CHM 2120 Study Guide - Quiz Guide: Phenylalanine, Chch-Dt, Enantiomer
13 Jun 2015
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Assignment #1d - answer key: identify each of the following pairs as constitutional isomers, stereoisomers (configurational isomers), or conformers. a) b) c) Br conformers (conformational isomers: draw each structure below along with its mirror image. Indicate whether the compound is chiral or achiral: cis-1,2-dimethylcyclopentane. b) trans-1,2-dimethylcyclopentane a) Achiral - mirror images are superimposable plane of symmetry exists (meso compound) b) Chiral - mirror images are not superimposable: cis-1,3-dimethylcyclohexane d) trans-1,3-dimethylcyclohexane. No stereogenic centre, 2 identical groups on tetrasubstituted carbon. Chiral - mirror images are not superimposable: ch3cclbrh, ch3ch2chohch2ch3, (ch3)2choh, ch3ch2chohch3 g) Chiral - mirror images not superimposable h) j) Achiral - mirror images superimposable (2 identical groups on central carbon) Plane of symmetry exists: identify the chiral centres in the following molecules, fexofenadine (allegra): N: draw each of the following compounds in three dimensions. Draw the mirror image of each and determine whether the compounds are chiral.
