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Unformatted text preview: Chem 14C Summer 2007 1 Chem 14C Last Name: First Name: Summer 2007 Section: Answer all Questions. A copy of the periodic table is attached Question 1 ( 20 points) Aspartame (ASP) is a sweetener is marketed under number of trade names is an ingredient of many consumer foods and beverages sold worldwide. It is commonly used in diet soft drinks, and is often breaks down when when heated and loses much of its sweetness. Aspartame is also one of the sugar used by diabetics. Answer the following questions ASP a. Write a molecular formula for aspartame (ASP). ______________________________ b. How many lone pairs in this molecule. _________________________________ c. How many sp 3 hybridized carbons in ASP molecule? Give a number __________ d. How many sp 2 hybridized carbons in ASP molecule? _______________________ e. What is the degree of unsaturation in ASP? Give a number ______________ f. Place an asterisk on the chiral carbon(s). g. Write numbers in the blank. ASP has ________ stereocenter(s) and therefore _____ possible stereoisomers. h. What is the most electronegative element in ASP? C H O N F i. Circle at least one conjugate pi system in ASP. Be careful to include the four atoms in the circle. j. The enantiomer of ASP rotates the plane of plane-polarized light in the opposite direction as ASP. True or false ___________ 2. [ 20 points] Explain the following; a. Which structure is more stable? Circle one CH 3 CH=CH-CH=CH-CH...
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- Spring '08
- Periodic Table