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A solution is prepared by dissolving 400 mg of testosterone, a male sex hormone, in 10.0 mL of ethanol and placing it in a sample tube 10.0 cm in length. The observed rotation of this sample at 258C using the D line of sodium is 14.368. Calculate the specific rotation of testosterone.
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Organic Chemistry
A solution is prepared by dissolving 400 mg of testosterone, a male sex hormone, in 10.0 mL of ethanol and placing it in a sample tube 10.0 cm in length. The observed rotation of this sample at 258C using the D line of sodium is 14.368. Calculate the specific rotation of testosterone.
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Organic Chemistry
Figure 3.9 presents a scheme for separation of the enantiomers of mandelic acid. The specific rotation of optically pure (S)-(-)-mandelic acid is -158. Suppose that instead of isolating pure (S)-(-)-mandelic acid from this scheme, the sample is a mixture of enantiomers with a specific rotation of -134. For this sample, calculate the following: (a) The enantiomeric excess of this sample of (S)-(-)-mandelic acid (b) The percentage of (S)-(-)-mandelic acid and of (R)-(+)-mandelic acid in the sample.
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Organic Chemistry
The functional group created when the -OH of a carboxyl group is replaced by an NH2 group is called an amide (Section 1.3F). Draw the structural formula of acetamide, which is derived from acetic acid, and determine whether proton transfer to the amide group from HCl occurs preferentially on the amide oxygen or the amide nitrogen.
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Organic Chemistry
Arrange the alkenes in each set in order of increasing boiling point. (a) Butane, decane, and hexane (b) 2-Methylheptane, octane, and 2,2,4-trimethylpentane
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Organic Chemistry
Here is one cis,trans isomer of 2,4-dimethylcyclohexanol. Complete the alternative chair conformations on the right.
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Organic Chemistry
Following is a chair conformation of 1,3-dimethylcyclohexane. (a) Is this a chair conformation of cis-1,3-dimethylcyclohexane or of trans-1,3-dimethylcyclohexane? (b) Draw the alternative chair conformation of this compound. Of the two chair conformations, which is more stable? (c) Draw a planar hexagon representation of the isomer shown in this example.
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Organic Chemistry
Which cycloalkane shows cistrans isomerism? For each that does, draw the cis and Trans isomers. (a) Methylcyclopentane (b) 1,1-Dimethylcyclopentane (c) 1,3-Dimethylcyclobutane
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Organic Chemistry
