13 Course Review 2011 SPRING - Final Lab Section/Room...

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Unformatted text preview: 4/27/11 Final Lab Section/Room Assignments for Exam 2 Wednesday, April 27, 7-9 pm [approx # students] [54] [51] [50] [50] [49] [47] [48] [46] [47] [43] [38] Room Capacity TA 150 Animal Sciences Lab 269 Everett E & C Eng Lab 1310 Digital Comp Lab 103 Transportation Bldg 160 English Building 119 Material Sci Eng Bldg 223 Gregory Hall 112 Transportation Bldg 114 Transportation Bldg 319 Gregory Hall 317 Gregory Hall 219 111 100 106 101 99 93 90 90 90 46 Jessica Banks Ben Brandsen* Junqi Li Norio Yasui Matt Endo Erin Davis Howard Roth Hyungmin Chi Joe Macor Corbin Brangham Jagdeesh Chandrasekar* Announcements – SecondExam   The first exam will be on April 27th at 7 ­89pm.   Will cover full course (cumula=ve), with an emphasis on material since the first exam   Check for study guide – See Compass; rest of this lecture   TA ­led review session scheduled – Check Compass   Look on Compass for classroom loca=ons for your sec=on   Conflict exams (only a few) –   ShiLed hours – 461 Roger Adams Lab   Thursday morning – 461 Roger Adams Lab   To arrange to take the conflict exam:   email me [if you have not already done so] with the subject “Take Conflict Exam”   briefly state reason for the conflict in the body of the message 1 4/27/11 Exam notes   Determine your tes=ng loca=on, posted on Compass   Arrive 10 minutes early to get checked ­in and situated   Bring your U of I Student ID   You may use a calculator but NOT a programmable calculator   Bring a #2 pencil to fill in scantron forms   You will NOT need molecular models for this exam   A review session may be scheduled CHEM 233 Spring 2011 Second Exam — Study Guide Basic lab safety MelOng points RecrystallizaOon •  Know the correlaOon between melOng point and purity •  Know the origin of melOng point depression •  Know the applicaOons of melOng points •  Be able to interpret and evaluate binary eutecOc phase diagrams and how these relate to melOng points and melOng point ranges •  Know the characterisOcs of a good recrystallizaOon solvent for a given compound •  Be able to interpret and evaluate temperature/solubility diagrams or tables •  Know the difference between soluble and insoluble impuriOes and strategies for their removal •  Perform percent recovery calculaOons •  Perform calculaOons of opOmum volume of solvent for a recrystallizaOon given solubility data for a set of compounds 2 4/27/11 Thin Layer Chromatography (TLC) •  Know the general principles of chromatography: • ParOOoning • StaOonary, mobile phases • FuncOonal group polarity • Analyte/adsorbent interacOons • How to run a TLC •  Be able to rank relaOve Rf values for a series of compounds •  Be able to rank relaOve eluOng power of solvents •  Calculate Rf values from TLC plates Acid/base extracOon •  Understand parOOon coefficients •  Be able to interpret or plan an effecOve extracOon flowchart •  Be able to determine layers in a separatory funnel based on density •  Be able to track the progress of a compound during extracOon •  Use the given equaOons effecOvely to determine: •  Amount of compound extracted in single and mulOple extracOons •  Volume of solvent or number of extracOons needed to remove a given amount of compound Proton NMR •  •  •  •  •  What is the physical basis of NMR What does the RF pulse do? What is chemical shic and why is it measured in ppm? What is meant by shielding and deshielding? Determine how many equivalent hydrogens there are in a molecule •  What is coupling and why is J measured in Hz? •  Determine the mulOplet for a parOcular hydrogen •  What is Pascal’s triangle and how is it used in NMR? •  What is an integral and what is it used for in NMR? •  What is a degree of unsaturaOon and how do you determine it? •  Chemical shic and structure correlaOons – charts will be provided ==========End of Review Material for Exam 1========== 3 4/27/11 C ­13 NMR •  SensiOvity vs proton NMR •  OperaOon frequency of C ­13 vs. H ­1 NMR •  Reason for lack of coupling between C ­13 nuclei •  Reason for lack of observed coupling between C ­13 and H ­1 nuclei •  CounOng carbons in the molecule •  Lack of accurate integraOons •  Chemical shic and structure correlaOons – charts will be provided Infrared Spectroscopy •  Physical basis for the technique: the oscillator model •  Different oscillator types and dependence of frequency on mass and bond strength/bond order •  Stretching vs bending modes; direcOon of moOon and relaOve frequencies •  CorrelaOon of IR bands and funcOonal groups – Charts will be provided DisOllaOon and FracOonal DisOllaOon •  Shapes of various liquid ­vapor phase diagrams •  Raoult’s law and behavior of ideal liquid mixtures •  Simple disOllaOon vs fracOonal disOllaOon; types of columns •  TheoreOcal plates and HETP; condiOons for an effecOve fracOonal disOllaOon •  Non ­ideal behavior: minimum boiling and maximum boiling azeotropes. Vapor phase diagrams and interpretaOon of the limits of fracOonal disOllaOon to isolate pure components Nucleophilic SubsOtuOon ReacOons •  SN1 vs SN2 mechanisms and reacOon details •  How reactant and reagent structure affects subsOtuOon vs. eliminaOon, and unimolecular vs. bimolecular reacOons •  ReacOon coordinate diagrams 4 4/27/11 EliminaOon ReacOons •  E1 vs E2 mechanisms and reacOon details •  How reactant and reagent structure affects subsOtuOon vs. eliminaOon, and unimolecular vs. bimolecular reacOons •  ReacOon coordinate diagrams •  Zaitzev’s rule •  The Baeyer test – chemical basis and observaOon of posiOve test EsterificaOons •  Mechanism; all the steps •  Equilibrium reacOons and calculaOon of equilibrium constants •  DefiniOons for three types of yields Electrophilic AromaOc SubsOtuOons •  AromaOc stabilizaOon energy; resonance arguments for its origin •  Mechanism of electrophilic aromaOc subsOtuOon; drawing resonance structures •  GeneraOon of electrophiles •  SubsOtuent effects: acOvaOng vs. deacOvaOng groups, meta direcOng vs. ortho para direcOng groups Aldol ReacOons •  Mechanism •  Enol vs. enolate •  Tautomerism vs resonance 5 ...
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This note was uploaded on 04/27/2011 for the course CHEM 233 taught by Professor Staff during the Spring '08 term at University of Illinois, Urbana Champaign.

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