Chem 14C Midterm Exam 1 sol

Chem 14C Midterm Exam 1 sol - Chemistry 14C Fall 2006...

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Chemistry 14C Fall 2006 Midterm Exam 1 Solutions Page 1 Statistics: High score, average and low score will be posted on the course web site after exam grading is complete. The exam is ready to be picked up when these numbers are posted. A note about exam keys: The answers presented here may be significantly longer than expected from a student taking the exam. An exam key serves not only to reveal what was expected, but to instruct you as well. To see the projected course grade cutoffs, consult the grading scale on the Chem 14C course web page. 1. C N N H H C N N H H C N N H H Most significant About half of the exams contained resonance contributors with five bonds to the middle nitrogen atom (i.e., a pentavalent nitrogen). Like carbon, it is never possible for nitrogen to have ten electrons! 2. C N N H H δ + δ 3. (a) sp 2 (b) sp 4. Alkene, benzene ring, carboxylic acid and ester 5. All lie in the same plane. This geometry allows for maximum conjugation . 6.
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Chem 14C Midterm Exam 1 sol - Chemistry 14C Fall 2006...

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