5.44 Indicate a plane of symmetry for each molecule that contains one. A molecule may require rotation around a carbon-carbon bond to see the plane of symmetry. с. d.
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- A is a toxin produced by the poisonous seaweed Chlorodesmis fastigiata. (a) Draw a stereoisomer of A that has all Zdouble bonds.Consider the following six compounds (A–F). How are the two compounds in each pair related? Choose from enantiomers, epimers, diastereomers but not epimers, constitutional isomers, and identical compounds.a. A and Bb. A and Cc. B and Cd. A and De. E and FAnswer the following question about compounds A–D (See in attachment) How are the compounds in each pair related? Choose fromconstitutional isomers, stereoisomers, or identical molecules: A and B; A and C; B and D.
- 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,)State the number of stereoisomers possible for each molecule.What is the percent enantiomeric excess (ee) of a mixture that has 86% of one enantiomer and 14% of the other?Why is molecule b more stable than a in chair conformation?
- Trabectedin, shown in a ball-and-stick model on the cover of this text, is an anticancer drug sold under the trade name Yondelis. a. Locate the stereogenic centers in trabectedin. b.What is the maximum number of stereoisomers possible for trabectedin? c.Draw the enantiomer. d.Draw a diastereomer. e.If the specific rotation of trabectedin is +41.5, what is the [α] of a solution that contains 75% trabectedin and 25% of its enantiomer?f . What is the ee of a solution with [α] = +10.5?Trabectedin, shown in a ball-and-stick model on the cover of this text, isan anticancer drug sold under the trade name Yondelis. Question: Locate the stereogenic centers in trabectedin ?Part B. Mark each chirality center in each molecule with an asterisk (*).