group Section for help. c)  Draw a possible structure for each of these compounds (there may be many, many correct answers).                                                                                                               IR16. Sketch an approximate IR spectrum for each of the following compounds:                   IR17. The oop bends are sometimes useful in distinguishing substitution pattrens around a benzene ring. Using the spectra of o-, m-, and p-xylene, formulate some guidelines about what the oop bends look like when substituents are one, two or three carbons away on a benzene ring.                       Figure IR18. IR spectrum of m-xylene. Source: SDBSWeb : http://riodb01.ibase.aist.go.jp/sdbs/ (National Institute of Advanced Industrial Science and Technology of Japan, 14 July 2008)                     Figure IR19. IR spectrum of o-xylene. Source: SDBSWeb : http://riodb01.ibase.aist.go.jp/sdbs/ (National Institute of Advanced Industrial Science and Technology of Japan, 14 July 2008)                     Figure IR20. IR spectrum of p-xylene. Source: SDBSWeb : http://riodb01.ibase.aist.go.jp/sdbs/ (National Institute of Advanced Industrial Science and Technology of Japan, 14 July 2008) IR18. Sketch what the following IR spectra might look like: a) a spectrum of 2-butanone, CH3COCH2CH3, contaminated with a roughly equal amount of 2-butanol, CH3CHOHCH2CH3. b) a spectrum of 2-butanone, CH3COCH2CH3, dissolved in tert-butyl methyl ether, (CH3)3COCH3, to make a 1% solution. Back    These materials are protected by copyright 2008, Chris P. Schaller Navigation: Back to Infrared Spectroscopy Back to Structure Determination Back to Organic Chemistry Web Materials Back to Chris Schaller Back to Chemistry Back to CSB/SJU