A chiral center is a(n) (select all possible answers) atom bearing groups such that interchanging of any two groups leads to a stereoisomer. non‑superimposable mirror image. tetrahedral atom bonded to 4 different substituents. plane of symmetry so that there are no stereoisomers. enantiomer. tetrahedral atom
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A: The solution is as follows:
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A: 1. Chiral 2. optically active 3. enantiomer
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Q: Is this a chiral center? If so, R or S?
A: A carbon atom attached with four different group is called chiral centre.
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Q: which numbers are the chiral centers pls explain why
A: chiral= carbon number ( 2,3 & 5 ) achiral= carbon number 1, 4 & 6.
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A: The answer is as follows:
Q: OH OH Br CH;- CH-CH,CH3 CHH— CH — СООН CICH— CH — СH,
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Q: CH3 c) H- Br OH d) e) CI
A: Stereochemistry of organic compounds.
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A: Structure is given Chiral Centers = ?
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A: Dear student I have given answer to your question in the image format.
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A chiral center is a(n) (select all possible answers)
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- Draw a formula for the lowest molecular weight compound that contains C, H, and possibly O, N or 5, is a chiral compound, contains ONLY one functional group, and is a sulfide. 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. Alkene or alkyne groups are considered to be functional groups. 98 4 - /IP ChemDoodlechiral. If you were able to make another molecule that is a mirror image of the chiral molecule, the mirror image and the original molecule will be non-superimposable. i.e. the atoms surrounding carbon won't completely align. The lack of alignment of the suround atom makes the two molecules different from each other. The central carbon must be surrounded by 4 different groups. The chiral carbon is highlighted. CH;CH) CHICH2 CH3-C-CH2-CHy OH CH) miror The 3D structure of the above molecule focuses on the chiral carbon and the bond surrounding the chiral carbon. The molecule on the left is different from the molecule on the right (mirror image) because they are non-superimposable. H. CH3-C-COOH HOOC COOH CH NH2 NH2 mimor Answer the following questions: 1. Draw five structural isomers for hexane, CHe. Isomer 3 Isomer 2 Isomer 1 Isomer 5 Isomer 4 2. Draw three structural isomers as possible for CHO.1. Tell whether the following pairs of structures are identical or not. 2. For those pairs that are not identical, explain what types of isomers they are. 3. If there are chiral centers, denote them with the correct R,S.
- 15. Naming Stereoisomers with Two Chiral Carbons Using the RS System The (RR) isomer of methyphenidate (Ritalin) is used to treat attention deficit hyperactivity disorder (ADHD). The (S.S) isomer is an antidepressant. Identify the two chiral carbons in the structure below. Is this the (R.R) or the (S.S) isomer? Draw the other isomer. HN- H. ..Construct a model in which a tetrahedral carbon atom has four different colored model atoms attached to it- red, green, orange and white representing 4 different atoms attached to the central atom. a) Does the atom have a plane of symmetry? why or why not? b) Now replace the green atom in your model with a second orange atom. Now two of the groups attached to the carbon atom are identical. Does the model now have a plane of symmetry? Describe it. c)A carbon atom has four different groups attached to the stereogenic center. Draw structural formulas for the following compound and mark stereogenic centers with as asterisk: 1-bromobutane, 2-bromobutane, 1,2-dibromobutane, 1,4-dibromobutane, 2,3-dibromobutane.5. Construct models of all the stereoisomers of 1-bromopropene. Draw the line structure of your models. Are these molecules isomers? If they are isomers to what specific category do they belong? Assign E or Z descriptors to each compound, if appropriate. 6. Construct a model of dibromochloromethane and draw the perspective structure. How many planes of symmetry does this molecule possess? Construct the mirror image of your model. Are the two models superimposable? Classify or describe the relationship between these two mirror images, and assign R or S descriptors, if appropriate.
- 2. Draw the optical isomers of CH3-CHOH-CHOH-CH3 . INDICATE the absolute configuration of each chiral center. Which are enantiomers? Which are diastereomers? Is there any meso compound present? Identify if yes.Refer to the following molecule: CH,CH, Br H. H,C NO2 How many achiral carbons are there? Select ] The molecule is chiral. [ Select] What is the configuration on C2? [Select ] Does the molecule have a meso isomer? [ Select ] How many stereoisomers does the molecule have (including the one already shown)? [ Select ] How many diastereomer pairs does the molecule have? [Select] If the -NO2 and -Br switched places, the new compound will be [Select] with the original compound. What is the third priority substituent on carbon 2? Select]For the molecule below, 1. Indicate whether or not it has a stereoisomer (type yes or no in Blank #1). 2. If your answer to 1. is yes, identify the type of stereoisomer in Blank #2 (choose from enantiomer or geometric - watch your spelling!). If your answer to 1. is no, type none in Blank #2. H3C OH OH II -CH₂CH3
- .. O 2. Give the molecula formula for the following compounds and star the chiral center(s) in each one of them if there is any. HO NO2 HS N' HOOJ HN Но H. CH3 followingnotegu F. HOO) HO, CH3 HOO). N. ఆరింది 3. Define chiral and an achiral molecules. 4. Define structural (or constitutional isomers). Draw as many constitutional isomers as possible with a molecular formula of C6H14 5. Define stereoisomers and give an example of two stereoisomers (draw them in line-angle notation). 6. Define diastereomers and give an example of two diastereomers (draw them in line-angle notation). 7. Define enantiomers and give an example of two enantiomers (draw them in line-angle notation).F) Circle the letter corresponding to the relationship of each pair of structures: Identical (I), Conformers (C), Enantiomers (E) (enantiomers can have different conformations). FIRST... determine the absolute configuration of chiral centers. H. ІН' I H | H с H Me E MeConsider the pair of compounds shown below then select the word or phrase that best describes the relationship between them... Et Et Me Et Et Me and Me H. H Me H They are identical. None of these are accurate. They are diastereoisomers. They are constitutional isomers. They are enantiomers.