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HW #2-Chem 255

HW #2-Chem 255 - Homework#2 Chemistry 25500 — Fall 2009...

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Unformatted text preview: Homework #2 Chemistry 25500 — Fall 2009 Name: 1&2th I it’d Bari": Grade: [25 Please return before class on Wednesday, Oct. 21 using this page: use blue or black ink only! 1. Draw all possible stereoisomers of the amino acid threonine (natural & unnatural forms) using the template shown on the right! Assign the R and S configuration to each —— (3 -— stereocenter of each stereoisomer. 16 pts ‘ I I .- C " Stereoisomers: . H 71} l g E H , ’2: i as i: ‘- ' CH. l a: 1 H HWC‘OH ‘ ”07¢ bebca‘m’li H0 ‘ \ l l 7 Mia ’94 3"" 637 l l E H I (miss) (ZS; 35) cm: CiHZN CVC‘W Hi Him 31H” (25,5 £7 2. Provide a mechanism that accounts for the formation of the reaction products below (use arrows and structures only to explain)! 9 pts H CH2 H C H3 H CH3 HLH+>=< HZC H H20 Cl H2C H ...
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