Quiz 2 Key - 2002

Quiz 2 Key - 2002 - Chemistry 439 Quiz II Name This quiz...

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Chemistry 439 Quiz II April 27, 2004 Name______________________ This quiz consists of 50 points. 1. Consider the following pulses sequence: Magnetization is left on the z-axis during τ m . (3 pts) What is the name of this experiment? NOESY (3 pts) What happens during τ m ? NOE BUILDUP (MIXING) (3 pts) What happens during t 1 ? FREQUENCY LABELING 2. Consider the pulse sequence below: Magnetization is NOT left on the z-axis during the DIPSI-2 isotropic mixing period. (3 pts) What is evolving during the DIPSI-2 isotropic mixing period? COUPLING (NOT CHEMICAL SHIFT) (3 pts) What is the name of this pulse sequence? TOCSY (3 pts) How would the 2D map using this experiment differ from the 2D-COSY for the molecule 5.1 (the COSY is shown below with the structure)? [you may draw on this map if you want] IT WOULD SHOW CORRELATION BETWEEN SPINS THAT ARE NOT DIRECTLY COUPLED BUT SHARE A COMMON COUPLING PARTNER (ALL CROSS PEAKS POSSIBLE BELOW).
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3. (32 pts) You are to make all 1 H and 13 C assignments for the molecule XXX shown
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Quiz 2 Key - 2002 - Chemistry 439 Quiz II Name This quiz...

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