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- ∞ ∞ ob do a b Identify each of the above structures as either achiral, chiral, or a meso compound. Structure a: Structure b: Structure c:[ Structure d:[ achiral chiral meso dIs the following compound chiral? V он 2 OH Does this compound have a plane of symmetry? How many stereocenters do you count? VTetrodotoxin, a powerful neurotoxin that causes paralysis and respiratory failure, is isolated from marine and estuarine fishes of the family Tetraodontidae like pufferfish. How many chirality centres does tetrodotoxin have? НО HN H₂N НО- ОН ОН Tetrodotoxin |-ОН ОН
- Allenes are compounds with adjacent carbon-carbon double bonds. Many allenes are chiral, even though they don’t contain chirality centers. Mycomycin, for example, a naturally occurring antibiotic isolated from the bacterium Nocardia acidophilus, is chiral and has [α]D = -130. Explain why mycomycin is chiral.One of the following molecules (a)–(d) is d-erythrose 4-phosphate, an intermediate in the Calvin photosynthetic cycle by which plants incorporate CO2 into carbohydrates. If d-erythrose 4-phosphate has R stereochemistry at both chirality centers, which of the structures is it? Which of the remaining three structures is the enantiomer of d-erythrose 4-phosphate, and which are diastereomers?Simvastatin (trade name: ZocorTM) is a pharmaceutical used to treat elevated blood lipids (i.e. high cholesterol). It contains 7 chirality centers (which allows for 128 different stereoisomers!) Determine the configuration of each chirality center. H H HO H H H H H H H H H O H H
- Sensipar is a pharmaceutical used for the treatment of hyperparathyroidism in patients with chronic kidney disease. Draw the enantiomer of the molecule shown below. Use a dash or wedge bond to indicate stereochemistry of substituents on asymmetric centers, where applicable. ana ab Cock trol esc . Q option A T Z vel @ 2 Drawing 124,528 W S A X H command 3 E 80 F3 D $ 4 C F4 R F 5 V FD T Atoms, Bonds and Rings stv JO G 6 B Y 7 H ⁰0 A F7 U N Charges 8 J ( 9 M FO 1 T K O H F10 L Ⓒ CI Remove P Undo command i { Reset Ⓒ Done + [ ? option 1 1 }Assign R or S configurations to the chirality centers in the following molecules: 5-43 (a) H OH (b) CI H (c) H OCH3 HOCH2 CO2Hare these the same compounds, diastereomers, enantiomers, or Constitutional isomers? a n CH 3 CH 3 H CI ‡ & H CI H CH₂CH₂ CH₂ CH3 © H C CI (6 @ CH3 i‡ H H Br OH CH₂CH 3 (Hy H+ OCH 3 CH₂ CH₂ CH3 Br OH OCH 3