Hexahelicene seems a poor candidate for optical activity because all its carbon atomsare sp2hybrids and presumably flat. Nevertheless, hexahelicene has been synthesized and separated into enantiomers. Its optical rotation is enormous: [a]D = 3700°.Explain why hexahelicene is optically active, and speculate as to why the rotation isso large

Q: H₂N O atom 1 CH3 atom 2 02 isoxazole ring Assuming the heterocyclic ring above to be planar: Give…

A: For the given structure, we have to calculate the number of electrons contributed to the pi system…

Q: Which of the following compounds has a plane of symmetry? &ª & I OI and II OII and III O II, III and…

A: Plane of symmetry means a plane is passing through the center of molecules.

Q: OH CH3 Но CH3 H. H Vs ОН -H- HO. vs НО H- HO- H `CH3 CH3 CH3 Et

A: Isomers: are defined as molecules having same molecular formula and same number of atoms but…

Q: 1) Mark the chiral centers in the following molecules, if any, with an asterisk (*). (b) (a) НО НО…

A: A chiral center is a center in which an atom is bonded with four different atoms or groups. So that…

Q: Eleostearic acid is an unsaturated fatty acid obtained from the seeds of the tung oii tree…

A: The structure of eleostearic acid is given as, There are two isomers of eleostearic acid. They are…

Q: Chondrocole A is a marine natural product isolated from red seaweed that grows in regions of heavy…

A: The structure of chondrocole A is shown below.

Q: Draw a structural formula of the SS configuration of the compound shown below. S CH3 CH2CH3 ÓH

A: Interpretation: A structural formula of the SS configuration of the given compound is to be drawn.…

Q: Find and determine the R or S configura- tion for all chiral carbons in Geldanamycin, an antibiotic.…

A: The chiral center configuration is determined by Chan-Ingold prelog rule.

Q: Many naturally occurring substances contain several carbon–carbon double bonds: some isolated, some…

A: Many naturally occurring substances contain several carbon-carbon double bonds: some isolated, some…

Q: How many degrees of unsaturation does each of the following drugs contain? a.zolpidem (sleep aid…

A: The degree of unsaturation is calculated as shown below where nc, nN, nH, nX are the number of atoms…

Q: 1.Draw both cis- and trans-1,4-dimethylcyclohexane in their conformations. (a) How many…

A: Presence of chiral centers (stereogenic center) in molecules can help us in prediction of type of…

Q: Draw the lowest molecular weight chiral compound that contains only C, H, and O and fits each…

A: Draw the lowest molecular weight chiral compound that contains only C, H, and O and fits each…

Q: Determine the configuration of each stereogenic center in the compound below. Highlight the carbon…

A: Given is organic compound.Stereogenic center is carbon that has four different groups attached.

Q: Consider 1-bromopropane, CH3CH2CH2Br. (a) Draw Newman projections for the conformations in which…

A: Newman projection: These are one of the ways to explain stereochemistry of alkanes. The…

Q: Determine the configuration of each stereogenic center in the compound below. Highlight the carbon…

A: Given is organic compound.Stereogenic center is carbon that has four different groups attached.

Q: Draw each compound in its most stable conformation(s). Then draw it in its most symmetric…

A: In order to solve this question, we must have an idea about whether the staggered or eclipsed form…

Q: Identify the relationship between the following two compounds. squadg NH₂ H₂N A) identical B)…

A:

Q: Are the hydroxyl groups on rings A, B, and C axial or equatorial to their respective rings?

A: The hydroxyl group present on Ring A in Cholic acid is at equatorial position.

Q: Is cis-1,2-dibromocyclohexane a meso compound?  In its planar structure, it has a line of symmetry…

A:

Q: is diketone cyclohexadiene antiaromatic or nonaromatic?

A: The question is asking whether diketone cyclohexadiene is antiaromatic or nonaromatic. To answer…

Q: How many stereogenic centers are present in the following compound? CH3CH₂CH₂CH2, H C=C H 1 02 H ||

A:

Q: Draw cyclohexanol in its chair conformation with the functional group in both its axial and…

A: The conformational isomers are formed by the rotation of a carbon-carbon single bond in a…

Q: 1. Which of the following is a chiral molecule? Encircle the substituents that make it chiral. H…

A: A. This is substituted allene. But in one side two H are present. That's why it is achiral.  B. It…

Q: 9. Which compound reacts with both NaBH and H/Pt to produce the same product? 4 2

A: Given is organic reaction .The given reaction is reduction reaction.Note: According to Bartleby…

Q: The cis ketone A is isomerized to a trans ketone B with aqueous NaOH. Asimilar isomerization does…

A: (a) Tautomers are isomers which differs only in the position of the protons and electrons of the…

Q: Draw a three-dimensional structure of a chiral compound with the molecular formula of C4H4Cl2 that…

A: Here the main thing is to see that the compound is the chiral compound but that doesen't have the…

Q: Classify the following compounds as chiral, achiral (but not meso), or meso. 1st structure: 2nd…

A:

Q: Pseudophedrine is a naturally occurring biologically active molecule with two stereogenic centers,…

A: The RS nomenclature is an important nomenclature system for denoting the configuration of the chiral…

Q: How many degrees of unsaturation does in the following drugs contain? mefloquine (antimalarial…

A:

Q: Q1] When the red compound is heated with acetic acid in formaline a new compound "D" is formed. What…

A: Given reaction:

Q: PGF 2a is a prostaglandin, a group of compounds that are responsible for inflammation (Section…

A: Stereogenic or chiral centre is the carbon atom attached to four different groups.

Q: 11 In the six following sets, which pairs of structural for- mulas represent constitutional isomers?…

A:

Q: 5) Use compounds X, Y and Z (shown below) to answer the following questions. H. CH3 H3C CH3 HO,…

A: Generally we should know that cis and trans used in prescence of double bond.  R/s term used in…

Q: 2) Determine the IHD of each molecule: a) C6H1205C12 b) C4H1ÓN6B14

A:

Q: 1,2-ethanediol

A:

Q: Classify the following pair of compounds as the same compound, enantiomers, diastereomers,…

A: Enantiomer :- The isomers of a compound which are non super imposible mirror image to each other are…

Q: How many degrees of unsaturation does each of the following drugs contain? a. zolpidem (sleep aid…

A: Degree of unsaturation helps in the determination of molecular formula and the structures from it.…

Mass Spectrometry

This process is an instrumental method in which a sample is changed to fast moving positive ions by electron bombardment. The charged particles vary due to their different mass to charge ratio and are estimated with the help of this difference. It is also called mass spectroscopy.