HW_5_-_2024

1. Draw all possible stereoisomers for the following molecule. Once drawn, assign the configuration at each chiral center as R or S. Give the relationship between each stereoisomer that was drawn as enantiomers, diastereomers, or meso compound. You may build a table to give the relationship between each stereoisomer. ОН NH2

Shown are two stereo representations of lactic acid. Compare the two structures shown. Determine whether they represent identical molecules or mirror images. identical COOH COOH H" OH CH3 H3C HO Determine the absolute configuration of the two structures. Left: S✔ Right: S An error has been detected in your answer. Check for typos, miscalculations etc. before submitting your answer. H

I NEED HELP WITH BOTH QUESTIOND PLEASE

I need help with this please

Hw.212

Build a model (attach a photo) for any of the following compounds. What is their relationship: (i) Identical in the same conformation, (ii) conformers, (iii) enantiomers, (iv) diastereomers, (v) constitutional (structural) isomers or none of (i) – (v)? 4 1.4 он H. LOH $Bu CI $Bu Relationship:

a. C1- C3- For each chiral carbon labeled in the structures below (see the numbers), assign R or S absolute configuration in the boxes provided - you only need to enter R or S. Then, state (in the box provided) whether the molecules are enantiomers, identical, diastereomers, or not related. 0 OH OH 2 OH X 3 and 1-44 C2- C4- OH and OH 2 Related- hp

For the following molecules, draw all possible stereoisomers using line-angle formulas with wedge/dash notation. Label the stereocenters as R or S. Indicate which ones are enantiomers and which ones are diastereomers. (Remember: there are 2 stereoisomers possible for a molecule with n chiral centers) (A) (B) (C) (1 chiral center) Br OH (2 chiral centers) CI OH CH3 (3 chiral centers)

1a. How many stereogenic centers are present 1c. Draw a three-dimensional structure of a in the structure below? Indicate them with asterisk(s). How many stereoisomers stereoisomers are possible? chiral compound with the molecular formula of C4H4Cl₂ that does not have a stereogenic carbon. In addition, draw the enantiomer of this compound. Number of stereogenic centers: Number of stereoisomers possible: 1b. Draw one of the two most stable stereoisomers of the compound in 1a using a planar structure with wedges and dashes. Now draw it in its preferred chair conformation. 1d. Draw two meso compounds with the molecular formula of C7H14.

) NH₂ For the questions below, more than one answer may be correct. Circle all of the correct answers regarding the following compounds. Br Br A Br B Br (a) Which pair of compounds are identical? (b) Which pair of compounds are enantiomers? (c) Which pair of compounds are diastereomers? (d) Which compounds are chiral? (e) Which compounds are meso? C Br Br D AB AC AD BC BD CD none AB AC AD BC BD CD none AB AC AD BC BD CD none ABCD none A B C D none 5

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OH CH3CH=CHCHCH2CH3 4-hexen-3-ol Four stereoisomers exist for 4-hexen-3-ol. Draw the structure of the isomer that has the E configuration around the double bond and the S configuration at the chiral center. Use the wedge/hash bond tools to indicate stereochemistry where it exists. You do not have to explicitly draw H atoms. ⚫ If a group is achiral, do not use wedged or hashed bonds on it.

Draw a structural formula of the S configuration of the compound shown below. • Use the wedge /hash bond tools to indicate stereochemistry where it exists. Include H atoms at chiral centers only. • Ifa group is achiral, do not use wedged or hashed bonds on it. CH3 CH3 CH;CHCHCN CH,CH,CH,CHCH,CH, CH2NH2 Draw a structural formula of the RS configuration of the compound shown below. 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. ÇI

Build a model (attach a photo) for any of the following compounds. What is their relationship: (i) Identical in the same conformation, (ii) conformers, (iii) enantiomers, (iv) diastereomers, (v) constitutional (structural) isomers or none of (i) – (v)? H OH H. HO $Bu CI $Bu Relationship:

Draw all possible stereoisomers for HC=OCHClCHClCH2Br. Label the compounds as Compound I, II, etc.. Determine the relation of each of these compounds to another (pair relations as enantiomers, diastereomer, mesocompound or no relations).

Assign (R) or (S) configuration to each chiral center in the molecules below. Then indicate if the molecules are identical, constitutional isomers, enantiomers, or diastereomers. F F ОН VS. OH

2 Identify the following pairs of compounds as identical or isomers. If they are isomers, are they constitutional isomers or stereoisomers? If they are stereoisomers, are they enantiomers or diastereomers? Clearly write the words- identical, enantiomers, diastereomers, constitutional isomers. H3C CH3 and H3C. H3C Br H.

3. For each of the following pairs of structures identify the stereochemical relationship as identical, constitutional isomers, enantiomers or diastereomers. (^- a) b) SH H₂C SH CH 3 ၀င်း H₂C CH3 H

1. How are each of the structures A-F related to structure X? They could be E (enantiomers), D (diastereomers), C (conformers), or I (identical). CH3 CH3 НО. CI- Br CH2OH CI CH3 CI CI Br HOH2C ОН HO Br 'CI HOH,C" OH Br CI HOH2Ċ CI X А. В C CI CI HO CI CI Br CH3 CI Br -CH3 H3C CH2OH ОН Br CI- ČH2OH HO "CH,OH D F E

Help! Please explain how you got the answer 

CH3 CHCH CHBrCH2 C≡C CH(OH)CH2CH3 Need to draw this 3D structure w/ chiral centers and come up with the name w/ stereochemistry

Could some one answer these  Question 1 and 2  Parts A-B-C I do not need a super detailed explanation i just need to see if did them correctly this is a practice set and is non graded

Classify the following pair of compounds as the same compound, enantiomers, diastereomers, constitutional isomers, or not isomeric. Also, select the correct IUPAC name, including the correct (R) or (S) designation, for each. H ÷ ||I The correct IUPAC names are: || J k CI same compound enantiomers diastereomers constitutional isomers not isomeric Compound I: (2R, 3R)-2,3-dichloropentane, Compound II: (2R, 3S)-2,3-dichloropentane Compound I: (2S, 3S)-2,3-dichloropentane, Compound II: (2S, 3S)-2,3-dichloropentane Compound I: (2S, 3R)-2,3-dichloropentane, Compound II: (2S, 3R)-2,3-dichloropentane Compound I: (2R, 3R)-2,3-dichloropentane, Compound II: (2R, 3R)-2,3-dichloropentane

Draw the structure of the enantiomer of Ribose.

3A. and 3F.

Same answers for the #2 sub questions

Department Final EXd Q1: Coibacin B is a natural product that exhibits potent anti-inflammatory activity and potential activity in the treatment of leishmaniasis, a disease caused by certain parasites. HAH H (a) Assign the configuration (R or S) of each chiral center in coibacin B. (b) Identify the number of possible stereoisomers for this compound, assuming that the geometry of the alkenes is fixed.

Check the box under each structure in the table that is an enantiomer of the molecule shown below. If none of them are, check the none of the above box under the table.