224 Coverage after MQ - After MidQuarter Coverage (Chem...

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1 After MidQuarter Coverage (Chem 224, Summer 2011) Chap. 13, NMR Spectroscopy In class coverage was more extensive and in greater depth than the corresponding portions of the text, pp. 418-429 + lower portion p. 431 [13.7 – 13.14] // Skip interlude on MRI. Suggested problems 13.15c,g,h,i, 16, 17, 18, 22, 24, 25d, 26b, 51, 52, 53a,b (include expected values here forward), 56, 61, 63, 64, 66, 68-73, 74a. Key concepts – nuclear spins, chemical shifts (the , ppm, scale and why it is used), uniqueness of nuclear sites (carbon counting in 13 C-NMR, number of signals in 1 H-NMR), multiplicity due to nuclear spin- spin coupling (the J-value), H counting by integral, nearly unique values for alkenes, alkynes terminal H, aldehydes, carboxylic acids and aromatics. With the same hybridization, 1 H chemical shift reflects locl electron density: protons on more positive C’s are downfield (have larger values). Stuff just in lecture
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This note was uploaded on 01/19/2012 for the course CHEM 224B taught by Professor Andersen during the Summer '11 term at University of Washington.

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