Question 2 The following compound is with the formula C$H10O2. shows bands at 3450 cm1 broad and 1713 cm- strong in IR spectrum. Give its structure and assign the chemical shift values. CSH1002 chen 1.15 3.10 5.92 20
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- A colorless solid that melts at 103 to 105 C was subjected to IR Spectroscopy to determine the functional groups present and partially determine its nomenclature based on the molecular formula given. What are the functional groups present based on the major infrared absorptions? (Select Possible Answers)Mesityl oxide( (CH3)2C=CHCOCH3) shows two bands at 230 nm (12600) and 327 nm (98). But its isomer, ( CH2=C(CH)3-CH2COCH3) does not show any bands above 210 nm. Explain.Acrolein shows two bands at 210nm (11,500) and 315 nm(15).assign these bands.
- This is a ATR spectrum. In which caffeine/PVA films were measured. Line a) correspond to a pure pva film and the other lines are films at increasing caffeine concentration. Notice that the OH band at around 3200cm-1 decreases at higher caffeine concentrations. However at a certain concentration (line d) such band starts to increase back to the initial intensity. What does that mean? Waht is the chemical meaning for that behavior?Would a component with a larger Rf value have a higher or lower affinity for the mobile phase compared to a component with a smaller Rf value? Explain, using specific color spots from your data.A compound Y (150.0 g/mol) in a 1.00 cm quartz cell has an extinction coefficient (ε) of 23,150 at λmax=235 nm. What is the energy absorbed by the compound at the maximum of the peak? Note that hc=1.98644586×10−25J*m. Report your answer in KJ/mole to the correct number of significant figures. Do not include the units in your answer. Please write out steps, will rate. Thank you.
- 2. What are some of the factors that can make interpreting IR spectra more difficult and that should be considered to avoid band misinterpretation?Compound X was dissolved in a 5-mL volumetric flask. A 1.00-mL aliquot of the compound was placed in a 10-mL volumetric flask and diluted to the mark. The solution was read in a UV-Vis spectrophotometer and an absorbance of 0.427 in a 1.000-cm cuvette was observed at 340 nm. Solve the following question. Data for Compound X:Molecular mass = 292.16 g/molMolar absorptivity (ɛ) at 340 nm= 6130 M -1 cm -1 a. Calculate the concentration of compound X in the cuvette. b. How many milligrams of compound X were used to make the 5-mL solution?Compound X was dissolved in a 5-mL volumetric flask. A 1.00-mL aliquot of the compound was placed in a 10-mL volumetric flask and diluted to the mark. The solution was read in a UV-Vis spectrophotometer and an absorbance of 0.427 in a 1.000-cm cuvette was observed at 340 nm. Solve the following question. Data for Compound X:Molecular mass = 292.16 g/molMolar absorptivity (ɛ) at 340 nm= 6130 M -1 cm -1 1. What was the concentration of compound X in the 5-mL flask?
- Im having a hard time distinguishing peaks on an IR spectrum. Theyre often very crowded, and i dont know if broad peaks get combined with sharp peaks. On this IR spectrum, it seems there is a broad range, medium strength band extending from 4000 to (about) 2000 cm-1, with several sharp peaks on top of that range. Does this mean that there is a carboxylic acid O-H present as well as the other bonds determined by the sharp peaks?Silica gel is very polar stationary phase. Therefore, more polar molecule sticks to silica gel on the TLC plate and has higherRfvalue. True FalseTo resolve the Na D lines 591.0 and 591.5 nm, what resolution is required if this is first order?