HW02Key - sulfate ion protonated acetaldehyde (a resonance...

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Graded Homework Problem #02 – Answer Key This problem is worth a total of 20 raw points. Each box is worth 2 points. For each atom marked with an arrow in the structures given below, indicate the formal charge . Write your answers in the boxes provided. All valence electrons are shown in each structure, so you don’t need to worry about adding lone pairs or bonds. Note that the C atom on the right side of the structure for the ethyl radical has an unpaired , lone electron! Then, use the formal charges to determine the overall charge of each molecule. Once again, write your answers in the appropriate boxes. S O O O O C O H C H H H H C O H C H H H H C C H H H H H ethyl radical (note the unpaired electron!)
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Unformatted text preview: sulfate ion protonated acetaldehyde (a resonance hybrid) overall chage = overall chage = overall chage = ( H i n t : If you have calculated the formal charges correctly, you should get the same answer using either contributing resonance structure!)-1 6 - [(2/2) + 6] +2 6 - [(8/2) + 0]-1-1-1-2 Remember, the overall charge is equal to the sum of a l l of the formal charges!!! 4 - [(6/2) + 1] 4 - [(8/2) + 0] +1 +1 +1 6 - [(6/2) + 2] 4 - [(8/2) + 0] 4 - [(6/2) + 0] 6 - [(4/2) + 4] Each H has FC = 0 1 - [(2/2) + 0] Each H has FC = 0 1 - [(2/2) + 0] Each H has FC = 0 1 - [(2/2) + 0] 4 - [(8/2) + 0] 4 - [(8/2) + 0]...
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This note was uploaded on 07/16/2008 for the course CH 310M taught by Professor Iverson during the Spring '05 term at University of Texas at Austin.

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