Concept explainers
(a)
Interpretation: The name of the given structure needs to be determined.
Concept Introduction: Chair conformation is the most stable conformation of cyclohexane. It is represented as follows:
Here, the substituted groups in the chair conformation are represented as follows:
The groups showing in straight upward and downward directions are axial and the groups bend slightly right or left are equatorial.
The axial and equatorial groups are represented in the chair conformation as A and E:
(b)
Interpretation: The given structure on the right needs to be completed which is obtained by chair flip.
Concept Introduction:After a chair flip, all the axial bonds become equatorial and all the equatorial bonds become axial. But, the groups in the up direction remains upward and groups in down direction remain downward.
Also, if the molecule is cis, it remains cis even after chair flip. The same is the case with trans molecule.
(c)
Interpretation: The name of the structure formed after the chair flip in part (b) needs to be determined.
Concept Introduction: Chair conformation is the most stable conformation of cyclohexane. It is represented as follows:
Here, the substituted groups in the chair conformation are represented as follows:
The groups showing in straight upward and downward directions are axial and the groups bend slightly right or left are equatorial.
The axial and equatorial groups are represented in the chair conformation as A and E:
(d)
Interpretation: Whether the two structures are consistent with the given facts about chair flip or not needs to be determined.
Concept Introduction:
The chair conformation of cyclohexane is represented as follows:
During the flipping, no bond is break. The numbering in the chair form is represented as follows:
During ring flipping, mirror image of the chair conformation is formed.
It is represented as follows:
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Chapter 7 Solutions
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- A student suggests that the molecule on the right can be made from a single molecule with one less ring in it. If the student is correct, draw the starting material below, otherwise, check the box under the drawing area. ? + NaOH Click and drag to start drawing a structure. olo Ararrow_forwardA. Draw the major resonance structure, then draw curved arrows to show how this can be converted to the Lewis structure given. B. Thionitromethane is redrawn for you. Draw curved arrows to show how this can be converted to the resonance structure you drew in part A.arrow_forwardShown below is Streptomycin, and Neomycin B. Circle and label as many functional groups in these molecules as you can. a. Label each chiral carbon in Streptomycin. How many total stereoisomers exist for Streptomycin? b. Label each chiral carbon in Neomycin B. How many total stereoisomers exist for Neomycin B?arrow_forward
- Must answer completearrow_forwardALL ONE QUESTION THANKS Make a line and 3d model of each molecule below A.) What type of bonds are in each molecule B.) which bonds allow rotationarrow_forwardConstruct 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.arrow_forward
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Organic Chemistry: A Guided InquiryChemistryISBN:9780618974122Author:Andrei StraumanisPublisher:Cengage Learning