Chemistry Question

PRINT NAME: Exam 2 Chem 230 Practice exam Dr. Bebbington 1) Indicate with arrows the location of each chirality/stereogenic center in the following structures. (10 points): 2) Assign the absolute stereochemistry (R or S) to the chirality centers in the following molecules (28 points): 3) Use the templates below to draw the two chair conformations of molecule A (9 points): 4) i) Draw the meso stereoisomer of 3,4-dimethylhexane (5 points): ii) Draw a chiral stereoisomer of 1,2-dimethylcyclopentane (5 points): 5) i) Draw a Newman projection of the molecule below, looking along the central C-C bond from the position indicated by the eye. A template to assist you is shown at right: (5 points) ii) Indicate the two most significant gauche interactions on your projection (2 points) iii) Draw a Newman projection of this molecule in an eclipsed conformation: (3 points) 6) i) Draw a Bond-Line representation of the molecule represented by the Newman projection below: (5 points) ii) Draw a Newman projection of a diastereomer of this molecule (3 points): 7) Look at the molecule below: i) Draw its enantiomer (4 points): ii) Draw one of its chiral diastereomers (4 points): iii) Draw one of its achiral diastereomers (4 points): 8) Name the following molecules according the IUPAC system (8 points): 9) Assign the alkene stereochemistry as E or Z in the following example (5 points):

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