Decide if each of the following molecules is chiral or achiral. CH3 CH3COCH CH3 OH CH CHCCH3 CH3 CH3 SH CH2CH2CHCH3 CH3 CH3 CHCHÍCH CHO CH3-CH-CH2-CH-CH3 > >
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- (a) Identify type of molecules either chiral, achiral, or meso for each compound shown below and (b) Indicate the number of chiral centers in each molecule.Determine the # of chiral centers. Determine the most stable chair conformation then indicate which are equatorial and which are axial.[Review Topics) References] M Identify the absolute configuration of the chirality centers in each of the following compounds as R or S. Note: if multiple chirality centers are present, indicate the stereochemical designations as: RR, SS, RS, or SR (Other terms used for chirality center include chiral center, stereocenter, and stereogenic center.) M MD M CH3 req N. req NH2 req HO2C НО-С 9 more group attempts remaining Retry Entire Group Submit Answer Nes Previous Save and Exit 7:01 PM ) E 10/30/2019
- 5. Consider the following pairs of structures. Identify the relationship between them (enantiomers, diastereomers, or identical compounds. H3C OH H₂C HOITY H CH₂OH HO HO C,, CO₂H вой HOH2C CH₂ OH H OH H OH Н HO H H COzH Br Д H3C Br H₂CH₂C CI H CHO CH3 I CH3 OH HO Н HO... HO C OHC Н H3C, Bell!! H CO₂H Н.С CH₂OH H OH H OH HO H CH₂ CO₂H HỌ,H CH₂CH3 CH3 CI CH₂OH BrWhich molecule would have their 2 chair conformations be of equal energies?Compare the two possible chair conformations of this molecule. Given the AG for the two possible chair conformations, calculate the equilibrium constant for the interconversion between the two chair conformers at room temperature. CI H3C AG = 1.3 kcal/mol %3D AG = -RT In K %3D rearranges to K = e-AG/RT %3D R = 1.987 x 10-3 kcal/molK ||
- Mark all chiral carbons with a star in the following molecules.Find and determine the R or S configura- tion for all chiral carbons in Geldanamycin, an antibiotic. You must be clear on which carbon atoms you are assigning the con- figurations to; draw arrows to the chiral carbon if you have to. Hint: There are six chiral carbons in this molecule. Calculate the total number of stereoisomers for Gel- danamycin. The formula for doing so is 2", where n is the number of stereocenters. CH 30. H3C CH3O OH NH CH3 CH 30 CH3 NH₂CH₂CH₂CCH₂CH₂CH, H₂O Br₂ tert-BUO CH₂CH₂CH₂CH₂Br CHỊCH C—CH CHỊCH; CH₂CH₂CH₂CH.Br CH₂CH3 tert-BuO CH₂CH₂CH=CH₂ H₂O NaNH, CH3CH₂Br -CH₂CH₂CHCH₂ CH;CH C=CCHỊCH, Br excess H₂SO4 Re H₂SO4 CH;CH,C=CH CHỊCH C=C
- The molecule (I) and (II) are || CH3 **H I Identical Enantiomers Diastereomers Constitutional Isomers Next H3C X II2. Draw the optical isomers of CH3-CHOH-CHOH-CH3 . INDICATE the absolute configuration of each chiral center. Which are enantiomers? Which are diastereomers? Is there any meso compound present? Identify if yes.How do you assign the chiral compounds for this chair conformation?