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Chemistry 26200; Organic Laboratory, Section 5AD (0453)
SPRING 2012Instructor: Prof. George John
E-mail: john@sci.ccny.cuny.edu
Room: Marshak 1237, Tel (212) 650-8353
Office hours in MR 1237 on MON: 11-12 pm, FRI: 11-12 pm, or by appointment.
Teaching Assistant (TA): Xiaohua Liu, E-mail:xliu3@gc.cuny.edu, MR-1326
Catalog Description: Exercises involving the preparation and purification of carbon compounds (for non-Chemistry majors).
Course Objectives: This course is stressing the techniques involved in the preparation, isolation, purification and analysis of carbon compounds (for non-Chemistry majors). The pre-requisites for this course are Chem. 10401 and Chem. 26100. Co-requisite: Chem. 26300. A grade of C or higher is required in the prerequisite course.
Laboratory Manual: Chemical Education Resources: Organic Chemistry Laboratory-CHEM 26200 Experiments (ISBN: 978-0-495-30987-1, available from the Bookstore)
Hours/Credits: 4 hours per week, 2 cr.
Lecture: Friday (5AD): 9:00-9:50 AM, Room - MR 1109 (John)
Laboratory: Friday (5AD): 10:00-12:50 PM, Room - MR 1109
Lecture: Attempts have been made to provide good relevant learning experiences in an organic chemical laboratory. Theoretical material relevant to the experiments will be discussed in the lecture and this can supplement information pertaining to the experiment itself. The lecture will endeavor to explain techniques, relevance and applications of these, reactions, mechanisms and other information related to the experiments at hand. Each experiment in the lab manual explains background information pertinent to that experiment. In a few cases the information pertaining to the experiment will be provided in the lecture and/or laboratory since the lab manual does not contain this. Students are strongly encouraged to study this information prior to the lectures.
Schedule: The attached schedule shows the experiments that will be performed and dates for the exams. There will be unannounced quizzes on material already covered.
Grading: There are a total of 13 experiments, some relate to techniques, some to reactions and mechanisms, and some are aimed at synthesis of compounds. Of the 13 experiments the best 12 will be used in computing the final grade.
Laboratory reports for each experiment must be handed in no later than one week after completion of that experiment.
There will be one mid-term exam (worth 75 points) and one final (worth 100 points).
There will be 6 unannounced quizzes (each worth 10 points). These will be administered at the beginning of a lecture. Of these, the best 5 quiz grades will be used for calculation of the final grade.
Student performance will be evaluated by the TA and is worth a total of 25 points. A summary of the points assigned to each portion of the course is shown below. Note that the exams and quizzes constitute ~40% of the grade while the laboratory activities constitute ~60%.
Experiments 13 in all, best 12/13 x 25 points each = 300 points
Quizzes 6 in all, best 5/6 x 10 points each = 50 points
Mid-term exam, 75 points = 75 points
Final exam (comprehensive), 100 points = 100 points
TA evaluation, 25 points = 25 points
TOTAL POINTS FOR THE COURSE = 550 points (100%)
There are no makeup labs and no makeup exams or quizzes. Absence without a strong, verifiable, documented reason will result in zero points for the material missed. Lab reports not submitted in a timely manner will also result in zero points for that exercise.
Safety issues: You must wear lab goggles at all times in the lab. Do not wear shorts or short skirts without a lab coat. This is for your safety! Similarly, open shoes and slippers should not be worn. You are strongly encouraged wear latex gloves in the lab. YOUR workplace should be CLEAN always!
Breakage: Students must be aware of the fact that they will be charged for the replacement cost of any equipment that they break during the lab course. Some of the glassware is especially expensive and so you are urged to work carefully at all times.
If you have questions, comments or suggestions please contact you teaching assistant or the instructor.
Laboratory Reports:
All your lab work should be recorded in a lab notebook and not on scraps of paper. Data recorded in the notebook must be properly dated, and neatly written. Based on this information, you will generate a laboratory report that will be submitted for grading. This exercise provides experience with accurate data management and report writing. A general format for the laboratory report is provided below (Total points 25).
Name, ID number and section5%Title of experiment5Aim of experiment51Reaction and Mechanism: Any equations chemical structures relevant to the experiment as well as any pertinent mechanisms. 102Physical Properties: A table listing the compounds used, their molecular weights, amounts used in grams and moles, boiling points and density (for liquids), as applicable53Hazards: determine flammability, toxicity or corrosiveness of the compounds used in this experiment.54Limiting Reagent: Based on the balanced equation in section 1, calculate the limiting reagent of the reaction 105Theoretical Yield: Calculate the theoretical yield of the experiment56Side Reactions: Try to postulate possible side reactions that might lower the yield of the reaction57Separation Scheme: The separation scheme is a flow chart that illustrates how the compound is isolated/separated form the reaction mixtures once the reaction is done.108Procedure and Observations: Describe exactly how you performed the experiment and exactly what observations were made (e.g., color change, if any spillage occurred etc.). The observations have to be very specific. Draw a separation scheme or a flowchart. Always write this part in the third person and in past tense. 159Results: This part should include identification of the limiting reagent and calculation of the theoretical yield of the product. Actual yield of the product, physical properties of the compounds such as color or nature of product (e.g., colorless needles of compound X were obtained). Melting or boiling points. 1010Conclusions: Did you achieve what had to be achieved? Did you have any problems? Other scientific comments on the experiments, such as suggestions if you feel you could do something differently to improve the outcome of the experiment.10
Information about Reagents and Chemicals
To complete items 5 and 6 of the pre-lab report you will need information on reagents listed in the lab procedure. Information for these chemicals can be obtained from a number of sources. The most common resource for this information is the CRC Handbook of Chemistry and Physics, the Material Safety Data Sheets or the Aldrich catalog. Several sources can be found in the library. There are also a number of sources for this information online. A page listing these sources has been assembled by the campus science librarian at the url;
HYPERLINK http://www.ccny.cuny.edu/library/divisions/science/chems.htm http://www.ccny.cuny.edu/library/divisions/science/chems.htm; or, HYPERLINK http://physchem.ox.ac.uk:80/MSDS/ http://physchem.ox.ac.uk:80/MSDS/
Statement on Academic Integrity:
The CCNY policy on academic integrity will be followed in this course. The document can be found through the CCNY website by clicking on Current Students ! A c a d e m i c S e r v i c e s ! P o l i c y o n A c a d e m i c I n t e g r i t y ( C U N Y p o l i c y o n a c a d e m i c i n t e g r i t y : w w w 1 . c c n y . c u n y . e d u / f a c u l t y s t a f f / p r o v o s t / u p l o a d / a c a d e m i c i n t e g r i t y . p d f - 2 0 0 7 - 0 1 - 1 9 ) . A l l s t u d e n t s m u s t r e a d t h e d e t a i l s r e g a r d i n g p l a g i a r i s m a n d c h e a t i n g i n o r d e r t o b e f a m iliar with the rules of the college. Cases where academic integrity is compromised will be prosecuted according to these rules. In addition, the Policy of Academic Integrity can be found in the Undergraduate Bulletin 2007-2009 in Appendix B.3 on page 312.
The conversion from points to letter grades is done as follows:
97-100: A+ 77-79: C+
93-96: A 73-76: C
90-92: A- 70-72: C-
87-89: B+ 60-69: D
83-86: B 0-59: F
80-82: B-
Course Learning Outcomes for Chem 26200:
To understand the physical principles underlying the techniques used for purification of compounds, separation of reaction mixtures, monitoring reactions and analyzing reaction products in organic chemistry lab.
Understand the mechanistic basis of synthetic experiments.
To learn and execute several fundamental organic laboratory techniques used.
To perform fundamental organic reactions.
To learn the safety precautions required in an organic lab.
To learn the calculations associated with synthetic organic experiments.
To learn how to make observations, collect data and write a lab report for an organic synthesis experiment.
The City College of New York- Department of Chemistry
Chemistry 26200-Organic Chemistry Laboratory-Spring 2012
Section 5AD (0453): Lecture: Room MR 1109: F-9:00-9:50 AM; Lab: Room MR 1109: F-10:00-12:50 PM
SCHEDULE OF EXPERIMENTS
Week 1 Jan 27, FRIIntroduction, Check In, Measuring Melting Points of Compounds and Mixtures (identifying an unknown compound by mixture melting point)TECH 701Week 2 Feb 03, FRIPurifying Acetanilide by RecrystallizationTECH 703Week 3 Feb 10, FRISeparating Cyclohexane and Toluene by Distillation (Macroscale fractional distillation)TECH 704Week 4 Feb 17, FRISeparating Acids and Neutral Compounds by Solvent Extraction (Macroscale extraction)TECH 705Week 5 Feb 24, FRISeparating Ferrocene and Acetylferrocene by Adsorption Column Chromatography (Use dry pack method with microscale column/stationary phase-silica gel)TECH 708Week 6 Mar 02, FRIGas Chromatography and Thin Layer ChromatographyHandoutsWeek 7 Mar 09, FRI(Group 1): Brominating Alkenes, (Group 2): Identifying an Unknown Compound by Infrared Spectroscopy TECH 719
TECH 710Week 8 Mar 16, FRI(Group 2): Brominating Alkenes; (Group 1): Identifying an Unknown Compound by Infrared Spectroscopy
MID-TERM EXAMTECH 719
TECH 710
Week 9 Mar 23, FRIQualitative Test for Alkenes and Identifying an Unknown Compound by FT-IR/ATRTECH 472Week 10 Mar 30, FRIStudying SN1 and SN2 Reactions: Nucleophilic Substitution at Saturated Carbon (Synthesizing 1-bromobutane [SN2] using macroscale techniques)REAC 714Week 11 Apr 20, FRIDehydrating Cyclohexanol (Semi-microscale)REAC 712Week 12 Apr 27, FRINitrating Methyl BenzoateREAC 716Week 13 May 04, FRIThe Aldol Condensation: Synthesis of Dibenzalacetone (Semi-microscale)SYNT 720Week 14 May 11, FRIFINAL EXAM, Equipment Check OutFINAL EXAM
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