Exp006-ShaziaMehmood2

[|EXP 006]

Is this NMR of the crude product consistent with the compound shown?


NMR Expected:

-For the CH3 next to the sulfur, expect a singlet because there are no other hydrogens within 3 bonds. The CH3 attached to the furan should produce a singlet at [|2-3ppm] which is confirmed in the above NMR. -In the [|2-2.5ppm] range, two triplets should be seen due to the two C-H groups attached to each of the two carbonyl carbons. The carbon is also connected to a nitrogen, which could affect the proton NMR results. In this NMR though, the peaks are shown at about 2.3ppm, where predicted. The expected range for N-CH-CO grouping is [|2-4ppm.] -The N-H bond should produce a doublet or a singlet in the [|3-4ppm] region. This depends on whether or not splitting occurs. -[|Furan] should have produced a multiplet (or two doublets) in [|5-7ppm] region. This range is shown in the reference under "AA'XX' Spin Systems." -Benzene ring should produce a multiplet or a singlet in the [|7-8ppm] range.

We learned about NMR in Chapter 13 of Orgo II.


 * Full Marks**

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