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- The quantitative differences in biological activity between the two enantiomers of a compound are sometimes quite large. For example, the D isomer of the drug isoproterenol, used to treat mild asthma, is 50 to 80times more effective as a bronchodilator than the L isomer. Identify the chiral center in isoproterenol. Why do the two enantiomers have such radically different bioactivity?Consider CH3-CH(OH)-CH(OH)(Br). Determine the absolute configuration of each chiral center in one pair of diastereomerHow many carbon chirality centers does the molecule possess?
- What is the relationship between these structures and why? these are diastereomers because all chiral centers are opposite these are diastereomers because some, but not all of the chiral centers are opposite these are enantiomers because all chiral centers are opposite these are enantiomers because some, but not all of the chiral centers are oppositeDiastereomers are a type of a stereoisomer. Diastereomerism occurs when two or more stereoisomers of a compound have different configurations at one or more (but not all) of the equivalent (related) stereocenters and are not mirror images of each other. OH OH НО Но ÕH ОН How many chiral centers are present in one of the structures above? 1 O 2 O0 Are the structures mirror images of each other (i.e., are ALL of the chiral centers exactly opposite)? no yes I can not tell. How are these two structures related to each other? Diastereomers Non-isomeric (different molecular formulas) O Constitutional (same MF but different connections) Enantiomers (non-superimposable mirror images)Draw the optical isomers of CH3-CHOH-CHOH-CH3. Indicate the absolute configuration of each chiralcenter. From the drawn isomers, determine which are enantiomers and which are diastereomers, and identify if there are meso compounds. Please draw first the optical isomers before detemining.
- 7 For the following compound with two chiral centers assign 'R' and 'S' configurations. Draw enantiomers and diastereomers for the following compound? How many enantiomers and diastereomers are possible. Assign (R) and (S) configurations for all the structures. What are diastereomers? COOH H CI € Br -H CH3How many chirality centers does this molecule have?Draw a 3-D structure of a molecule with a molecular formula of C4H9Cl containing one chiral center and draw its mirror image.
- Use models (or drawings) to determine which of the following compounds are stable chiral molecules at room temperature. For those that are chiral, draw three-dimensional ( perspective) diagrams of the enantiomeric forms. H OMe OMe Bu Bu (HO2C)HC=C=CH(CO2H) HO₂C NH₂ CO₂H NH₂ (HO2C)HC=C=C=CH(CO2H)Draw all possible stereoisomers for the following molecule. Indicate which are enantiomers and which are diastereomers and assign absolute chirality at all centers and for all structures. H2NIdentify each molecule as Chiral or Achiral and write the number of Asymmetric carbons present in each chiral molecules. Give explanation.