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What are the uses of NMR in new drug discoveries?
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- Dr. Waybell designs a study to investigate whether the dose of melatonin taken before bed impacts people's moods. Dr. Waybell rejects Ho and computes 7²=0.05. She has made a Type Il error. O Dr. Waybell retain reject Ho and computes n=0.005. She has made a Type Il error. O Dr. Waybell rejects Ho and computes 7=0.005. She has made a Type Il error. Dr. Waybell retain reject Ho and computes n=0.05. She has made a Type Il error.Which of the five dyes tested in this experiment has the strongest ability to absorb light? How do you know?4 ¹H-NMR Spectra 1 3) M.F. = C₂H₂OBr 21 21 3 2) 2 PPM
- What are the Rf values for Asprin, Acetaminophen, and Caffeine?5. A sample of a red dye and a sample of a blue dye both have the same concentration. Their Absorbance is measured using the same spectrophotometer. At a particular wavelength, will both samples give the same Absorbance reading? Why or why not?Assume you are running a forensic laboratory. Use the table of Rf values below to determine the answer to the following question. Rf Values of Drugs in Various Solvent Systems Drug Solvent 1 Solvent 2 Solvent 3 Morphine 0.10 0.08 0.10 Quinine 0.07 0.26 0.19 Codeine 0.16 0.53 0.38 Cocaine 0.65 0.90 0.73 Strychnine 0.28 0.76 0.53 Aconitine 0.35 0.90 0.68 Reserpine 0.75 0.80 0.72 A sample seized by the police in a drug smuggling case and suspected to contain Morphine, Cocaine and Aconitine. Which solvent (1, 2 or 3) should be used as the developing solvent? Justify your answer.
- A compound of formula C5H12 gives 1 signal in the 1H NMR and 2 signals in the 13C NMR. The compound is a. pentane.b. 2-methylbutane.c. 2,2-dimethylpropane.d. Cannot tell without more information.What is the Rf value and what is the advantage of calculating Rf value? Explain.Many television crime shows depict forensic investigators using spectroscopy to detect the residue of bodily fluids at crime scenes. How does spectroscopy detect this residue?
- Applications of NMR spectroscopy in pharmaceutical analysis Can potentially be used for fingerprinting mixtures Has good potential for non-destructive quantitative analysis of drugs in formulations without prior separation Can determine impurities, including enantiomeric impurities, without separation Powerfull technique for the characterization og the exact structure of raw materials, intermediates, and finished productsTwo of the chemicals, n-pentane and 1-butanol, had similar molecular weights but likely had significantly different Dt values. Explain this difference, referring to the IMFs involved.How can you distinguish aldehydes, esters and carboxylic acids using IR spectra? Explain using specific examples.