Physical constants 5 4. SI prefixes‚ their symbols and values 5 5. 1H 6. 13C 7. Infrared absorption data 8. 2-amino acids (α-amino acids) 8–9 9. Formulas of some fatty acids 10 NMR data NMR data 5–6 7 7 10. Structural formulas of some important biomolecules 10 11. Acid-base indicators 11 12. Acidity constants‚ Ka‚ of some weak acids 11 13. Values of molar enthalpy of combustion of some common fuels
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The experimental melting point range of the desired alkene product‚ trans-9-(2-phenylethenyl) anthracene‚ was found to be 132-134 ˚C‚ in comparison to the literature value melting point range of 130-132˚C‚1 it was slightly higher than expected. Overall‚ the experimental melting point range varied from the initial melting point temperature and maximum melting point temperature by 2˚C. As the experimental melting point had a small range of temperature variance and was above that of the literature value
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time-resolved attenuated total reflectio Fouriertransform infrared spectroscopy. Proc. Natl. Acad. Sci. USA 96‚ 5498– 5503. 8. Jeng‚ M.-F.‚ and Dyson‚ H. J. (1996) Direct measurement of the aspartic acid 26 pK a for reduced Escherichia coli thioredoxin by 13 C NMR. Biochemistry 35‚ 1–6. 9. Qin‚ J.‚ Clore‚ G. M.‚ and Gronenborn‚ A. M. (1997) Ionization equilibria for side-chain carboxyl groups in oxidized and reduced human thioredoxin and in the complex with its target peptide from the transcription factor NFκB
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SEPERATING CYCLOHEXANE AND TOLUENE BY DISTILLATION Aim: Separate two miscible liquids‚ either by macroscale or microscale process‚ using simple and fractional distillation. Compare the efficiencies of simple and fractional distillation. INTRODUCTION: The purpose of this experiment is to learn how to separate two miscible liquids by microscale process. There will be use of simple and fractional distillation. Simple and fractional distillation efficiencies will be compared. The student should have
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Chapter 1 MULTIPLE CHOICE QUESTIONS Topic: Atomic Orbitals 1. A) B) C) D) E) In quantum mechanics a node (nodal surface or plane) is: a place where Ψ is negative. a place where Ψ is positive. a place where Ψ = 0. a place where Ψ2 is large. a place where Ψ2 is negative. Ans: C Topic: Atomic Orbitals‚ Molecular Orbitals 2. When the 1s orbitals of two hydrogen atoms combine to form a hydrogen molecule‚ how many molecular orbitals are formed? A) 1 B) 2 C) 3 D) 4 E) 5 Ans:
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Bromination of trans- Stilbene to form 1‚2- Dibromo- 1‚2-diphenylethane Abstract 1‚2-dibromo-1‚2-diphenylethane was produced by the bromination of trans-stilbene through the addition of hydrobromic acid (HBr) and hydrogen peroxide (H2O2). This experiment was a greener bromination of stilbene because bromine was generated in situ and ethanol was used as the solvent. The melting point (243.30°C)‚ mass (.427g)‚ and percent yield (45.54) of the crystals were recorded. The FTIR
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Experiment 13: Synthesis of 1-Bromobutane An SN2 Reaction Experiment #13: Synthesis of 1-Bromobutane an SN2 Reaction Introduction: In order to synthesize 1-Bromobutane an alkyl halide must be present to undergo a nucleophilic substitution reaction of an alcohol. Since 1-butanol is a primary substrate it will undergo an SN2 reaction with sodium bromide in order to convert the alcohol group to water which is a better leaving group and will in the end produce 1-bromobutane. Experimentally
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Compound 50‚ like its known analogue 3‚ involves an α‚β-unsaturated ketone‚ an acid-sensitive reactant‚ which prevents its direct synthesis in presence of protic solvents by refluxing. Despite of this characteristic‚ 50 was formed smoothly in 5 minutes by grinding chemistry‚ solely as E-isomer‚ without any evidence of decomposition after 1H and 13C MNR analysis. This synthetic approach provides easy access to such α‚β-unsaturated N-acylhydrazones‚ which are building blocks in the synthesis of nitrogen-containing
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modes associated with them‚such as symmetric and asymmetric stretches‚bends‚ rocks‚ and tortional modes. For MRZ‚ the C-H stretching Vibrations are observed at 3057‚ 3043‚ 3016 and 2999 cm-1. The asymmetric and symmetric stretching bands of CH2 are observed in the range from 2900 to 2700 cm-1 and this stretching band is mainly coupled with the CH3 stretching vibration. Mirtazapine has only one CH3 group. The C-H stretching vibrations of methyl are observed between 3000 and 2900 cm-1. A methyl group
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Environmental Chemistry; Copper kinetics in estuaries Later work: Calcium and magnesium binding to blood coagulation proteins Ph.D. – U. of Illinois; Oscillatory enzyme kinetics NMR Lab Director; see web page ( http://scs.illinois.edu/nmr/ ) 11 magnets‚ 350 users‚ 4 locations in RAL‚ Noyes‚ CLSL NMR Lab tours later in the semester if you ask Getting Acquainted – Chem 223 Who are you? On the 4 x 6 card‚ give us: Name and e-mail address or phone number or means of contact Where
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