lect34-apr26

lect34-apr26 - Chemistry 101-501 Spring 2010 Instructor:...

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8/11/10 11 Instructor: Dr. David P. Barondeau Office: Interdisciplinary Life Science Building Room 1196A Phone: 458-0735 E-mail: barondeau@tamu.edu ( please put CHEM 101 in subject line) Lecture: MWF 9:10-10:00 Room 100 Heldenfels Office Hours: M 10:15 - 11:30 (Room 104A Heldenfels) W 10:15 - 11:30 (Room 104A Heldenfels) or by appointment Course Website: Blackboard Vista ( http://elearning.tamu.edu/) Instructor Assistant: Jessica Garber jgarber@mail.chem.tamu.edu (Tues 7-9 Held 100) Supplemental Instructional Leader: Kathy Webb kmwebb2010@neo.tamu.edu (Sun 9-10; Wed 7-8; Thurs 6-7 all in HRBB 15) Chemistry 101-501 Spring 2010
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8/11/10 22 Chemistry 101 Homework problem set 7 has been assigned (due April 27th) Exam 4 will be on Friday April 30th (as originally scheduled) If you are having difficulty with the homework Email: jgarber@mail.chem.tamu.edu (IA Jessica Garber) Email me at barondeau@tamu.edu My office hours M, W 10:15 to 11:00 (HELD 104A) T R 5-6:00 in ILSB room 1196A TA Help desk HELD 116 Review sessions SI Leader Kathy Webb kmwebb2010@neo.tamu.edu Sun 9-10; Wed 7-8; Thurs 6-7 all in HRBB 15 Instructional Assistant Jessica Garber jgarber@mail.chem.tamu.edu Tues 7-9 HELD 100
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8/11/10 33
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8/11/10 44 For each of the following functional classes of molecules, provide an example that has THREE (and only three) carbon atoms (plus the appropriate number of hydrogens, nitrogens, and oxygens for its functional class) and then NAME your example. a. Alkane b. Alkene c. Alkyne d. Cycloalkane e. Alcohol f. Ether g. Amine
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8/11/10 55 Amides: nitrogen geometry Carbon atom of amide linkage expected to be sp2 hybridized with bond angles of 120 degrees Exactly what is observed in structure Nitrogen atom is surrounded by four pairs of electrons Predict N atom to have sp3 hybridization and bond angles of 109 degrees Not what we observe Nitrogen atom also has trigonal planar geometry with three bonds at 120 degrees Second resonance form of amide
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8/11/10 66 Alpha-Amino Acids H C H 3 C CO 2 NH 3 Chiral α -carbon Alanine C H H 2 N C O OH R Acid Amine
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8/11/10 77 Peptides and Proteins H 3 N O Ğ O H HOCH 2 H 3 N O Ğ O CH 3 H N O Ğ O CH 3 H H H 3 N O H HOCH 2 peptide bond Serine Alanine + Adding more peptide links ---> PROTEIN H2O
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8/11/10 88 Polymers Giant molecules made by joining many small molecules called monomers Average production is 150 kg per person annually in the U.S.
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lect34-apr26 - Chemistry 101-501 Spring 2010 Instructor:...

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