A. Which of the following Newman projections would represent the least stable conformer of 2,2,3....
6. Draw the two chair conformations for cis-1-sec-butyl-2-ethylcyclohexane. Predict the most stable conformer and draw the corresponding Newman projection (4 pts) 7. Convert the following compounds from their 3D structure to their Fisher projection and vice-versa (4 pts) НО Br HO co₂me HN CI CO2Me НО -СІ НЕОН СН2ОН 5| Page 8. The specific rotation for (R)-methyl 2-chloro-2,3-dihydroxypropanoate is -126.7. A student prepare a sample of methyl 2-chloro-2,3-dihydroxypropanoate enantiomers that shows a specific rotation of +89.6, (a) Calculate the percent...
Click on all of the following Newman projections that represent the least stable conformation of 2,2,3-trimethylbutane. HycCH, снэ CH3 CH3 нсн, нен, нсонн,скрсн, но CH3 CH3 ТЯ, СХСн, насан, H₂C CHS
30. Which of the choices below is the enantiomer of D-glucose? сно сно нон HO-EH сно на-он D-glucose Іно-Ен н -он но-Ен EH,OH сно но н-он но -н нон Сн,он но-Ен на-он но -н но-Ен н -он нон CHO но -н н-он но-Ен нон снен CHOH Сн,он 3. Which of the following structures is an a-anomer? Сн,он —о, он o ноноон нонс осн он — о оно сн, он он онон он он он он тон КСн,он y CH, OH...
H 9. For each molecule: 1) Identify all possible enantiomers and distinguish those that are enantiomers, diastereomers and meso compounds. II) Assign the absolute configuration of chiral carbons in each molecule OCH3 HO+Br HS+CN H2N-CH3 HOSH Он HO+CH3 н OCH3 Сн, ососна Br +D HOCH HC-BrHN+Br CH 8. For the following compounds, assign the absolute configuration for those with chiral carbons and identify those that are NOT enantiomers HO C-C-OHY -CCIN 13CH3 HAN CH3 CH3 осі H-CH3 H2N+CH H O+COOH...
34 Which of the following is the highest energy conformer of 2,3-dimethylbutane HCH, I M V Ho CH ) Ho Ho O Ho HC not A) 1 B) II C) III D) IV 35) - 35) Which of the following chair conformations represents trans-1,3-dimethylcyclohexane? " DIV" C) III B) II 36) Which of the following is the most stable conformation of cis-1-ethyl-3-isopropyleyclohexane? A) B) II 37) Select the most stable conformer of cis-1,3-cyclohexanediol HO dis-1,3-cyclohexanediol но Тон OH OH HO...
8. Label each as enantiomers, diasteriomers or as the same compound. For a.), also label each compound as erythro or threo. (14 Points - 2 Points Each Answer) CH CH HO H HO -H ci H H -CI a. Same CH3 Erythro or Threo Сн, Enantiomer Diasteriomer Erythro or Threo сна CH3 Br -Н H -Br + Br -H H -Br b. CHE CH3 Enantiomer Diasteriomer Same CH3 CHE Br -H H -Br H CI CI -Н CH2CH3 CH2CH3 Enantiomer...
8. Which of the following is the lowest energy conformer of 2,3-dimethylbutane? н Сн, CH I AI B) II C) III D) IV CH3 H₃C HAC J CH₂ H HC CH₂ H C HC CH HC I 9. Which of the following cycloalkanes has the least angle strain? A) Cycloheptane B) Cyclopropane C) Cyclohexane D) Cyclobutane . . " 10. Which of the following chair conformations represents trans-1,4-dimethylcyclohexane?
Arrange the following Newman projections in order of increasing stability (least stable first). H3C CH3 CH3 CH3 HC CH CYCH н кX CXн Х TH CHE сн. CH3 o B,D,A.C o D, B, A, C O A, B, D, C o C, B, D, A What is the structure of intermediate 1? BD, HC THA CHA CHA Product Nou H2O, NaOH |
4. Draw the most stable and most unstable Newman Projection for the following molecules using the rotation around the C3-C4 bond (use the IUPAC rules to number the chain) 5. Draw the two chair conformations for each of the following cyclohexane derivatives and then choose the conformation that is the most stable. Br BA 3 3 3 $ 2879 So ya 6. For the following compounds, identify the chiral carbons with an asterisk (*) and for those that are not...
Which Newman projection corresponds to point A on the graph of potential energy vs rotation about the C2 Cz bond? Potential Energy s A 0 60 300 360 120 180 240 Degrees of Rotation CH; HI H H H CH; CIL HCH: нен H HH H CH CH H CH CIL 11 11 11 What is the major product of the following reaction? Br NaOMe, MeOH D Δ Ome A B C D 'D D H D B с D...