This study source was downloaded by 100000859819779 from CourseHero.com on 02-04-2023 12:25:59 GMT -06:00https://www.coursehero.com/file/178510944/Exam-2d-KEY2pdf/ CHE 231.B Organic Chemistry I Exam 2D Name KEY Dr. Songwen Xie October 22, 2021 ID: m I. (16 points). Nomenclature. Recitation section: R 1. Write the correct IUPAC names for the following compounds, including stereochemistry. 2. Draw the structures for the following compounds, including stereochemistry. (S)-4-bromo-1-ethylcyclopentene (Z)-2,3-dimethyl-3-octene I. (24 points). Conformation. 1. For the structure shown below, draw the Newman projection of the most stable conformation sighting down the C2-C3 bond. Do the same thing sighting down the C3-C4 bond. For the purpose of this problem, the relative sizes of the various groups are propyl > ethyl > methyl > Cl. 2. Draw the most stable conformation of the following substituted cyclohexane. sec-butylcyclohexaneThis study source was downloaded by 100000859819779 from CourseHero.com on 02-04-2023 12:25:59 GMT -06:00https://www.coursehero.com/file/178510944/Exam-2d-KEY2pdf/Powered by TCPDF (www.tcpdf.org)3. Draw the most stable conformation of each of the following substituted cyclohexanes in the boxes below. For the purpose of this problem, the relative sizes of the various groups are C2H5 > Br > CH3 > Cl. cis-1-chloro-4-ethylcyclohexane trans-1-bromo-3-methylcyclohexane trans-1-bromo-2-ethylcyclohexane II. (9 points) Each of the biologically active molecules shown below may contain one chiral carbon.