please label clearly Stereochemistry: Choose the chiral structures Choose the chiral structures among the on...
Choose all the achiral compounds among the ones shown (Each of your choices can be achiral in any conformation, not just the one shown) Check all that apply. OH OH CH, OH OH OH CH OH OH HyC CH3 OH OH CH H.
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5. Label the chiral carbon(s) in each of the following structures with an asterisk (*). H OHH OH H-C-C=C – H | H H OH 6. Use your knowledge of the Cahn-Ingold-Prelog sequence rules to rank the substituents in order of priority, highest priority first: HO HO The alcohol The chlorine The ethyl group The carboxylic acid group 7. Identify the following as chiral or achiral. If chiral, identify the chiral carbon(s) with an asterik...
Choose all the achiral compounds among the ones
shown.
Assign R/S configurations to each chiral center in the following molecules. Clearly label the stereocenter and show your priority ranking. If no chiral centers exist, write "achiral." (15 pts) GEHICH ANTICHE VSH он "CH, HjC NH2 OH
Which of the compounds shown below are chiral? (choose all correct) ОН o ОН E Which of the compounds shown below is/are chiral? (choose all correct answers) O For determining whether a stereogenic center is Ror S. the substituents need to be ranked. Rank the following substituents from high to low, entering a 1,2,3, or 4 next to each structure, with 1 for highest priority ranking and 4 for lowest priority ranking. 0-6 -C-H -CH_Br -CH₂OH -c-oh Which of the...
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Label each stereocenter above as R or S. List the letter associated with the structures that are chiral. List the letter associated with the structures that are achiral. List the letter associated with the structures that are meso.
5. For the structure, CHO НЕОН H+OH CH,OH (a) Draw all the stereoisomers. (b) Label structure as chiral or achiral. (c) Assign each chiral center as (R) or (S). (d) Give the relationships between the stereoisomers (enantiome (e) Label any meso compounds. 6. Give the structures of the following compounds. Classify the com primary, secondary, or tertiary halide if possible. (a) Sec-butyl chloride (b) Isobutyl bromide (c) Chloroform (d) Tert-pentyl iodide (c) 2,2,2-trichloroethanol (f) Methylene chloride
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Stereochemistry 5. Using dashes and wedges, Draw all the structures for the following molecules. F₃C нсусн, Он (Indicate the steochemistry) b. 6. a. Circle the stereochemistry in the following compound. Он о HO ТОН 0 OH b. What is maximum number of stereoisomers in the above compounds. Label each as diastereomer and enantiomer) c. Label each stereochemistry with Ror S configuration?
9. C (Z-2-hexene d. They are all of equal stability. Choose the most stable alkene among the following a 1-hexene b. (E)-2-hexene 10. What is the relation between an enantiomer's configuration and its specific rotation? (a) Rcompounds usually are dextrorotatory with few exceptions (b) R compounds always are dextrorotatory. (c) There is no relation. (d) R compounds always are levorotatory 11. How many chiral centers are there in tartaric acid, and how many different stereoisomers exist for this acid? он...
38. Provide the correct hexagonal conformation or Ring-flipped chair conformations for the following cyclohexane (as parent chain) compounds. Then circle the more stable chair conformation. Flat Hexagon structure Chair conformation A H Chair conformation B CHS 2 Dr 2 Br 3 CH3 2 5 3 39. The following compounds have 2 stereogenic carbons, therefore 4 stereoisomeric structures (3 if there is a meso-form) These are not cyclic compounds. a) Draw the structure. b) Identify the stereogenic carbons. Assign the Cahn-Ingold-Prelog...