last updatedMonday, October 28, 2013
Problem set Meeting 11 Announcement
1. Formal Report
a. Make sure that you turn in a hardcopy of your research paper by Friday, November 1, 2013 at 4:30 pm and the electronic version to turnitin.com as well (CourseID: 6554023, Password: Chem30CL for Fall 2013 (no spaces!)). Late reports will be deducted points (10 % per day including the weekend). If you do not submit the report online by Friday, November 1, 2013 at 10 pm, you will receive a "zero" score for the paper. In addition, it will be reported to the Dean of Students for attempted cheating. Any plagiarism, partial or full resubmission of a papers or/and other forms of cheating will result in a report to the Dean of Students as well. Make sure that you cite your sources and use your own words. Here is a checklist what should be included into the report. If you have any questions, please contact your TA or instructor asap, and not an hour before the submission deadline. The final version has to be submitted in a small report cover (see here) ! Loose paper collections, large binders or folders will not be accepted!!!
2. Quiz 5
Quiz 5 will be administered on Thursday, October 31, 2013 at 12 pm. It will cover the entire lidocaine project. Let's hope that it will not be a scary one :-)
3. Lidocaine Project
a. The postlab report for the lidocaine project has to be written in the lab notebook and submitted to the teaching assistant. The due dates are November 5, 2013 or November 6, 2013 in your regular lab section. The report has to be written in the lab notebook and is worth 15 points.
b. The final product of the lidocaine project has to be turned in to the TA by Wednesday, October 30, 2013 at 5 pm for evaluation by the instructor. Late submission will not receive any credit. Make sure that you label the vial properly. This goes for the GC vial and the sample submitted to the instructor.
4. Grignard Project
a. The Grignard project will start on October 31, 2013.
b.The instructor will provide an in-lab demonstration of the Grignard setup (setup, heating, etc.) on Wednesday, October 30, 2013 at 4:00 pm in YH 6086. Attendance in this demonstration is voluntary (no credit) and is highly advisable for students that feel intimidated by the larger setup. Part of the demonstation will already discussed in lecture prior to this in-lab demo, but certain aspects like heating cannot be shown in the lecture.
5. Research project (Week 9)
a. Please look start looking for a partner for the Ferrocene project. Your partner should be in a different time slot than yourself i.e., if you are in the T/R afternoon section, you will have to find somebody in the W/F afternoon section. This way nobody has to put in additional time outside their regular schedule, which means that each group has four lab meetings to complete the project. We have to avoid as much as possible to have the entire class running around in the lab (Safety!).
...and now back to the chemistry part of this course....the homework questions due on 10/30/2013 or 1/11/2013
1. Referring to the Grignard reaction, answer the following questions. Show chemical equations when appropriate.
a. The presence of water poses a significant problem in this reaction. Provide three sources of water in the reaction.
b. How are the Mg-turnings activated in the lab (i) prior to the reaction (ii) during the reaction?
c. Why is it not advisable to add neat bromobenzene to the Mg-turnings?
c. How does the student know that the reaction initiated?
d. What is the proper rate of addition of the bromobenzene solution?
e. What is used as the electrophile in the reaction? How is it introduced to the reaction mixture?
f. After the mixture obtained in e., was allowed to warm up, chipped ice and concentrated sulfuric acid are added. Which purpose does this step serve?
g. The combined organic layers are extracted with sodium hydroxide solution.Which layer contains the product then? In which form?
h. Benzoic acid dissolves both in water and in CCl4. Explain briefly.
