Exam 5: Stereochemistry at Tetrahedral Centers

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Instructions: In the molecules below,assign R,S configurations to the chirality center indicated with an arrow. Instructions: In the molecules below,assign R,S configurations to the chirality center indicated with an arrow.    -Refer to instructions.The configuration of this carbon atom is _____. -Refer to instructions.The configuration of this carbon atom is _____.

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How many stereoisomers of 3-chloro-2-methylbutane exist? How many stereoisomers of 3-chloro-2-methylbutane exist?

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The numbers on the carbon center of the following molecule represent atomic numbers. The numbers on the carbon center of the following molecule represent atomic numbers.   The molecule is in The molecule is in

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Which of the following is the definition of a meso compound?

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Which of the following compounds is (are)achiral? Which of the following compounds is (are)achiral?

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Instructions: Identify the indicated hydrogens in the following molecules as pro-R or pro-S. Identify: Instructions: Identify the indicated hydrogens in the following molecules as pro-R or pro-S. Identify:

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Instructions: Place asterisks at all the chirality centers in each molecule below. Place asterisks: Instructions: Place asterisks at all the chirality centers in each molecule below. Place asterisks:

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Which of the following has a plane of symmetry?

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How many stereoisomers of 2,3-dimethylbutane exist? How many stereoisomers of 2,3-dimethylbutane exist?

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Which of the following have the S configuration? Which of the following have the S configuration?

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Which of the following have the R configuration? Which of the following have the R configuration?

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Instructions: Consider the structure of streptimidone below to answer the following question(s). Instructions: Consider the structure of streptimidone below to answer the following question(s).    -Refer to instructions.Does streptimidone have a meso stereoisomer? Explain. -Refer to instructions.Does streptimidone have a meso stereoisomer? Explain.

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Rank the following substituent groups from highest to lowest priority according to the sequencing rules. CO2CH3 CO2H OH Cl

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