How many total stereoisomers can be drawn from the following molecules? If there are many, you can write out the mathematical formula to solve for it without solving.PrEtAStructure A would haveStructure B would haveCCH,CH,CHOHCHCH,CH,CH,Bstereoisomers.stereoisomers.Structure C would havestereoisomers.

To determine the number of stereoisomers for each molecule, we need to identify the number of…

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Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

Chapter6: Alkanes & Alkenes

Section: Chapter Questions

Problem 21E

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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.
2. The number of possible stereoisomers can be determined by the equation 2" where n = number of asymmetric centers. For the following molecule, what is the possible number of stereoisomers? Draw out all possible stereoisomers. Are there structures that are identical to each other? CH3 но
Stereoisomers are isomers that differ in spatial arrangement of atoms, rather than connectivity of atoms. Stereoisomers have different properties, especially in biological systems. Which is the stereochemical relationship between this pair of molecules? OH "OH 8p OH OH ...||| 4 A) enantiomers B) diastereomers C) identical compounds D) constitutional isomers E) Not isomers
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Shown below is Streptomycin, an antibiotic medication used to treat a number of bacterial infections, including tuberculosis, plague, and endocarditis. Neomycin B has broad-spectrum antibacterial activity. Circle and label as many functional groups in these molecules as you can. Label each chiral carbon in Streptomycin. How many total stereoisomers exist for Streptomycin? Label each chiral carbon in Neomycin B. How many total stereoisomers exist for Neomycin B?
OH CHзCH-CHCHCH-CHз 4-hexen-3-ol Four stereoisomers exist for 4-hexen-3-ol. Draw the structure of the isomer that has the Z configuration around the double bond and the R 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. opy aste Previous Next
6. Use the molecule below to answer the following questions. a) Name the following molecule. b) Why is it necessary to provide R or S designation in order to clearly communicate molecular structure for this molecule? c) How many stereoisomers of this molecule are possible? Which of them are enantiomers to each other? Which are diastereomers? SH ICN
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
By first working out how many stereogenic centers are present in the following molecules, determine how many optical isomers exist
a) How many chiral centers exist in the following molecule structure A? b) How many possible stereoisomers would exist for structure A (including structure A) based on the correct number of chiral centers
4. - Determine the structural relationship between the compounds in each of the pairs that follow. They may be unrelated, identical (the same compound), constitutional isomers, diastereoisomers, enantiomers? - Identify the optically active (chiral) compounds and any meso compounds. - Assign a configuration (R or S) to all stereocenters. - Name all compounds so that the name reflects the structure unambiguously. a) b) c) d) e) f) H- HO- CHO H3C -NH₂ H- -H H- CH2OH H CH3 CH3 H Ph H CH3 H H CI Ph H H CI CH3 CH₂OH -OH -NH₂ CI H H CI & t OH CHO H3C H OH O-CH3 oma O-CH3 H3C OH

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