Questions 6-8 refer to compound A . Draw an enantiomer of compound A . Draw a diastereomer of compound A . The binding sites of these receptors or enzymes have specific three-dimensional shapes. The better a compound fits into this three-dimensional shape, the stronger the response from that site.
Enantiomers have mirror image structures, so they bind unequally to a given site.
One enantiomer may bind well to a certain site, whereas the other enantiomer may not bind well to this site, but instead bind well to another site. Because these enantiomers bind well to different sites means they will induce different biological responses. Briefly explain the mechanistic origin of this rule. He noted that the major or exclusive products of these reactions were those in which the hydrogen of HX became attached to the least substituted carbon of the alkene. The more stable carbocation usually occurs when the hydrogen of H-X is attached to the least substituted end of the alkene, leaving the carbocation charge on the more substituted carbon.