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Unformatted text preview: = 8.46 MHz / T * 9T = 76.1 MHz The negative sign for is a convention, there is no such thing as a negative frequency 3. 2 H I = 1 m = -1, 0, 1 P z = - , 0, = 6.54 MHz / T = 6.54 MHz / T * 9T = 58.9 MHz 2. (4 pts) What is the pulse length for a 90 and 180 pulse, given the diagram? What happens if you acquire a spectrum with a single 180 pulse? a 90 pulse is 10 s a 180 pulse is 20 s if you perform a simple experiment with a single 180 pulse followed by an acquisition, you would observe no NMR spectrum. 3. (2 pts) Any pair of spectra ( 1 H, 13 C) taken from an online source were accepted. You can also find the SDBS by typing SDBS into Google and clicking on the first link....
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This note was uploaded on 08/06/2008 for the course CHEM 154A taught by Professor Han during the Winter '08 term at UCSB.
- Winter '08
- Quantum Chemistry