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318-3 - CH 318 N LECTURE 3 Textbook Assignment Chapter 13...

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1 CH 318 N LECTURE 3 Textbook Assignment: Chapter 13 begin NMR Homework (for credit): POW 2 posted Material from Last Lecture: IR spectroscopy Today’s Topics: IR: interpretation -finish Notice & Announcements: No Class on Thursday 1/29 Podcast will be posted to WEB Organic Lecture Series 2 IR of Molecules with C=O Groups C=O C=O C-H O H RCOH O RCH O RCR' O C=O Strong 1700-1725 Stretching Carboxylic acids Aldehydes Vibration Carbonyl Group Frequency (cm -1 ) Intensity Stretching 1630-1820 Strong Stretching 2720 Weak Stretching 2500-3300 Strong (broad) Ketones Stretching 1630-1820 Strong
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