Calculate the enantiomeric excess for the sample of (S)- ibuprofen sample and (R)-ibuprofen sample based on the data in attached image?

Q: p-dihydroxybenzene and o-dihydroxybenzene can be separated by TLC using a solvent of medium…

A: We know that in a TLC plate if we are using the non-polar solvent then it can form bonds (…

Q: Explain the process of Calculating Enantiomeric Excess ?

A: The absolute difference between the mole fraction of two enantiomers is termed as enantiomers.

Q: temperature

A: According to the question, Specific rotation of Pure (-)- mandelic acid = - 160 degree Observed…

Q: Use arguments based on resonance and electronegativity effects to explain the trend in carbonyl IR…

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Q: For each compound, determine whether the molecule has an internal mirror plane of symmetry. If it…

A: Chiral compounds are those which have non-superimposable mirror image. The compound does not show…

Q: Based on the IR spectrscopy, identify if the solid compound is 3-methyl-3-buten-1-ol, 1-octene,…

A:

Q: Why is the ΔHvap higher than ΔHfus for any given compound?

A: To explain : Why is the ΔHvap higher than ΔHfus for any given compound?

Q: Table 1 Table 1: " Beaker Moles of SCN Moles of FESCN2+ Concentration Absorbance at of FeSCN2*(M)…

A: We need to write the descriptive titles for the three tables.

Q: What are the functional groups of this FTIR spectrum?? if possible, what is the sample? could be…

A: A question based on IR spectroscopy that is to be accomplished.

Q: Which of the following arrow movements are wrongly ordered?

A: Tail to head of arrow in the mechanism of a chemical reaction shows the movement of electrons (from…

Q: What will be the multiplicity (splitting pattern) for the hydrogen in bold in this structure…

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Q: Write a short note on Symmetry-Allowed and Symmetry-Forbidden Pathways.

A: Since the type of reaction has not been mentioned, thus pericyclic reaction pathways are being…

Q: Dilute alcohol shows sharp stretch for OH group while neat alcohol shows broad OH stretch band.

A: Infrared spectroscopy is generally used for functional group determination in organic chemistry.…

Q: How many atoms share the unpaired electron in semiquinone?

A: The structure of semiquinone is shown below. The semiquinone is a radical, it means that it has one…

Q: If the optical rotation of a new compound is measured and found to have a specific rotation of +40,…

A: specific rotation is how  a compound can rotate plane polarized light. plane of polarized light…

Q: Copy the defined molecule structure and indicate the configurationabsolute value of each chiral…

A: We have to indicate the configuration absolute value of each chiral carbon. Attention, the…

Q: Indicate (no more than 2) for the following compound: Homotopic Heterotopic Enantiotopic…

A: If both the groups on a carbon atoms are same then 2 hydrogens attached to a carbon are homotopic.…

Q: Does the exclusion rule apply to C2H4?

A: The rule of mutual exclusion in molecular spectroscopy relates the observation of molecular…

Q: Describes which compound—ferrocene or acetylferrocene—is in the IR. Based on the data provided, do…

A: THIS COULD IR SPECTRUM OF ACETYLFERROCENE

Q: Considering the observed rotation value indicated in the table, and considering that the measurement…

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Q: Why is it necessary to resolve chiral pharmaceuticals (why cant we just use racemic versions)? What…

A: The separation of two enantiomers is called a resolution.

Q: Why is it necessary to resolve Chiral pharmaceuticals why can't we just use racemic versions in the…

A: The separation of the components of a racemic mixture is called chiral resolution. It is helpful for…

Q: Which of the following groups has the highest priority according to the Cahn- * ?Ingold-Prelog…

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Q: A hydrogen split by two equivalent hydrogens will give a triplet, while a hydrogen split by two…

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Q: Enantiomers can be distinguished using mass spectroscopy because they have different fragmentation…

A: Mass spectrometry uses ionisation method to form fragments of a compound and then give peaks…

Q: draw the RMN spectrum that you would expect to obtain for the compound Cl2CHCH2OCH3

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Q: Identify and count the interactions that destabilize the following conformation, and compute its…

A: We are given a Newman projection of an organic compound in staggered form.

Q: Based on the IR spectrscopy,  identify if the liquid compound is 3-methyl-3-buten-1-ol, 1-octene,…

A: The given spectrum is for benzophenone because in the ir spectra only possible functional group is…

Q: Can somebody explain the peaks for this HNMR and CNMR for deoxybenzoi

A: A question based on NMR spectroscopy that is to be accomplished.

Q: For the molecule below, a) Draw out every possible stereosimer.  b) Indicate any enantiomer pairs…

A: In given molecule 2 chiral Centres are present  Total stereoisomers is 4  In all molecule any…

Q: For each of the following molecular structures, circle each of the stereocenters (if any) that the…

A: The stereocenters are also called as Chiral carbon centres . To be a chiral carbon or stereocenter ,…

Q: Assign as many non-fingerprint region peaks as possible in anisole

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Q: Compute for the the Molecular Weight and Milliequivalent Weight of: Ammonium thiocyanate

A: Molecular weight: It is the weight of the compound that is obtained by adding the atomic weights of…

Q: Ir spectrum for cyclohexanol and the peaks on the graph identified with the board,strong,weak, and…

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Q: Calculate the specific rotation of the (S)-ibuprofen sample and (R)-ibuprofen sample based on the…

A: Given, Observed rotation of (S) - ibuprofen = + 0.54 degree Observed rotation of (R) - ibuprofen = +…

Q: circle each of the stereocenters (if any) that the molecule has then write the number corresponding…

A:

Q: What will be the optical rotation of a mixture of equal portions of (+)-MTPA and its enantiomer?

A: Racemic mixture  A mixture of equal proportions of two enantiomers, or substances with dissymmetric…

Q: - What patterns do you see in all of the compound models?

A: Pattern seen in formation of MgO

Q: What is saponification? 4 sentences required please

A: Saponification has to be defined.

Q: Can number 4 be cis, trans configuration too?

A: Here we have to predict whether the pair of stereoisomers are cis-trans configurations or not.

Q: What does it mean in IR spectra when a functional group has strong, medium, or weak intensity? Is it…

A: IR spectrum is basically a plot of transmitted (or absorbed) frequencies Vs intensity of…

Q: Using light scattering technique, an example of a nonideal interfering condition for a high-mass…

A: Given: Using light scattering technique, an example of a nonideal interfering condition for a…

Q: Please identify and assign the major stretching vibrations for acetyl eugenol.

A: Medium peak at 3063-3078 cm^-1 corresponding to aromatic C-H stretching vibration.  Medium peak at…

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.