Which compound(s) in spearmint oil do you expect will be visible on the TLC plate under UV irradiation? Explain why. Compounds:R-carvone, R-limonene and (1R,2R,4R)-dihydrocarveol
Q: The chromatographic purification of 1 g of (-)-ethyl lactate with an ee of 85% yields the optically…
A:
Q: Here is an IR of another monoterpene, this one isolated from steam distillation of marjoram. Which…
A: Characteristic peaks for OH str in IR = 3300-2500 cm-1 Characteristic peak for C=O str in IR = 1700…
Q: Do you expect benzaldehyde or stilbene to travel farther on a TLC plate? Please explain, being sure…
A: "Since there are multiple questions and it is not mentioned that which one has to be solved so I am…
Q: When free in solution (i.e., not bound to opsin), both all-trans and 11-cis retinal have absorption…
A: The geometry of the molecule may be changed by the exposure of light, that is, compound can be…
Q: A 0.300 g tablet of levetiracetam is dissolved in 7.50 mL of acetone and placed in a sample cell…
A: Given: The specific rotation of levetiracetam, [α]=-93.4 Mass of tablet=0.300 g Volume=7.50 mL…
Q: Qs4. This is a TLC analysis of 3 individual compounds. The plate was run in 20 % ethyl acetate, 80%…
A:
Q: 6. Discuss briefly why the following TLC experiments were not performed properly A B 7. Arrange the…
A: TLC means “Thin Layer Chromatography”. This experiment is done on Wattman paper. If the molecule has…
Q: Which of the following techniques would be best to distinguish acetylferrocene and naphthalene?…
A: A question based on polarity of a molecule, which is to be accomplished.
Q: Interpret the following TLC results based on the addition of bromine to stilbene. Do the TLC data…
A: The alkene functional group is identified by the presence of a carbon-carbon double bond. For…
Q: If a compound appears single spotted on a TLC, it indicates that the compound is
A: The technique of separating components present in the mixture is termed as chromatography.…
Q: Select which type of GC column is best suited to analyze a mixture containing o-xylene, m-xylene,…
A: The method of separating a compound which can be vaporized without the decomposition process and…
Q: Please circle down the compound that should moved further (higher Rf) in a TLC. он он Please…
A:
Q: 4. Draw the chemical structure of the following compounds, and then arrange these compounds in order…
A: The chemical structure for the propanoic acid, 2-propanone, propane, and 2-propanol are shown below.
Q: how would the Rf values change if eluted with hexanes using an alumina TLC plate?
A: In chromatography, a stationary phase is a solid, or a liquid supported on a solid (e.g. silica) and…
Q: Higher Rf value will be obtained from dextrin than that of glucose in a reverse-phase TLC.
A:
Q: Briefly explain what you would expect the result to be of the following scenario: You have two…
A:
Q: 7. Dihydrocarveol is another natural product found in spearmint oil, but in minor amounts.…
A: The given compound is dihydrocarveol. It is naturally found in caraway oil and mint oil. It is a…
Q: Why is there a need to wash the residue (which could be CaC2O4) twice with water before the addition…
A: Answer - According to the question - The washed liquid must be a substance which does not interfere…
Q: A fresh TLC plate is spotted with compound A,B and C, but with methylene chloride as a solvent. How…
A: The solution is given below -
Q: Answer the question below directly. Why methanol is a good solvent for UV but not for IR?
A: Methanol acts as a good solvent in UV but not in infrared spectroscopy. This is because of its…
Q: Select which type of GC column is best suited to analyze a mixture containing o-xylene, m-xylene,…
A: The isomers of xylene i.e., o-xylene, m-xylene and p-xylene are difficult to seperate from each…
Q: For this experiment depicted in the picture, Interpret the most important absorbances in the IR…
A: A question based on IR spectrum, which is to be accomplished.
Q: What is the formaldehyde emission rate of fiberwood?
A: Answer - formaldehyde emission - A colourless and strong-smelling gas, formaldehyde is naturally…
Q: If we were to use Toluene as a solvent in a TLC with benzophenone, diphenyl methanol, and biphenyl…
A: TLC has two states - stationary phase and mobile phase. Here Toluene is used as non polar solvent as…
Q: 1. Theoretical questions a. If two compounds have the same Rf under identical TLC conditions, does…
A: since you are posted a multiple questions we are entitiled to answer only first question, if u get…
Q: Why methanol is a good solvent for UV but not for IR?
A:
Q: Which compound would you be most likely to visualize using UV-light on a TLC plate? Why? How might…
A:
Q: он он
A: The answer is given as follows
Q: o-dichlorobenzene and p-dichlorobenzene can be separated by TLC. Which compound is more polar? Which…
A: Since you have posted multiple questions, the answer for first question is given below. Kindly…
Q: (a) Draw the curly arrow mechanism to show bonds being broken/formed (b) Comment on the polarity of…
A: (a) The curved arrow mechanism is shown below
Q: Consider the two compounds below. Which one is more polar? Which one would you expect t travel…
A: A question based on polarity of the organic structures, which is to be accomplished.
Q: The mixture below is seperated using HPLC with a octadecylsiloxane (nonpolar) stationary phase and a…
A: In HPLC, the components are separated on the basis physicochemical interactions. If the solute is…
Q: Which compound will have the largest Rf value on a TLC plate using 10% ethyl acetate/hexane as a…
A: Retention factor is also called Rf value. In thin layer chromatography (TLC) Rf value is the measure…
Q: Calculate the % ee of a mixture containing 80% of one enantiomer and 20% of the other? A. 80 B. 120…
A: % ee = % of major enantiomer - % of minor…
Q: Considering the observed rotation value indicated in the table, and considering that the measurement…
A:
Q: 12. To see plant pigment extracts or pigments such as carotene on the TLC plate: a. One has to use…
A: Thin-layer chromatography is used to identify the product formed during the reaction or check the…
Q: In 250 ml ethanol solution, a tablet of saccharin was dissolved, and it was measured by UV…
A: Beer's law states that the absorbance is directly proportional to the concentration of the absorbing…
Q: The method used by TSA to detect organics is typically... O HPLC Absorption of visible light Mass…
A: The answer is Mass Spectrometry
Q: why do you treat the tlc with 5% sulfuric acid in ethanol.
A: TLC or Thin Layer Chromatography is a chromatographic technique which is used to isolate and…
Q: Which of these alternative reactants react with Kco, 2-hydroxybenzoic acid to form aspirin?…
A: A question based on synthesis of aspirin, which is to be accomplished.
Q: When you run a TLC plate with methyl orange and biphenyl, you observe very large, broad, streaky…
A: In TLC chromatography, the TLC plates (silica gels) are known as the stationary phase and the…
Q: Compare the IR of 2-ethyl-3-hydroxyhexanal and 2-ethylhex-2-enal. Note the most significant…
A: Infrared spectroscopy used in order to identify functional groups present in a compound
Q: Which will have the highest Rf value from a normal phase TLC? O chlorophyll O B-carotene O…
A:
Q: Chemistry 1.Predict the IR signal in the 1-bromo-3-ethylbenzene. (Approximate wave number for each…
A:
Q: IR spectrum of unknown alcohol 0.25 0.20 0 15 0.10- 0.05 0.00 0.05- -0.10- 0.15 -0.20 Absorbance…
A: We have given IR spectra of 2- Butanol The IR spectra tell you what types of vibrational modes the…
Q: Why saturated hydrocarbons show no Absorption in UV/VIS region (200nm to 800nm)?
A: The hydrocarbons which contain only single bonds between the atoms are known as saturated…
Q: Does 1-heptene, cyclohexane, limonene, toluene, acenaphthene, or p-xylene have any out of plane C-H…
A: Answer of the above question is given below.
Q: 5. Which of the following materials (B- E) could be used to carry out the optical resolution of…
A: Whenever a particular enantiomer is needed in pure form, an optically pure chiral molecule can be…
Q: Higher Rf value will be obtained from dextrin than that of glucose in a reverse-phase TLC. O True O…
A: Rf means Retardation factor. Rf value means the ratio of distance travelled by solute to the…
Q: 3. Ethyne HCECH does not show IR absorption in the region 2000-2500 cm because.
A: Hey, since there are multiple questions requested, we will answer first question. If you want any…
Which compound(s) in spearmint oil do you expect will be visible on the TLC plate under UV irradiation? Explain why.
Compounds:R-carvone, R-limonene and (1R,2R,4R)-dihydrocarveol
Trending now
This is a popular solution!
Step by step
Solved in 3 steps with 3 images
- During TLC, what is the stationary phase and what is the mobile phase?Both melting points and TLC rely on differences in non covalent forces. Explain the role of these non-covalent interactions in the final answer obtained (melting point and Rf value).Higher Rf value will be obtained from dextrin than that of glucose in a reverse-phase TLC. True False
- Is ether a good solvent for TLC? What would be expected to be seen on a TLC plate if 2,6-dimethylaniline was spotted on lane 1 and 2,6-dimethylnitrobenzene on lane 2 and developed in ether?1. Which compound will have the largest Rf value on a TLC plate using 10% ethyl acetate/hexane as a developing solvent: 3- decanone or 3- decanol, toluene or benzoic acid, cyclohexane or cyclooctanone? Explain why?if you wanted to makes the spots travel up the TLC plate further, what solvent ration would you choose and why? 1:2 Ethyl acetate/Hexane, 2:3 Ethyl acetate/ Hexane, or 1:1 Ethyl acetate/Hexane
- So I completing a lab report and one of the sections is on TLC analysis. In the experiment, the TLC plate was submerged in toluene ethylacetate and had spots of cinnamon leaf oil, cinnamon aldehyde, and cinnamon bark oil. 9 spots total were seen under the UV light, but different spots appeared following a vanillin stain. Why is this so and what does this mean?Chemistry 1)Arrange the following in order of increasing Rf in TLC? 3-pentanone, 3-pentanol,pentane.2) If all your Rfs were too large, what would you do to your solvent system to bring themdown?• What solvent(s) would you try next?3) What would happen if you spotted too much compound on your TLC plate?4) One of the compounds we are examining today has a chiral center.• Which one has a chiral center?• Identify it.Arrange the following solvents in order of increasing polarity (least polar to most polar): Propyl Amine – Diethyl Ether – Ethyl Acetate- Octane If you ran an unknown sample on a TLC and observed only one spot with a Rf value of 0.95, is it safe to assume that it is a pure compound? If not, how can you check it out using TLC?
- The TLC plate shown was run in 80:20 Petroleum Ether - Ethyl acetate. If the eluent is changed to 95:5 Petroleum Ether - Ethyl Acetate, what will happen to the R-values? All Rf values will decrease All Rf values will increase Some Rf values will increase Some Rf values will decreaseHow would you discuss method of separation and identification of compounds in TLC?b. Answer the questions about the compounds below. جو عید بھید A OH B i) Which compound would have the highest Rf value by TLC? ii) Which compound would have the lowest Rf value by TLC? iii) Which compound would elute first in column chromatography? iv) Which compound would elute last in column chromatography?
