Given: A mixture of compounds A and B is spotted on a TLC plate; after developing the plate, the spots traveled the following distances: A = 20.4 mm and B = 36.5 mm; the solvent traveled 50.5 mm up the plate. a) Calculate the Rf value for A and B (show calculations). b) Based on the Rf value, which compound, A or B is more polar? Explain why. (Answer A and B

Q: 1. Why compounds have different Rf values? Because they have different (Select) 2. The stationary…

A: Since it is a multiple subparts questions, according to Guidlines here I am solving first three…

Q: Analyze the IR for the molecular formula C8H8O3 (vanillin). List only the relevant absorbancies (it…

A: Question is based on the concept of IR spectroscopy. we need to analyse the spectra.

Q: Please solve question 1 using the mass spectrum of propiophenone.

A: Mass spectrometry is mainly used for determination of molecular weight and molecular formula of a…

Q: 2. Calculate these differences a) M•+ fragments to 71 m/z; what does this loss represent? b) M•+…

A: The ratio m/z represents the mass to charge number ratio. In spectroscopy. The M+ peak is usually…

Q: 1. a compound has an Rf value of 0.97 diethyl ether but an Rf value of 0.045 in cyclohexane. Suggest…

A:

Q: Question from at-home practice questions: Use the IR spectra attached below. Is a carbonyl present?…

A:

Q: 5. Calculate the Rf values for compounds A and B from the following data: Distance Traveled: 11.0cm…

A: Since, Rf value or retension value is the ratio of distance travelled by the compound to the…

Q: 15. (5 pts.) Assign the peaks in the infrared spectrum of salicylic acid (below) with frequencies…

A: Some important and characteristics IR peaks of salicylic acid are discussed below :  A. Broad medium…

Q: Explain why this is correct. Also explain what a chromophore is and what is its distinigusiing…

A: Thin layer chromatography (TLC) is a method of separating components of the mixture. It is based on…

Q: Please see attached image and please choose a structure (also attached) that matches the IR spectrum…

A: The structure of the unknown compounds is determined by analyzing the spectroscopical data such as…

Q: Describe the four types of information that is provided by a H1 NMR spectra.

A: The information we get from the 1H NMR are discussed as : 1) The number of signal sets      The…

Q: IR Of the following compounds, which best matches the given IR spectrum? 100 60 20 4000 3500 3000…

A:

Q: 4) A mixture of three compounds A, B, and C spotted on an alumina TLC plate gives the following Rf…

A:

Q: With reference to the IR and NMR spectra of ethyl 4-aminobenzoate (benzocaine) given below, answer…

A: A question based on IR spectroscopy of organic compounds. An IR spectrum is prescribed based on that…

Q: Compound X is developed on a TLC plate using a 3:1 heptane:acetone eluent mixture. The same compound…

A:

Q: ography xperiment to longest. (If A is shortest, then B, C and D is longest, enter ABCD ) A C D CH3…

A: Thin-layer chromatography(TLC): This technique is used to separate the mixture of non-volatile…

Q: Question 1: Interpret as many of the main peaks in the following spectra as you can – do this by…

A: steps to interpret the mass spectra:look for molecular ion peakThe peak will highest mass peak in…

Q: a) A developed TLC plate is shown. Calculate the Rf of the spot. Please show work. b) If the…

A: Rf factor of the spot = Distance travelled by the compound / Distance travelled by the solvent    =…

Q: Assume that compounds A and B have Rf values of 0.4 and 0.6, respectively. How far will each of…

A: Given :                 Rf value of compound A = 0.4                 Rf value of compound B = 0.6…

Q: In this IR - what functional group is being shown?(carboxylic acid, ester, amide, acid anhydride, or…

A: From the give IR spectra, one can guess the different types of bonds present in the unknown…

Q: Shich will have no effect on an Rf value in TCL?

A: We have to tell which option is correct from given choices of options

Q: You can predict that the locations of the peaks of the IR spectra of acetone and 2-butanone would…

A: The given compounds are acetone (CH3COCH3) and butan-2-one (CH3COCH2CH3).We have to tell about their…

Q: Choose the molecule that is most likely to produce a spectrum with these IR frequencies: v = 3370,…

A: The question is based on the concept of organic spectroscopy. We need to analyse the spectral data…

Q: In a mass spectrometric study of nitrogenous aromatic compounds, a peak at m/z - 39 was found for 17…

A: Given:-

Q: 7. The ir and MS for a compound are shown below. Identify the compound. Clearly show your reasoning.

A: A question based on IR and mass spectrum that is to be accomplished.

Q: HO. a) Which of the compounds would you expect to travel up the TLC plate the quickest and have the…

A:

Q: This is the TLC of syn-azobenzene (A for both plates since it was under UV light) and…

A: It is unusual for a more polar compound to have a higher Rf value and travel further than a less…

Q: 2. A student spots a mixture of the following compounds on a TLC plate and uses a 50:50 mixture of…

A: It can be said that Rf factor totally depends on polarity of the compound and defined as a ratio…

Q: How would you change the mobile phase to decrease the Rf for both spots? If you started with 1:10…

A: Given Rfa = 0.70 and Rfb = 0.20. Solvent System 1:10 ethyl acetate to hexane

Q: 4. (a) Chemical shift (8) value of CH and CH3 proton in [Al(acac);] are 1.99 and 5.47 ppm,…

A: This question is based upon Inorganic NMR Spectroscopy. The splitting pattern has to be calculated…

Q: Question 2: - 3 for ¹H NMR and 2 for 1³C NMR)) Please draw the ¹H-NMR and 13C-NMR spectra for the…

A:

Q: Clures Bf the fw6 Holecules. How could IR spectroscopy be used to distinguish between the following…

A: Given ,  1 compound has carboxylic acid and alcohol while 2nd has ether and aldehyde functional…

Q: Finally, what if you have a chromatogram of an amine (polar) and an ether (fairly non-polar). Would…

A: As we know, Like dissolves like that means polar compound are soluble in polar solvent while…

Q: I request to experts kindly solve this question for me. Kindly write all details while you are…

A: Since you have asked multiple questions, we will solve first three questions for you. If you want…

Q: contain

A: Rf value = ( distance traveled by the solute / distance traveled by the solvent )  When we take less…

Q: Circle one of the 5 compounds that would best match the IR and Mass spectra below. 57 Abundance 71…

A: Given Infrared spectra values- 1715,2940,2978,1121, 956, 1170, 1460, 1357 etc...  and given Mass…

Q: Chemistry Can someone explain to me where the base peak for an ester on mass spectrometry is? I…

A:

Q: 14.47 The following is a mass spectrum of octane. (a) Which peak represents the molecular-ion? (b)…

A:

Q: 0/50 mixture of cyclohexanamine and cyclohexane and asked NH₂ Cyclohexanamine Cyclohexane onent of…

A: Given: 50/50 mixture of cyclohexanamine and cyclohexane

Q: a.)  Calculate the Rf value: If the unknown pigment has travelled a distance of 0.25 cm and the…

A: ( a) part Pigments are dissolved in a solvent and then allowed to run on a special paper. Then the…

Q: What may have happened if you didn’t dilute the unknown sample and proceeded to measure the…

A: The importance of dilution in the measurement of absorbance to determine the concentration of…

Q: Which solvent would give the lowest Rf for this drug on a TLC plate? (a) Ethyl methyl ether (b)…

A: Thin layer chromatography (TLC)  is a method of separating components of the mixture. it is based on…

Q: annotate the IR Spectrum (including the C-Cl stretch and everything after finger-print region)

A:

Q: (5) C¿H5B1 3 2 4 3 2 PPM

A: (·) spliting due to Neighbowring proton = (2nI+1)       n → No . of equivalent Hydrogen       I  →…

Q: Calculate the Rf value for each spot present in each lane? Show sample calculation. 2. How many…

A: “Since you have posted a question with multiple sub-parts, we will solve the first three subparts…

UV Visible Spectroscopy

Spectroscopy refers to the absorption or emission of light or other radiations by matter. When a substance or chemical absorbs light or radiation, they reach an excited state followed by de-excitation or emission of the light or radiation forming distinct spectra. UV-visible spectroscopy or  ultraviolet-visible refers to the absorption and emission in the ultraviolet and visible regions of the electromagnetic spectrum.