Question 6: Suggest a structure of a compound that would fit with the spectra and the molecular information given. CSH12 Use the space below to justify your reasoning. 10 8. 6. 4 3 2 1 ppm

Why is the IR spectrum of a gaseous compound more complex than the same compound in liquidor solid state?

Counterfeit drugs are a common problem in developing regions of the world. Oftentimes, counterfeit pills are made with compounds such as lactose. A lab technician has obtained the IR spectrum shown above for a sample reported to be citalopram, an antidepressant drug. Does the IR spectrum belong to citalopram or lactose? Explain your answer by describing what feature of the IR spectrum confirms your choice and describe what feature is missing from the IR spectrum for the other compound. A. citalopram B. lactose

The mass spectrum of an unknown compound has a molecular ion peak with a relative intensity of 52.18% and an M+1 peak of 3.37%. How many carbon atoms are in the compound? (Fill in an integer number)

1: Determine nominal m/z value peak 2: Assign the X+2 elements except oxygen (Br, Cl, Si, S) FIRST 3: Assign the X+1 elements (C & N) If N is known to be present, start with N remember to normalize X+1 to X, if necessary (when the X peak is not the base peak in the isotopic cluster) 4: Assign the atoms of oxygen after assigning number of C atoms because of the X+2 contribution from carbon6 can influence the assignment of the number of O atoms 5: Assign the X elements (hydrogen7 , F, P, I) 6: From the elemental composition, determine R+db 7: Propose a possible structure

1.Calculate the theoretical yield of acetylsalicylic acid from the given starting amount of salicylic acid. Show the calculation with units.   Given: 1.4 g of your salicylic acid product in a 125 mL Erlenmeyer flask; record the weight Next, briefly explain if possible:What key change do you expect to see in the IR spectrum when the salicylic acid starting material is converted to the acetylsalicylic acid product?And or: What key change do you expect to see in the 1H NMR spectrum when the salicylic acid starting material is converted to the acetylsalicylic acid product?

UV absorption detectors can also be used in ion chromatography for the measurement of ions such as nitrite and nitrate but cannot be used to detect ions such as fluoride and chloride. Why? Select the correct response from the list below Nitrate and nitrite contain oxygen ions and as a result they absorb in the UV region of the spectrum. Fluoride and chloride do not contain any oxygen so don't absorb in the UV region Nitrate and nitrite contain N=N groups so they absorb in the UV region Fluoride and chloride do not contain any double bonds so don't absorb in the UV region Nitrate and nitrite contain chromophores and as a result they absorb in the UV region of the spectrum. Fluoride and chloride do not contain any chromophores so don't absorb in the UV region Nitrate and nitrite contain nitrogen ions and as a result they absorb in the UV region of the spectrum. Fluoride and chloride do not contain any nitrogen so don't absorb in the UV region

A researcher is studying cytochrome oxidase, a protein that uses iron to bind diatomic oxygen. She collects two IR spectra, shown below. In the first spectrum, no isotopic labeling is used (top). In the second, 160 has been replaced with 180 (bottom). 820 655 790 0.5- 714 695 733 820 655 755 0.5- 714 695 733 0- 600 650 700 750 800 850 Vo (cm") Based on the above ratio, which is the most likely source of this vibration, (a) the Fe-O stretch in Fell-O=0, or (b) the O-O stretch in Fell-O=O? You can assume that the atomic weight of Fe is 56. % Transmission

P Search Nick Bui NB Infrared Spectroscopy Worksheet by Nick Bui - Last Modified: Sun at 3:42 PM - Design Layout References Mailings Review View Help Insert Draw O Find - AaBbCcDd AaBbC AaBbC AaBbCcDd AaBbCc 1 No Spac. Heading 1 * 14 - A A Aa v A E-E - Tahoma E Replace Subtitle 信。 。国 I 'U - ab x x A A 三目三三三。 1 Normal Title A Select - t Painter Styles Ed Font Paragraph Correlation Chart for Functional Groups in Infrared Spectra (Group Activity) Tyrese Ham 600 Name and structure 4000 3500 2500 2000 1800 1600 1400 1200 1000 800 3000 cm cm cm cm cm of the compound cm cm ст cm cm Isooctane Cyclododecene 2,4,4-trimethyl-1- pentane Ethyl benzoate Butyl acetate Cyclohexanol Ethylbenzene 2-butanone Ethyl acetate Methyl acetate Methylcyclohexane diphenylmethane Trans- cinnamaldehyde ords D Focus pe here to search 82°F PrtSch Home