2. i) Circle each stereogenic unit in the Structure provided and write its label directlybelow the unit (alkene → (Z) or (E); chiral center → (R) or (S); substituted cycloalkanering lacking chiral centers → cis or trans).ii) Write C in the 1st box if the structure is Chiral (has an enantiomer) or A if it is Achiral.iii) In the 2nd box write the # of diastereomers of the structure provided.Structure (circle and label)Chiral or achiral# of DiastereomersLABELSHH

Step 1: Step 2: Step 3: Step 4:

Answered: 2. i) Circle each stereogenic unit in…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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2. i) Circle each stereogenic unit in the Structure provided and write its label directly below the unit (alkene → (Z) or (E); chiral center → (R) or (S); substituted cycloalkane ring lacking chiral centers → cis or trans). ii) Write C in the 1st box if the structure is Chiral (has an enantiomer) or A if it is Achiral. iii) In the 2nd box write the # of diastereomers of the structure provided. Structure (circle and label) OMe Chiral or achiral # of Diastereomers LABELS OH
4. - Determine the structural relationship between the compounds in each of the pairs that follow. They may be unrelated, identical (the same compound), constitutional isomers, diastereoisomers, enantiomers? - Identify the optically active (chiral) compounds and any meso compounds. - Assign a configuration (R or S) to all stereocenters. - Name all compounds so that the name reflects the structure unambiguously. a) b) c) d) e) f) H- HO- CHO H3C -NH₂ H- -H H- CH2OH H CH3 CH3 H Ph H CH3 H H CI Ph H H CI CH3 CH₂OH -OH -NH₂ CI H H CI & t OH CHO H3C H OH O-CH3 oma O-CH3 H3C OH
Draw a structural formula for trans-1-bromo-3-isopropylcyclobutane. • Show stereochemistry only if given in the name. • Include H atoms at chiral centers only. • If a group is achiral, do not use wedged or hashed bonds on it. • In cases where there is more than one answer, just draw one.
4. Isomers and Stereocenters ( (a) Assign each set of molecules as constitutional isomers, conformational isomers, enantiomers, diastereomers, or identical. Please write the full name for the type. Molecules Type (b) H₂Ca HgC.. CH3 OCH₂ CH3 af OCH, SP H₂C**** H₂C H₂C NGOCH, H.C_OCKS OCH₂ CH₂ H₁C HC H*** CI H H CI Br H3C CH₂ Br (d) E) (0) For each of the following molecules, write the number of stereocenters and circle the center of any stereocenters. (i) (ii) H₂C (онт (eg 5) (b) -CH3 Isegna CH3 on mots eno H₂C CH3
Draw a structural formula of the S configuration of the compound shown below. CH₂CI [Referer • Use the wedge/hash bond tools to indicate stereochemistry where it exists. • Include H atoms at chiral centers only. •If a group is achiral, do not use wedged or hashed bonds on it. n ? ChemDoodle
(v) Identify every chiral center in cholesterol (below) with an asterisk. HO (vi) Draw an energy vs. dihedral angle diagram that represents all the conformations of butane starting from the anti-conformation. (vii) Draw both chair conformations for the compound shown below using the templates provided. Circle the chair conformation that is lowest in energy. Br (viii) Draw a chair conformation that meets the following criteria. Axial chlorine at C5 Equatorial methyl at C4 Bromine on C2 that is cis to the chlorine 6 2 5 3 4
Solve the first or second question
(2 3 C. (a) Construct four models of the compound CH,CHCICHBRCH3. Take two models and hold them with the two CH3 groups away from you. Now arrange the CI on C-2 and the Br on C-3 so that both groups are on your right on one model and both are on your left on the other model. Test to see if these models are superimposable or are enantiomers (mirror image isomers). Draw projection formulas for these models. If they are the same, only one structure needs to be drawn. If they are enantiomers, draw both structures as mirror image isomers.
Does methylcyclopentane have a stereogenic center?
Image attached
10. Provide a structure of an isomer that has the molecular formula C5H8O2 and fits the criteria described below. Note that all of the structures must be neutral and not have any formal charges on any of the atoms. a) Contains an ester and an alkene b) A chiral compound that contains a ring, ether and ketone. c) Contains an alcohol and an alkyne. d) A meso compound that contains two alcohols.
Using a planar pentagon representation for the cyclopentane ring, draw structural formula for trans-1,2-dimethylcyclopentane. • Use the wedge/hash bond tools to indicate stereochemistry where it exists. • Include H atoms at chiral centers only. • In cases where there is more than one answer, just draw one. • Do not include lone pairs in your answer. They will not be considered in the grading. opy aste C. O O O- [* ChemDoodle I...

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