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5) 4. Calculate the specific rotation for a substance that is at a conc. of 0.02...
5) 4. Calculate the specific rotation for a substance that is at a conc. of 0.02 /ml, and in a 2 decimeter tube gives an observed rotation of +12° 15) 5. For this molecule: a. How many chemically different hydrogens? b. How many chemically different carbons? C. What would be the mass of the molecular ion in El-MS? 10) 6. True or False: a. Chemical shifts, in ppm, are independent of the magnetic field strength. T F b. In HNMR,...
Chemical shifts, in ppm, are independent of the magnetic field strength. T F In HNMR, spin-spin splitting is the only way to tell how many hydrogens of each type. T F An IR spectrum is a unique "fingerprint" of a molecule. TF In MS, the identification of oxygen in a molecule is the main goal. TF he reference standard called TMS is trimethylsilane.
Pur eunnt ptic Rotut F c. Meso compound- A Compuina thestotuins 10) 2. Assign R or S to the two asymmetric.carbons shown below. matple Сиси, 5) 3. Place an asterisk (*) next to each asymmetri carbon in the molecule shown below. 5) 4. Calculate the specific rotation for a substance that is at a cqnc. of 0.01 g/ml, and in a 1 decimeter tut O72 (0-01 gim(19 observed rotation of -20° . 15) 5. For this molecule: он How many...
15) 5. For this molecule: a. How many chemically different hydrogens? b. How many chemically different carbons? c. What would be the mass of the molecular ion in El-MS?
15) 5. For this molecule: a. How many chemically different hydrogens? b. How many chemically different carbons? c. What would be the mass of the molecular ion in El-MS?
15) 5. For this molecule: SHCH a. How many chemically different hydrogens? b. How many chemically different carbons? c. What would be the mass of the molecular ion in El-MS?
10) 6. True or False: IR is used to tell how many chemically different types of hydrogens F T a. T F CDCI, is commonly used as an NMR solvent. b. T F Compounds with no nitrogen always have an even mass number. C. d. Aldehydes are easy to detect in HNMR. T F Neighboring hydrogens always show spin-spin splitting. T F e.
please explain how to solve 15) 5. In terms of the molecule shown below: -THESE Ha a. How many chemically different hydrogens does it have? _10 (but 9 is acceptable) b. How many chemically different carbons does it have? 11 c. What would be the nominal molecular mass in the El-MS?__190 (C13H130)
PART 3 For each set of data on pages 5-9, calculate and record the degree of unsaturation. Then use your problem solving skills to determine the chemical structure that is consistent with ALL of the data on each page. You are not required to label the spectra (but feel free to do so). This entire assignment is to be completed independently Suggestion for a general method to determine a chemical structure based on the provided molecular formula, IR, H-NMR and...
Please Help Do Not forget to explain please! Worksheet 4: Identification of Unknown Organic Compounds Reading: For a quick video about the "Rule of 13" https://www.youtube.com/watch?v=2YNE7w_GQIO Introduction One of the most important tasks that chemists are faced with is the separation and identification of compounds from mixtures. Gratifyingly, chemists have multiple tools in the quest to identify unknown organic compounds. Infrared spectroscopy is useful for determining functional groups that may exist in a molecule. NMR spectroscopy tells information about the...