CHM 258 Announcements

5/9/07

· I have organized all the notebooks and graded reports. You can pick them up in the chemistry office. When I get a chance I may post a list of grades similar to those for CHM 256. I used the cutoffs listed in the 3/29 announcement. I will be holding onto the Report 5 papers so that I can improve the procedure for the experiment. If you really need them back, I can get them to you.

5/6/07

Report 8 has been graded. The averages were 17.9 (T 9 AM), 17.8 (W 3 PM), and 18.4 (R 2:30 PM). The range of scores was 20, 20, 19.8, 19.7, 19.5, 19.5, 19.3, 19.3, 19.2, 19, 18.9, 18.7, 18.6, 18.6, 18.6, 18.5, 18.3, 18.3, 18.3, 18.2, 18.1, 18.1, 17.9, 17.8, 17.8, 17.7, 17.5, 17.5, 17.3, 17.2, 17.1, 17, 16.9, 16.2, 15.8, 15, and 11.7.
Report 9 has been graded. The averages were 33.3 (T 9 AM), 35.9 (W 3 PM), and 33.0 (R 2:30 PM). The range of scores was 40, 40, 40, 39.4, 39.4, 39.4, 39.4, 39.4, 38.8, 38.8, 38.2, 38.1, 37.6, 37.6, 36.9, 36.8, 36.4, 36.3, 35.7, 35, 34, 33.8, 33.8, 33.8, 33.2, 33.2, 33.2, 32.9, 32.9, 32.3, 30.4, 29.6, 29.4, 26.6, 25.6, 24.1, 20.2, and 13.2.
Report 6 has been graded. The averages were 17.8 (T 9 AM), 17.2 (W 3 PM), and 17.6 (R 2:30 PM). The range of scores was 19.9, 19.8, 19.7, 19.5, 19.5, 19.4, 19.3, 19.3, 19.2, 19.1, 19.1, 19, 18.7, 18.7, 18.7, 18.3, 18.3, 18.3, 18.2, 18.2, 18, 17.9, 17.7, 17.4, 16.6, 16.4, 16.3, 15.4, 15.2, 15.1, 14.2, 11.7, and 6.3.

5/5/07

Report 5 has been graded. The averages were 18.2 (T 9 AM), 18.0 (W 3 PM), and 17.9 (R 2:30 PM). The range of scores was 20, 20, 20, 20, 20, 20, 20, 20, 19.8, 19, 18.5, 18.4, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17.9, 17.6, 17.6, 17.6, 17.5, 17, 17, 16.5, 16.1, 16, 16, 15.1, and 13.2.

5/4/07

Report 4 has been graded. The averages were 17.3 (T 9 AM), 17.7 (W 3 PM), and 18.2 (R 2:30 PM). The range of scores was 20, 19.8, 19.5, 19.5, 19.5, 19.5, 19.5, 19.5, 19.5, 19.5, 19.5, 19.5, 19.4, 19.3, 19.1, 19, 19, 19, 19, 19, 18.5, 18.5, 18.5, 18, 17.8, 17.5, 16.8, 16.5, 16.5, 16.5, 15.5, 14.5, 14, 13, 12.5, 12.5, and 11.5.
Graded Reports 3C and 4 will be left outside my office as long as I am here today.

5/3/07

Report 3C has been graded. The averages were 15.2 (T 9 AM), 16 (W 3 PM), and 15.8 (R 2:30 PM). The range of scores was 19.6, 19.4, 19.2, 18.4, 17.9, 17.8, 17.5, 17.1, 17, 16.8, 16.6, 16.3, 16.2, 16, 15.9, 15.8, 15.6, 15.6, 15.6, 15.5, 15.4, 15.4, 15.2, 15.2, 15.2, , 14.6, 14.5, 14.2, 14, 13.5, 12.2, 12.1, 10.7, and 10.6.

5/2/07

Remember that you must check out in order to receive a grade other than incomplete, you must check out of your locker. Please make an appointment with me to do so. I prefer times around noon each day.
I have listed below remaining due dates and changes. The red box for reports and notebooks will be outside my office whenever I am on campus. Otherwise, it will be in the Chemistry Department office.

Notebook: May 4^th 12:00 PM (noon) Do not write compound tables for Exp. 8 and 9.
Report 9: due May 3^rd 6:00 PM
Report 8: due May 3^rd6:00 PM Unfortunately, I caused confusion about what questions to answer. I had wanted questions 1 – 9, but considering what I previously announced, you need to answer only questions 1 – 8.
Report 6: due May 3^rd 6:00 PM The GC’s will not be required. I will probably still check the samples, but only for purposes of improving the procedure. Remember that due to impurities, you should not include the NMR integration values in the journal procedure.
I will be working on the clicker points in CHM 256. After that, I will finish grading Report 3C. If you haven’t turned it in, you need to do so soon.

4/27/07

I am still working on NMR’s and GC’s. If you don’t get them today, I will bring them to the final on Monday.
Dr. Ericson wants to dispose of the Exp. 8 plates. Try to have at least one member of your group look at the plates after CHM 256 lecture.

4/24/07

As stated last week, for all sections, this will be the order of events for the last lab class,

Announcements
Evaluations
Last experiments and check out.

Check Out Procedure

a. Clean everything including hot plates and ring stands.
b. Wipe out your drawer and hood.
c. Check for any missing equipment.
d. Replace any missing equipment.
e. Pay all bills to the Bursar.
f. Line up all equipment on a bench in the order they appear in the equipment list.
g. Any instructor or Alison can check you out.
h. You are done!

In the Quiz 2, the #2 question was thrown out. The Aldol Condensation question was made extra credit. Since the Friday class had an advantage since they heard more about the reaction in CHM 256 lecture, all borderline grades at the end of the semester for the other sections will be given an extra 2 point consideration. The reasons for the changes will be explained in lab. The score was then out of 25 points but was prorated to 30 points.
Since the situation has made it difficult to get all Exp. 6 NMR’s and GC’s to everyone, the report will be due Thur. May 3 at 6:00 PM with the other reports. This data will be provided in CHM 256 lecture or can be picked up. Also, for the journal procedure in Exp. 6, do not include the integration for the NMR data. The impurities in some samples are significant which will make the data difficult to interpret.

4/19/07

We are missing 2 Teflon thermometer adaptors. They are normally mounted on the front of your hood. Please check your drawers and replace them if you have one.
For Report 8, do not do the last question.

4/18/07

Give your instructor your sample Exp. 6. They will run the GC for you.

4/17/07

The report from for Exp. 8 has been posted. It will be due Thurs. May 3 at 6:00 PM.
The notebooks will be due Fri. May 4 at 12:00 PM (noon).
For all sections, this will be the order of events for the last lab class,

Announcements
Evaluations
Last experiments and check out.

Check Out Procedure

4/12/07

Report 3B has been graded. The averages were 6.8 (T 9 AM), 8.3 (W 3 PM), and 8.1 (R 2:30 PM). The range of scores was 10, 9.3, 8.9, 8.9, 8.8, 8.8, 8.7, 8.7, 8.6, 8.6, 8.4, 8.4, 8.3, 8.3, 8.3, 8.2, 8.2, 8.2, 8, 8, 7.9, 7.9, 7.8, 7.8, 7.5, 7.4, 7.4, 7.4, 7.4, 7, 6.9, 6.7, 6.2, 5.8, 5.4, and 1.9. Some scores would have been significantly higher, but spectra and/or samples were not turned in.

4/11/07

At this point, 6 students have completed the NMR’s for their unknowns and 5 have completed the ¹H NMR for Exp. 6. Please turn in NMR samples when you can. You can actually run them in lab.

4/10/07

The replacement procedure for Exp. 5 has been posted on the procedures page. Please note the following about it.

It is a molecular modeling and computational chemistry experiment.
No outline is necessary for it.
Most of it can and should be performed outside of lab. A small portion of it must be performed on the larger computer in the P-chem lab (SB 454).
There are 2 links on the procedures page for it.

One link is the procedure.
The second link gives your name and your compound structures for the experiment.

No notebook entries will be required for it.
The report form for it has been posted. It will be due the week of April 23.

For Experiment 6, you will not obtain a polarimeter reading. When the GC is ready, you will obtain a GC of your sample.
Report Form 6 has been posted. It will be due the week of April 23.
Report Form 9 has been posted. It will be due Thurs. May 3 by 6:00 PM.
Quiz 2 will be given the week of April 16. It will cover the notes and experiments from the last quiz through today. Last year’s quiz will be posted.

4/2/07

Upon request, I can provide unknowns for Exp. 9.
The Procedure for Exp. 8 has been posted.
Please Note!!! For Experiment 8, the bulk of the experiment must be performed in 1 lab period. The pre-lab preparation by the stockroom and the instructors is very extensive, and we can’t spend the time and material preparing for it for more than one week. This means that the only time you must perform the experiment is during the week of April 16. If you can’t make it during the normal lab period, you must show up to one of the other labs during that week.
Note Sets 6, 7, and 8 have been posted. These are the last note sets for the course.

3/30/07

Report Form 4 has been posted. It will be due the week of April 9.

3/29/07

The current cutoffs for the course will be A > 86%, B > 78%, C > 58% D > 50%, F < 50%.
Remember, grades of C, D, and F occur when reports are not turned in or tuned in incomplete.

3/28/07

The 261gas method will be better for analyzing your essential oil by GC-MS on the GCQ.
The HP-INCOS is still not quite ready for use for the essential oil.
Dr. Tahmassebi will hand back Report 3B on Friday at 2:30 PM. If your report is late, it needs to get in before that date.

3/27/07

Report 3 A has been graded. The averages were 7.79 (T 9 AM), 8.18 (W 3 PM), and 8.48 (R 2:30 PM). The range of scores was 9.9, 9.6, 9.6, 9.3, 9.3, 9.2, 9.1, 9, 9, 9, 9, 8.9, 8.9, 8.9, 8.9, 8.8, 8.6, 8.6, 8.4, 8.3, 8.2, 8.1, 8.1, 7.9, 7.7, 7.7, 7.6, 7.6, 7, 6.8, 6.8, 6.7, 6.5, 6.3, 5.5, and 3.4.
Quiz 2 has been graded. The averages were 15.7(T 9 AM), 15.6 (W 3 PM), and 15.4 (R 2:30 PM). The range of scores was 20, 20, 19.5, 19.2, 18.5, 18.5, 18.5, 18.5, 18, 18, 17.5, 17.5, 17, 17, 17, 16.5, 16.5, 16, 15.9, 15.7, 15.5, 15.5, 15.5, 15, 15, 15, 15, 14, 14, 14, 13, 13, 12.7, 12.2, 9, 8, and 4.5.

3/26/07

The special instructions for Exp. 6 have been posted.
Report 3A will be returned this week. If you are late and it is turned in by 9 AM tomorrow, it will be too late.

3/22/07

Note Set 5 has been posted.

3/21/07

Experiments 5 and 7 will not be performed this semester. Please prepare for Exp. 6 for next week.
When rinsing salt plates for IR, rinse them over a beaker and not a waste bottle. Salt plates have been dropped into the waste bottle and ruined.
Note: Please cite Alex Howard when you use the phrase “If it smells like tacos, it is cumin.”

3/20/07

The report form for Exp. 3C has been posted. It will be due at the end of your lab period next week.
A link to a procedure for using the HP-INCOS GC-MS procedure has been posted. You should be able to use either GC-MS for Exp. 4.
Two in class experiments will be removed form the schedule. This is due to the loss of one week of lab and because I normally place one more experiment than may be possible in the schedule. The experiment due to weather will be replaced by a computer experiment which will be announced soon. The grading scale will be adjusted to take into account the other lost experiment. The experiments to be removed will be posted soon.

3/14/07

The notebooks for the T and W sections have been graded. I am entering grades in a different manner this semester. I will write the # of points lost for the entries provided when the notebooks are collected. At the end of the semester, I will total the points lost and then subtract that from 65 (total points possible for notebook). If you lost 2.5 points, then your notebook grade at this time is 62.5/65. Please avoid the mistakes indicated in your notebook so that you can get the maximum possible grade.
Quiz 1 will be given next week. It will cover all lab notes before spring break except the Aldol Condensation. There may be questions about cross-linked proteins and the reaction of thiols with peroxides. There will be a question about theoretical yield, % yield, and limiting reagents.
One of last year’s quizzes is provided as a link on the home page. This time there will be no glassware questions however.

3/13/07

Report 2 has been graded. The averages were 16.5 (T 9:00 AM), 17.1 (W 3:00 PM), and 17.6 (R 2:30 PM). The range of scores was 19.7, 19.2, 19, 19, 18.9, 18.9, 18.6, 18.4, 18.3, 18.2, 18.2, 18.2, 18.2, 18.1, 17.9, 17.8, 17.8, 17.5, 17.5, 17.5, 17.5, 16.8, 16.8, 16.7, 16.7, 16.6, 16.5, 16.5, 15.9, 15.9, 15.2, 15.2, 15, 14.9, 14.7, 12, and 11.3.

3/13/07

Remember that Report 3B is due this week.
Watch the announcements for details and the posting of an old quiz.
Note Set 4 has been posted.
The special instructions for Exp. 4 have been posted. Since they have been posted late, outlines will not be required this week.

2/28/07

Since there was confusion about how to do the IR for benzil, I made an addition to the Special Instructions for 3B.

2/27/07

Notes and special procedures for Exp. 4 will be posted sometime this week or next. You will be able to start it after Spring break.
Remember to include MS data in your journal format procedure. The e.g. of journal format were inadvertently left out of Report Form 3A.
Finish 3B and start 3C. Once again, it is best to start portions where there are long periods of heating first and then do compound characterization.
Do not adjust the torque wrench for the pellet presses. It is properly set.
Remember to turn in Report 3A and your notebooks this week.

2/23/07

Since some people could not get either their GC-MS or IR for Exp. 3A, the report for it can be turned in by Friday 5:30 PM next week instead of at the end of your lab period.

2/21/07

I have posted some links on the home page to free structure drawing programs found by Dr. Tahmassebi. It is my understanding that ISIS/MDL (or now just MDL) is similar to ChemDraw. Also, if you check the Cambridge Software link on Chemfinder.com, you may see that a “relatively” cheap version of ChemDraw is available for students.
Report 1 has been graded. The averages for each section were 16.7 (T 9AM), 17.1 (W 3PM), and 16.9 (R 2:30PM). The range of scores was 19, 18.7, 18.5, 18.5, 18.5, 18.4, 18.4, 18.3, 18.1, 18.1, 18, 17.9, 17.8, 17.7, 17.6, 17.4, 17.4, 17.4, 17.1, 17.1, 17.78, 16.9, 16.6, 16.5, 16.5, 16.1, 15.8, 15.8, 15.6, 15.6, 15.5, 15.5, 15.5, 15.4, 15.4, 15.3, 13.9, and 13.1.

2/20/07

Finish Benzil (Exp. 3B and start Tetraphenylcyclopentadienone 3C as soon as you can).

There are long periods of heating or waiting for crystal formation in 3B and 3C. You should characterize your products then.

Remember that Report 2 is due at the end of your lab period this week.
Remember the Report 3A is due at the end of your lab period next week.
Turn in your notebooks or a copy of your notebooks next week. If you turn in a copy, only include entries that were not checked the first time.
I have turned back all the notebooks that were given to me on time. I wrote many things in your notebook. Don’t go back and rewrite anything that was corrected. Instead, avoid that mistake for all subsequent entries. If you left a compound table blank, please fill that in however.

2/15/07

Since the Tuesday and Wednesday sections lost a day, the labs for Thursday and Friday sections will be optional. If you feel you need to catch up, you can come in at 2:30 – 5:30 today or tomorrow. Please contact the instructor for that day if you intend to come particularly if you are not from that lab section.
At the moment, the report due dates will stay the same since they were set far in advance. Most everyone should be able to turn in 2 and 3A for their original due dates.

2/5/07 > 1 PM

The report forms for Exp. 2, 3A, and 3B have been posted. They will be due the weeks of Feb. 19, Feb. 26, and March 12 respectively.

2/5/07

Start Exp. 3B this week.
Remember to turn in Report 1 and your notebooks this week.
For now, we will use the GCQ GC-MS. Instructions for use of the instrument have been posted on the Procedures page. I will show small groups of students how to use the instrument when you use it for the first time.

1/30/07

In Experiment 3, each reaction should have a separate notebook entry.

1/29/07

Note Set 3 and Special Instructions for Experiment 3B and 3C have been posted.

1/25/07

Please clean your hoods at the end of the lab period. If necessary, use acetone to clean up compounds on the bench top inside your hood.
A student from the Fri. afternoon lab would like to trade places with someone in the Wed. afternoon lab period. If anyone in the Thurs. lab would like to trade, please let Dr. Maloney know.
Please be careful in lab and try to focus on what you’re doing at a given moment. We had 4 minor accidents in lab recently that we would like to avoid. I know it can be confusing to do multiple experiments. However, I am trying to prepare you for the type of multitasking in a laboratory environment that is often required.

1/23/07

Finish Exp. 1. Continue Exp. 2. Start Exp. 3A.
Report Form 1 has been posted. It will be due at the end of your lab period in twos (week of 2/5/07).
The notebooks will be due for Dr. Maloney’s sections in two weeks (week of 2/5/07).

1/17/07

Unless it is a minor water spill, please let me know when you have a spill or accident. Sometimes I will let you clean it up. Other times, it is necessary for safety reasons that I clean it up.

1/16/07

Start Exp. 3A next week. The 1^st part involves mixing reagents together and allowing them to crystallize for a week.

1/15/07

Start Exp. 2 and continue Exp. 1.
Be sure to have your outlines for Exp. 2.

1/4/07

The syllabus has been posted.
Note Sets 1 and 2 have been posted on the Course Notes page
Procedures for Exp. 1 and 2, and special instructions for Exp. 3 have been posted on the Procedures/Changes page.
All notebooks, reports, etc. for Dr. Maloney’s sections have been placed in the Organic Prep. Room. They can be picked up at any time the room is open. If you were in Dr. Ericson’s or Dr. Tahmassebi’s sections, you will need to contact them about your scores.
For Dr. Maloney’s sections, you don’t have to buy new notebooks if there is room in your old notebooks.
Experiment 1 will be started this week. Mix the reagents, collect the precipitate by vacuum filtration, and if possible, dissolve it in the appropriate. The spectra are also provided in the link Spectra and Data on the homepage. You will not need an outline for this experiment.

Experiment 2 will be started next week. You will need an outline for it.
Your CHM 254 grades listed by your 4 digit code have been posted as a link on the CHM 254 Final Announcement link on the home page.

If you have comments or suggestions, email me at maloneyv@ipfw.edu