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

Q: Calculate the enantiomeric excess for the sample of (S)- ibuprofen sample and (R)-ibuprofen sample…

A: Given, Amount of (S) - ibuprofen recovered from polarimetry = 0.745 g Amount of (R) - ibuprofen…

Q: Which of these projections has optical rotation of zero ?

A: In the question we are provided with three configurations ( of different molecules ). We need to…

Q: t preclude chirality.

A: Proper axis of  rotation is a symmetry element when applied on molecule it gives identical molecule.…

Q: and also comment if they are (homotopic/enantiotopic/diastereotopic) Tollowing (a) Assign the…

A: The answer is as follows:

Q: A solution is prepared by dissolving 678 mg of testosterone in 20 mL of ethanol. The sample was…

A:

Q: Calculate the coupling constant of (d-e)

A: A H-NMR spectrum whose coupling constant is to be determined.

Q: (b) What are cross-peaks? characteristics of cross-peaks of COSY and NOESY.

A: a cross-peak occurs when there is a correlation between the signals of the spectrum along each of…

Q: Bartleem is a chiral molecule. At 70 oC Bartleem is a liquid with a density of 0.722 g/mL.  At this…

A: The formula for the optical rotation is, => [α ]TD = [α]observedc * l where [α ]TD = specific…

Q: Why is it reasonable that the Ksp of NiCl2 should be so high? given: NiCl2~~>Ni2+(aq)+2Cl-(aq)…

A: Given : Balanced equilibrium reaction.  To find : why Ksp value is so higher. Solution : As we know,…

Q: Prepare a representation flowchart for trans- N2F2, which has C2h symmetry.

A: N2F2 is the chemical formula of Dinitrogen difluoride. It exists as gas state at room temperature…

Q: Calculate the observed rotation for a solution of a substance (2.0 g/mL) that is 80% optically pure.…

A: To calculate the observed rotation for a solution

Q: What groups and the symmetry elements

A: 1. C2V Point group : Symmetry elements : C2v group as it has the symmetry elements E, C2, and two…

Q: X: reproduce the interatomic interactions Y: define a computable energy (such as Gibb's free energy)…

A: The complete structure of a protein can be divided into 4 based on the complexity: primary,…

Q: Why is there a need to specify regioselectivity and stereospecificity when dealing with products…

A:

Q: The coordinates of the atoms of an ethanoic acid dimer are set out in more detail as shown. Consider…

A: Ethanoic acid contains -OH group. This alcoholic group makes hydrogen bonding with the another…

Q: What is the symmetry element corresponding to (a) Cn, (b) s, (c) i, (d) Sn?

A:

Q: Determine the symmetry of the IR active modes for cyclohexane chair conformation

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Q: Does the exclusion rule apply to C2H4?

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

Q: What is the proper proper image that should be seen through the eyepiece of the plarimeter when…

A: The proper image that should be seen through the eyepiece of the polarimeter when measuring the…

Q: Specify the absolute configuration (R or S) for:  Prozac, Paxil.

A: The precise arrangement of substituents at a stereogenic center is known as the absolute…

Q: How can you use Woodward-Fischer rules to calculate Cortisol wavelength (λmax)?

A: Woodward-Fischer rules The base values can be assigned to conjugated dienes, homo annular…

Q: Fibonacci

A: Question 1: Romanesco Broccoli, Honeycomb, Sunflowers, Nautilus Shell, Animals, Spider Webs, Crop…

Q: Attach a schematic diagram showing the procedure involved in the determination of observed rotation…

A: Rotation or optical rotationIt is the rotation of the plane polarized light about the optical axis…

Q: Draw a qualitative M.O. diagram of PH3 based off of symmetry.

A: The given compound PH3 is divided into two units as P and 3H atoms.The correlation diagram between…

Q: 1. Assign the corresponding symmetry point group for each of the following molecules. a) H F b) F c)…

A: Every molecule has symmetry elements. Symmetry point group can be derived from these symmetry…

Q: salicylic acid point groups and symmetry detailed explanation

A: The point group of salicylic acid is

Q: 1 Can one distinguish between the Markovnikov and anti-Markovnikov complement products I and II by…

A: Product ll is more substituted alkoxide hence it is the Markonikov product. And product l is anti…

Q: The statement has been made that the more extensively conjugated a chromophore, the less energy a…

A: A chromophore is part of chemical species which is responsible for colour of that particular…

Q: What can you conclude about the symmetry of the C3H5+ ion as it actually exists, as regards the bond…

A: We will discuss  about the symmetry of the C3H5+ ion as it actually exists, as regards the bond…

Q: Define the following terms a) Elements Of Symmetry b) Achiral Molecule c) Polychromatic Light d)…

A: Group theory can be defined as the branch of chemistry that deals with study of symmetry of a…

Q: Give an explanation of the semi-empirical mass formula and its symmetry term

A: The answer is given below

Q: How can I explain "why you obtain more XRD peaks when the symmetry is converted to lower symmetry.…

A: X-ray Crystallography is a technique to determine the structure of molecule or atom of a crystal in…

Q: possesses an inversion center (center of symmetry)?

A:

Q: 1. Assign the corresponding symmetry point group for each of the fol a) H F b) c) Br ÇI .B CI Br cì…

A: Symmetry Point group is derived from the symmetry elements present in that compound.

Q: Write reasonable mechanisms for each of the following transformations and label any…

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Q: comment if they (homotopic/enantiotopic/diastereotopic) (a) Assign the topicity for the following…

A: Enantiotopic protons :- If replacement of one proton by other group or atom give one isomer and…

Q: Why do polar solvents obliterate the fine spectral structures in an absorption band?

A: Polar solvents obliterate the fine spectral structures in an absorption band.

Q: Under C4v symmetry, which irreducible representations, if any, correspond to an IR active vibration…

A: For a molecule to be vibrational active, check the irreducible representations corresponding to x, y…

Q: List the point symmetry elements for the cubic (43m). The photos included show geometry. The…

A: Reflection is said to be present in the molecule if molecule present an indistinguishable image on…

Q: Symmetry, Atomic and Molecular Spectroscopy, 11) Identify symmetry elements for 1,1-dichloroethene…

A: 1,1 dichloroethene:The point group is C2v.The symmetry elements present in the molecule are E, C2,…

Q: Please help with detailed explanation: Discuss the significance of the scattering vector g for…

A: Significance:- Scattering techniques represent non-invasive experimental approaches and powerful…

Q: What are symmetry elements? What is their significance

A: The word symmetry refers to a structure in which the components, as well as the entire structure,…

Q: Dimensional structure: CH3COOH CH3CH2CHO CH3NH2 CH3CH2OCH3 CH3COCH3 CH3CH2NH3+ CH3CONH2…

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Q: Define the following:(i) Schottky defect (ii) Frenkel defects (iii) F-centre

A: The answer for part (i) is given below. Kindly repost the other parts as separate one.

Q: Which experimental technique operates on the fastest timescale: a. stopped flow techniques b. NMR…

A: Since you have posted a question with multiple questions, we will solve first question for you. To…

Q: define the ground term for the configuration d8 (Oh symmetry). Please provide solution.

A: The spectroscopic notation for an element is given by: 2S+1LJ S is the total spin, L is the total…

Q: True or False: The spin-spin (transverse) relaxation time is the time required for the nuclear…

A: The given statement is The spin-spin (transverse) relaxation time is the time required for the…

Q: Tiags to resolve the QC problem.

A:

Photochemistry

Photochemistry is the part of chemistry that studies the various mechanisms of reactions that are triggered by the presence of light energy. It also helps to study the changes involved in a molecule that can undergo the absorption of radiation.