{"id":1654,"date":"2017-10-10T16:35:35","date_gmt":"2017-10-10T16:35:35","guid":{"rendered":"https:\/\/courses.lumenlearning.com\/suny-mcc-organicchemistry\/?post_type=chapter&p=1654"},"modified":"2018-10-05T19:19:57","modified_gmt":"2018-10-05T19:19:57","slug":"infrared-spectra-of-some-common-functional-groups","status":"publish","type":"chapter","link":"https:\/\/courses.lumenlearning.com\/suny-mcc-organicchemistry\/chapter\/infrared-spectra-of-some-common-functional-groups\/","title":{"raw":"Infrared Spectra of Some Common Functional Groups","rendered":"Infrared Spectra of Some Common Functional Groups"},"content":{"raw":"
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Objectives<\/h3>\r\n
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\r\n\r\nAfter completing this section, you should be able to use an infrared spectrum to determine the presence of functional groups, such as alcohols, amines and carbonyl groups, in an unknown compound, given a list of infrared absorption frequencies.\r\n\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n
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Study Notes<\/h3>\r\nIn Chapter 12.7<\/a>, you should have learned, in broad terms, where a few key absorptions occur. Otherwise, to find the characteristic infrared absorptions of the various functional groups, refer to this IR table<\/a>.\r\n\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n
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Spectral Interpretation by Application of Group Frequencies<\/h2>\r\nOne of the most common application of infrared spectroscopy is to the identification of organic compounds. The major classes of organic molecules are shown\u00a0in this category\u00a0and\u00a0also linked on the bottom page for the\u00a0number of collections of spectral information regarding organic molecules.\r\n

Hydrocarbons<\/h3>\r\n
\r\n\r\nHydrocarbons compounds contain only C-H and C-C bonds, but there is plenty of information to be obtained from the infrared spectra arising from C-H stretching and C-H bending.\r\n\r\nIn alkanes, which have very few bands, each band in the spectrum can be assigned:\r\n