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- (a) Draw the nine isomers having the formula C7H16 . (Hint: There is one structure with a seven-carbon chain, two structures with six-carbon chains [one is illustrated in the margin above], five structures with a five-carbon chain, and one structure with a fourcarbon chain.)(b) Identify the isomers of C7H16 that are chiral.Explain briefly and clearly the following concepts, taking as reference the molecule of n-butane and the corresponding drawings or illustrations. See pages 149-152 of the book Organic Chemistry, sixth edition (J. G. Smith). 4. What is steric hindrance in a conformation? Then draw a picture to illustrate the concept? 5. What is the torsional stress of a conformation? Then draw a picture to illustrate the concept? 6. Describe 1,3-diaxial interaction and illustrate with a specific example.Most naturally occurring amino acids have chiral centers (the asymmetric a carbon atoms)that are named (S) by the Cahn–Ingold–Prelog convention (Section 5-3). The commonnaturally occurring form of cysteine has a chiral center that is named (R), however.(a) What is the relationship between (R)-cysteine and (S)-alanine? Do they have the oppositethree-dimensional configuration (as the names might suggest) or the same configuration?(b) (S)-Alanine is an l-amino acid (Figure 24-2). Is (R)-cysteine a d-amino acid or anl-amino acid?
- Consider molecules with more than one chiral center. Consider 2,3-dyhdroxybutanoic acid. a. How many chiral centers does it have? b. Which ones? c. Reproduce the structure and encircle the four groups, which are linked to each chiral carbon.Rank these conformational isomers in order of decreasing potential energy. Rank from hightest to lowest potential energy. To rank items as equivalent, overlap them. Be sure to rank all of the structures!!!!Write the name of the following compounds. Which of them are stereoisomers? Which of them are optically active? Use cis-trans, (E)(Z) nomenclature and assign the absolute configuration (R),(S), if any to each chiral center.
- Can you give me detail about the chiral carbon step by step with an examples, please?-Sketch the Fischer projection and make a model of each stereoisomer (R and S) of the alcohol 2-butanol, CH3CHOHCH2CH3. Also sketch the monosaccharide glyceraldehyde, HOCH2CHOHCHO. Prioritize the four groups attached to the stereocenter with 1 being the highest priority and 4 being the lowest priority.Draw all the stereoisomers for structures A and B, label each structure as chiral and achiral and give the type of isometric relationship to the original compound be as specific as possible.
- Are these chiral or achiral? Is the stereo enter R(D), S(L) or neither? Please state the full name and stereocenter indicator.Pyrethrin II and pyrethrosin are two natural products isolated from plants of the chrysanthemum family. Pyrethrin II is a natural insecticide and is marketed as such. Q,) Label all chiral centers in each molecule and all carbon-carbon double bonds about which there is the possibility for cis,trans isomerism.On b), I understand that we don't know which side of the molecule the Cl would attach on, but I was under the impression that we only show stereochemistry on a chiral center, and I do not see where the chiral center is on this molecule. Would you be able to explain this?