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3 Pages
project 2
Course: CHEM 2320, Fall 2008School: Utah State
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Word Count: 148
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2 Project of Chem 2320 Honorary I. Explain the difference of observed chemical shifts among the aromatic protons (ortho/para vs. meta positions) for the following compounds. 1. Anisole OCH3 6.880 7.259 6.919 Anisole 2. Toluene CH3 7.061 7.138 7.042 Toluene 3. Chlorobenzene Cl 7.279 7.225 7.162 Chlorobenzene 4. Benzaldehyde CHO 7.868 7.511 7.608 Benzaldehyde 5. Nitrobenzene NO2 8.193 7.519 7.650...
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2 Project of Chem 2320 Honorary I. Explain the difference of observed chemical shifts among the aromatic protons (ortho/para vs. meta positions) for the following compounds. 1. Anisole
OCH3
6.880 7.259 6.919 Anisole
2. Toluene
CH3
7.061 7.138 7.042 Toluene
3. Chlorobenzene
Cl
7.279 7.225 7.162 Chlorobenzene
4. Benzaldehyde
CHO
7.868 7.511 7.608 Benzaldehyde
5. Nitrobenzene
NO2
8.193 7.519 7.650 Nitrobenzene
II. Based on the effects of substituents (CH3O-, CH3-, Cl-, formyl, and O2N-) on the chemical shifts as compared to that of benzene, provide an explanation for the relative of reactivity these substituted benzene derivatives (anisole, toluene, chlorobenzene, benzaldehyde, and nitrobenzene) toward the electrophilic aromatic substitution. Benzene
7.339 Benzene
III. Propose an electron-pushing mechanism for each of the reactions listed below. Provide an explanation for the regioselectivity based on the resonance struct...
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Utah State - CHEM - 2320
Project 3 of Chem 2320 Honorary I. Propose an electron-pushing mechanism for each of the following reactions. 1.O CO2 O O H NH2NaNO2 HClO H CO22.O OH O O OCH3 H2N+DCCN H OOCH3NDCC =CN3.CH3 H N N CH3 H N+H2SO4CH3+ + N
Utah State - CHEM - 2320
Project 4 of Chem 2320 HonoraryI. Propose a multi-step synthetic scheme (route) for the preparation of your designated compound. Feel free to use any reagents, for example, Lewis acids, catalysts, reductive agents or oxidative agents described in yo
Utah State - CHEM - 2320
Utah State - CHEM - 2320
Utah State - CHEM - 2320
Utah State - CHEM - 1120
Syracuse - IDE - 656
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Utah State - CHEM - 1120
Syracuse - IDE - 656
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Utah State - CHEM - 1120
Utah State - CHEM - 1120
Utah State - CHEM - 1120
Utah State - CHEM - 1120
Syracuse - IDE - 656
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Syracuse - IDE - 656
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Utah State - CHEM - 1120
Utah State - CHEM - 1120
Utah State - CHEM - 1120
Utah State - CHEM - 1120
Utah State - CHEM - 1120
Utah State - CHEM - 1120
Utah State - CHEM - 1120
Utah State - CHEM - 1120
Michigan - CHEM - 260
Chem 260 Professor Nils Walter Calendar of Due Dates etc.SundayMondayTuesdayWednesdayThursdayFriday 1SaturdaySeptember20012345 L1 Intro to QM67 L2 QM8910 L3 QM1112 L4 QM1314 L5 Atoms15161723HW1 L6
Utah State - CHEM - 1120
Michigan - CHEM - 260
Chem 261 Professor Nils Walter Calendar of Due Dates etc.SundayMondayTuesdayWednesdayThursdayFriday 1SaturdaySeptember20012345 L1 Intro to QM67 L2 QM8910 L3 QM1112 L4 QM1314 L5 Atoms15161723HW1 L6
Utah State - CHEM - 1120
Utah State - CHEM - 1120
Michigan - CHEM - 260
Utah State - CHEM - 1120
Michigan - CHEM - 260
Cohesion: The Lennard-Jones(12,6) PotentialIn summary:C V = 6 rAttractive forces Repulsive forces C* (Pauli exclusion V + n ; n > 6 r principle!) Easiest to compute: n = 12 Nils Walter: Chem 260 12 6 V = 4 r r The applic
Michigan - CHEM - 260
Vibrations of polyatomic molecules: How can one describe them?CO2: C-O stretch vibrations are NOT independent (cannot be excited independently) Normal stretch modes (linear combinations of C-O stretches) ARE independentinactivesymmetricNils Walt
Michigan - CHEM - 260
Vision-to-* rhodopsinn2h2 En = 8mL2Nils Walter: Chem 260FluorescenceJablonski diagramDissipation in environment as heat = internal conversionVibrational states Excited electronic statefsecnsecIf colliding molecules cannot accept this
Michigan - CHEM - 260
Nuclear Magnetic Resonance (NMR)Atkins, Chapter 19Many nuclei possess a spin angular momentum (depending on the number of protons and neutrons) they behave like magnets with spin quantum number I; their spins may have different orientations mI =
Michigan - CHEM - 260
Fine structure: Multiple equivalent nuclei2 X nuclei: 3 X nuclei:1st X nucleus splits by J 2nd X nucleus splits by J 3rd X nucleus splits by J A2 X31st A nucleus splits by J 2nd A nucleus splits by JNils Walter: Chem 260Fine structure: Values
Utah State - CHEM - 2300
Utah State - CHEM - 2300
Utah State - CHEM - 2300
Utah State - CHEM - 2300
Utah State - CHEM - 2300
Michigan - CHEM - 260
Non-ideal solutionsStrong deviations from ideality are shown by dissimilar substances Raoult's law obeyed for a close-to-pure solventWilliam Henry (1775-1836) observed Henry's law (for a dilute solute): pB = xBKB (e.g., gas solubility)Nils Walte
Utah State - CHEM - 2320
Michigan - CHEM - 260
Acid and base strengthK a Kb = a A- a H O +3aHA a A-aHA aOH -conjugate base3= aH O + aOH - = K w pKa + pKb = pKw As the strength of an acid decreases, the strength of its conjugate base increases and vice versaKa > 1, pKa < 0: stro
Michigan - CHEM - 260
For elementary reaction steps the rate law can be inferredunimolecular elementary step A products d[A] Rate = - = k[A] dtbimolecular elementary step A + B products d[A] Rate = - = k[A][B] dtMolecularity: Number of particles coming together to
Utah State - CHEM - 2320
Utah State - CHEM - 2320
Utah State - CHEM - 2320
Utah State - CHEM - 2300
Chem 2300 Exam 1 September 29, 2006Name: (First) (Last)(Please print)Last 4 digits of Banner No.ScoreI. Multiple Choice ( /20)/60 /20 /20 /100IIIII Total scoreNote: Periodic table is on the last page.1I. Multiple choice questions
Utah State - CHEM - 2300
Chem 2300 Exam 2 October 27, 2006Name: (First) (Last)(Please print)Last 4 digits of Banner No.ScoreI. Multiple Choice ( /20)/60 /20 /20 /100IIIII Total score1I. Multiple choice questions (3 points each). Write down your answer in
Utah State - CHEM - 2300
II. Use the table (next page) and provide the correct structures of compounds and reagents for the following reactions. No partial point will be awarded if you place your answer in the wrong box. (20 points)ClReaction 1:+CH3OH methanolA+
Utah State - CHEM - 2300
Chem 2300 Exam 3 November 29, 2006Name: (First) (Last)(Please print)Last 4 digits of Banner No.ScoreI. Multiple Choice ( /20)/60 /20 /20 /100IIIII Total score1I. Multiple choice questions (3 points each). Write down your answer in
Utah State - CHEM - 2300
II. Using the table on the next page, provide the correct structures of compounds and reagents. No partial point will be awarded if you place your answer in the wrong box. (20 points)NO2 CH3 HO3S A CH3 C CH3 B CH3Na2Cr2O7 H+, heatICH2CH3II
Utah State - CHEM - 2320
Utah State - CHEM - 2320
Utah State - CHEM - 2320
Utah State - CHEM - 2320
Utah State - CHEM - 2320
Utah State - CHEM - 2320
Utah State - CHEM - 2320
Utah State - CHEM - 2320
Utah State - CHEM - 2320
Chem 2320 Exam 1January 26, 2006Name: (first) (last)(Please print)Last 4 digits of I.D. _ _ _ _ I. Multiple Choice ( /20)Score /60 /15 /25 /100IIIII Total score1I. Multiple choice questions. (3 points each). Please put your answers