s20 2011 week 3 day 3-post

s20 2011 week 3 day 3-post - Spin-Spin Splitting: The...

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Unformatted text preview: Spin-Spin Splitting: The Coupling Constant Reading : Section 13.4 Chemistry S-20ab Week 3 1 ¡¢ Chemistry S-20 3 Name: 1600 _______ / 14 1200 3. You have just synthesized a new compound, and the following spectroscopic data is obtained: 800 • From the mass spectrum, you deduce that the molecular formula is C 9 H 12 O . 1800 • The proton NMR spectrum is: 1400 1000 2000 2200 3000 2600 • The infrared spectrum is: 3400 Draw your best choice for the structure of this molecule in the box below. 3800 From the infrared spectrum, what functional groups are definitely present: wavenumbers (cm –1 ): From the infrared spectrum, what functional groups are definitely absent: 5H 2H 1H 1H 3H TMS Chemistry S-20ab Week 3 1 ¡¢ both of these structures have the right connectivity -- ie. the splitting patterns will be right for both! So.... which one is it?? Use the data on the next page to Fgure it out. (Chemical shifts will save the day!!!!! Test Yourself Now! 1600 1200 You have just synthesized a new compound, and the following spectroscopic data is obtained: 800 • From the mass spectrum, you deduce that the molecular formula is C 10 H 12 O ....
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This note was uploaded on 07/28/2011 for the course CHEM S20 taught by Professor Evan during the Spring '11 term at Belhaven.

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s20 2011 week 3 day 3-post - Spin-Spin Splitting: The...

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