below. Circle the chiral atoms (3 pts) на н н я сн, HENCH o " CO,...
Name: 10) The structure for benzyl penicillin is shown below. Circle the chiral atoms. (pts) HHH NSCH 0 . CH, H COH 11) Assign R or S configurations to the following structures. (3 pts) OH OH Br н C...NH H-CC СОН CO₂H 2.2015 punez Duan BE
(10 points) 6. Circle all of the compounds below that are achiral OH сн, н Cl. OH на C H CI H CI CH снсн, CI H сHсH, Br (10 points) 7. Assign the absolute configuration of the stereooenters in each of the following compounds. NHg CH CHy-CH снон сн, COH H но снсH,B CHs Br HO CHCH Br CHy- он H- снсH
11. Indicate the order of stability CH н сн. Br CH сH, На н н. Br H H н н" Br н H н н н' Br н A В C D 12. Which of the following structures does NOT have tetrahedral geometry around any of its central central atoms. Use resonance to help explain A. В. с. D. = NH2 13. Is it theoretically possible to separate the pair of compounds below by distillation? Explain briefly CH CHs Br...
C=O 2. Which of the following is an example of an aldopentose? Circle your answer. СН,ОН CH,он CH н-с-он H-6-H H-C-OH HO-C-H. H-C-H H-C-OH H-C-OH H-6-H H-C-OH CH,OH CH,OH CH OH 3. In the L- isomer of a Fischer projection of a monosaccharide, the -OH group furthest from the carbonyl is written. Circle your answer. on the left of the top chiral carbon. on the left of the middle chiral carbon. on the left of the bottom chiral carbon. on...
Examine the following molecules, and circle any that are chiral. Then, draw a box around any meso compounds. 4. CH3 он H2N H3 Br CH он CI он H O NH 5. Assign the absolute configuration (Ror S) to each stereogenic center in the following chiral molecules using the Cahn-Ingold-Prelog priority rules
ow Cinele the chiral atomis. pes) du n for b 10) The structure for her ude cicillin is shown HH SCH CH "сон II) Assign Ror Sconfigurations to the following structures. (3 pts) ОН он H NH, H-CECI H-C.COH сон NH,
2) Order the following alkenes from most stable to least stable Нас Нас с-сн, н,с Hас +C- Нас н CHs -CH3 H Hе most stable least stable (a) I (b) I (c) I ll (d) 7) Order the following C-H bonds from strongest to weakest. strongest weakest (a) (b) (c) II (d) 8) Which of the following is represents the lowest energy transition state for the addition of BH, to 2-methyl-1-propene? quCH «сHs нСи Нас (b) (a) Нив--н H H...
Assign the hydrogen atoms Ha - Hd to the chemical shifts in the spectrum below. С,Н,S 300 MHz H NMR in CDCI3 Source: Aldrich Spectra Collection/Reich g нн s- a d 3.00 нн b 2.04 2.05 0.96 2.8 2.6 2.4 2.2 2.0 1.8 1.6 1.4 1.2 1.0 ppm На [Choose] 2.51 ppm 0.85 ppm 1.33 ppm НЬ 1.64 ppm Нс Choose Hd Choose] I-
1. Select the best reagent(s) from the list below to accomplish the following transformations. In some cases, more than one reagent may be required. 3. HSO3(aq) A.HCI B. Br? C. Hg(OAc)/H20 D. BH3 E. H30*/Hz0 E. Hz02 G. Os04 H. Brz/Hz0 NaBH4 J. H2O, in aq NaOH Reagent(s)? NaHSO3 Product CH3 Starting Material сн. Н.c = — сна BR — Br Br CH₂ На сна нс сна HC нас нас н сну нас НАС СНА оfo/Acal НО н а )...
3. (4 pts) Complete the Fischer projection drawn below by adding the four substituents to the chiral carbon of (s)-2-methyl-3-bromo-hexane. 4. (4 pts) Draw a wedge and dash structure representing (1R 2R,3S)-1,2- dichloro3-ethylcyclohexane. 5. (4pts) 2-bromobutane is shown below. Is this (R)-2-bromobutane or (S)-2 bromobutane? 6. (6 pts) For each chiral carbon in ascorbic acid (vitamin C), shown below, assign Ror S to each stereocenter. How many stereoisomers of ascorbic acid are possible? OH HO ОН 7. (9 pts) (Are...