Concept explainers
Interpretation: The two enantiomers of the amino acid leucine, HOOCCH(NH2)CH2CH(CH3)2, has to be drawn and each enantiomer must be labelled as R or S.
Concept introduction: Enantiomers are the non-superimposable mirror images of each other. Optical isomers are given R and S configuration by sequence rule that is by assigning 1 to 4 priorities to the substituents attached at the chiral center on the basis of their
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Organic Chemistry
- High serum cholesterol levels often correlate with increased risk of heart attacks. The structure of cholesterol is shown below. Identify the chiral centers. How many chiral centers are there in cholesterol?arrow_forwardIf the asymmetric carbons in a molecule have been designated (2R,3S,5R), what will the designations be in the molecule’s enantiomer? What will the designations be in one of its diastereomers?arrow_forwardGlycosaminoglycans (GAGs) are heteropolysaccharides composed of repeating disaccharide units. These units have some similar characteristics that allow them to be identified as GAGS. Which of the structures are examples of glycosaminoglycans? А. C. E. HO HO COO™ H Н ОН Н CH₂OH H H H OH OH Н CH₂OH Н OH H ОН o,so H H Н CH₂OH H H ОН H CH₂OSO H NH C=0 CH, H H Н NH c=0 CH3 H CH,OH OH Н ОН OH H B. D. Н НО H ОН H CH₂OH H ОН Н СОО ОН Н Н H H OSoz H Н OH б H CH₂OH ОН CH₂OSO H ОН H Н OSO, H Н NHSO,arrow_forward
- A well known non steroidal anti inflammation drug NSAID exists in two sterochemical forms. Only one is biologically active. Below is the structure of the biological active form. Identify the chiral center and determine if it is the R- or S- stereoisomer.arrow_forwardIdentify the chiral centers in the following molecule and label each as r and s.arrow_forward● Identify the chiral center(s) and determine its absolute configuration. H₂C-arrow_forward
- The number of chiral centers in progesterone (shown below) is C-CH3arrow_forwardChiral Atoms: Determine how many chiral centers each molecule has and indicate wnich atoms are chiral by adding an asterisk (*) next to it. Then assign the chiral atom as either (R) or (S). Br Br он "Br "CHa Br Br Br Br CH3arrow_forwardDraw the optical isomers of CH3-CHOH-CHOH-CHO. Indicate the absolute configuration of each chiral center. From the drawn isomers, determine which are enantiomers and which are diastereomersarrow_forward
- General, Organic, and Biological ChemistryChemistryISBN:9781285853918Author:H. Stephen StokerPublisher:Cengage LearningOrganic And Biological ChemistryChemistryISBN:9781305081079Author:STOKER, H. Stephen (howard Stephen)Publisher:Cengage Learning,