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HW04Key - answer questions(g through(j(a What functional...

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Bocknack CH 310M/318M Fall 2009 Graded Homework Problem #04 – Answer Key Deadline : 3:00 p.m., Monday, 9/14/09 LATE WORK WILL NOT BE ACCEPTED OR GRADED!!! This problem is worth a total of 20 raw points. Each correct answer is worth 2 points. The molecule shown below is rifampicin, which is a bactericidal antibiotic. Rifampicin is one component of a “drug cocktail” that is frequently used in the treatment of tuberculosis. In the line–angle structure given below, no lone pairs are shown explicitly. All atoms in rifampicin have a formal charge of zero, however. Arrows marked with letters point to various parts of the structure. These letters correspond to the questions below the structure. Answer each of these questions, writing your response in the appropriate box. Note that you’ll need to look at the structure of the entire molecule to
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Unformatted text preview: answer questions (g) through (j)! (a) What functional group is this C atom (f) What hybrid orbitals overlap to form this a part of? σ bond? (b) What functional group is this N atom (g) How many of the carbon atoms within the a part of? structure of rifampicin are part of a methyl group ? (c) What functional group is this O atom (h) What is the total number of H atoms present a part of? within the structure of rifampicin? (d) What hybrid orbitals overlap to form this (i) What is the total number of π bonds present σ bond? within the structure of rifampicin? (e) What hybrid orbitals overlap to form this (j) What is the total number of lone pairs σ bond? present in this molecule? (a) O O NH O OH N N N O OH OH O O H OH O O (b) (c) (d) (e) (f) amine ester ether sp 2 –sp 2 sp 3 –sp 2 sp 3 –sp 3 10 58 12 28 Wednesday, 9/16/09...
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