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- In an IR spectrum, which of the indicated C-H bonds exhibits a stretching absorption at the largest wave number? II IV II 1) I 2) || 3) |II 4) IV I-O-IIn an IR spectrum, which of the indicated C-H bonds exhibits a stretching absorption at the largest wave number? C-H -H II IV II 1) | 2) || 3) II 4) IV5. Using the letter designations, rank the following compounds from lowest carbonyl stretching frequency to highest. A Jol lowest B d C highest
- Without counting hydrogens, determine which one of the following CANNOT be the unknownmolecule with molecular formula C7H8NOBr , and explain your reasoning.Indicate the relationship between each pair. Choose from: configurational stereoisomers,conformers, constitutional isomers, or different formulas (Each term is used at least twice.)Draw the following molecule as both the (a) most stable Newman projection and (b) the Fischer projectio ОН O.
- ▼ Part A Identify the structure with a stereocenter that is R. O NH₂ H |||| H Fami H An NH₂ four NH₂If the sample of the pure R enantiomer of a molecule has a specific rotation of -40 degrees and your mixture of that molecule has an 82% ee S, what is the observed specific rotation of your sample?BONUS! Draw the Newman projection of the following molecule as viewed along the C=O bond (it may be helpful to construct a model). ⒸOH ОН
- At room temperature, the 'H NMR spectrum of all-cis-1,2,3,4,5,6-cyclohexanehexacarboxylic acid exhibits two signals for the H atoms directly bonded to the ring. Explain why. Hint: Draw its chair conformation explicitly. CO,H HO,C .CO2H HO,C* *CO2H CO,H1. The energy of a photon is. proportional to its wavelength and proportional to its frequency. (directly or indirectly) 2. Which of the following has a lower characteristic stretching frequency, the C O bond or the C-O bond? Explain briefly. C=0 3. Ethyne HCECH does not show IR absorption in the region 2000-2500 em-! because. 4. Which statement best explains why a carbonyl absorbs infrared radiation at a higher frequency than an alkene absorption?to Medical Chemistry II. (BMC1CHEM02) oard / My courses / Introduction to Medical Chemistry II. (BMCICHEM02) / 29/03 2021 Chemistry Electronic te Electronic test in Chemistry n3 Cyclobutane is more stable molecule than cyclopropane, because.... Select one: ut of it has less angle strain. cyclobutane has a cis-trans stereoisomers. cyclobutane is a larger ring. it has more torsional strain. cyclopropane is planar. Next page
