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CHM255 - Homework Assignment 2 Assigned Oct. 9, 2013. Due at the beginning of class on Oct. 16, 2013. Late homeworks will not be accepted. Provide...

Organic chemistry homework questions.

CHM255 – Homework Assignment 2 Assigned Oct. 9, 2013. Due at the beginning of class on Oct. 16, 2013. Late homeworks will not be accepted. Provide your answers on a separate sheet of paper. 1. Label each indicated stereocenter in the molecule below as either R or S . 2. Label each of the following compounds as either chiral or achiral. 3. Draw all possible unique stereoisomers of the structure below. Label each pair of molecules as either enantiomers or diasteromers. 4. Draw a mechanism for the reaction below using the arrow-pushing convention and including all reaction intermediates.
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5. Fill in the missing reactant or product (indicated by the boxes) with the appropriate stereochemistry . If there are multiple possible products, indicate the major product. For parts (a)–(c), label the products for each reaction as either chiral or achiral. Br OH H H H 2 O, H 2 SO 4 Br 2 ,H 2 O (a) (b) (c) 1. BH 3 2. H 2 O 2 ,NaOH (d) O H O 1. O 3 2. (CH 3 ) 2 S Br Br + HBr (e)
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Q2)
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f) Chiral
Chiral
Achiral
Achiral
Achiral
Achiral Q3) Blue color bond shows bond in upper plane and red shows bond in lower plane.

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