1. The letters&arrows; in the formula refer to the carbons or hydrogens for four

Question

1. The letters&arrows; in the formula refer to the carbons or hydrogens for four of the five groups in 3-methyl-2-butanone (methyl isopropyl ketone. c. (1) If the unlabeled methyl is equivalent to one of HC-C-C-CH3 the labeled groups, give the label (a thru d) for its chemically equivalent group. CH3 #1 (2) In the C-13 nmr spectrum, which carbon should have the farthest downfield signal In the C-13 nmr spectrum, which carbon should have the farthest upfield signal? In the H-1 nmr spectrum, which hydrogen should have the farthest downfield signal? d signal?_ In the H-1 nmr spectrum, which hydrogen should have the farthest upfield signal?

Explanation / Answer

1) the equivalent group is d), if the principal chain its taked with the unlabeled group, d) group would be the methyl group

2)

In the C-13 nmr spectrum, the carbon wich should have the farthest downfield signal is the d), cause has the form R-CH3

In the C-13 nmr spectrum, the carbon wich should have the farthest upfield signal is the b), because has the form R-C=O-R

In the H-1 nmr spectrum, the hydrogen wich should have the farthest downfield signal is the d)

In the H-1 nmr spectrum, the hydrogen wich should have the farthest upfield signal is the b)

c)

d)

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