Concept explainers
(a)
To determine: A three dimensional representation for the given structure, each chiral centre marked by star, any planes of symmetry, any enantiomer, any diastereomers and each structure labeled as chiral or achiral.
Interpretation: A three dimensional representation for the given structure with each chiral centre marked by star, any planes of symmetry, any enantiomer, any diastereomers are to be drawn and the structure is to be labeled as chiral or achiral are to be stated.
Concept introduction: If two compounds have same molecular formula but the spatial arrangement of atoms is different, then they are known as stereoisomers. Stereoisomers are further divided into two categories: optical isomers and geometrical isomers. The two different forms in which a single chiral carbon can exist is referred to as enantiomers. The class of diastereomers includes stereoisomers that are not enantiomers. They are not the mirror images of each other. There are two or more chiral centers generally present in diastereoisomers.
(b)
To determine: A three dimensional representation for the given structure, each chiral centre marked by star, any planes of symmetry, any enantiomer, any diastereomers and each structure labeled as chiral or achiral.
Interpretation: A three dimensional representation for the given structure with each chiral centre marked by star, any planes of symmetry, any enantiomer, any diastereomers are to be drawn and the structure is to be labeled as chiral or achiral are to be stated.
Concept introduction: If two compounds have same molecular formula but the spatial arrangement of atoms is different, then they are known as stereoisomers. Stereoisomers are further divided into two categories: optical isomers and geometrical isomers. The two different forms in which a single chiral carbon can exist is referred to as enantiomers. The class of diastereomers includes stereoisomers that are not enantiomers. They are not the mirror images of each other. There are two or more chiral centers generally present in diastereoisomers.
(c)
To determine: A three dimensional representation for the given structure, each chiral centre marked by star, any planes of symmetry, any enantiomer, any diastereomers and each structure labeled as chiral or achiral.
Interpretation: A three dimensional representation for the given structure with each chiral centre marked by star, any planes of symmetry, any enantiomer, any diastereomers are to be drawn and the structure is to be labeled as chiral or achiral are to be stated.
Concept introduction: If two compounds have same molecular formula but the spatial arrangement of atoms is different, then they are known as stereoisomers. Stereoisomers are further divided into two categories: optical isomers and geometrical isomers. The two different forms in which a single chiral carbon can exist is referred to as enantiomers. The class of diastereomers includes stereoisomers that are not enantiomers. They are not the mirror images of each other. There are two or more chiral centers generally present in diastereoisomers.
(d)
To determine: A three dimensional representation for the given structure, each chiral centre marked by star, any planes of symmetry, any enantiomer, any diastereomers and each structure labeled as chiral or achiral.
Interpretation: A three dimensional representation for the given structure with each chiral centre marked by star, any planes of symmetry, any enantiomer, any diastereomers are to be drawn and the structure is to be labeled as chiral or achiral are to be stated.
Concept introduction: If two compounds have same molecular formula but the spatial arrangement of atoms is different, then they are known as stereoisomers. Stereoisomers are further divided into two categories: optical isomers and geometrical isomers. The two different forms in which a single chiral carbon can exist is referred to as enantiomers. The class of diastereomers includes stereoisomers that are not enantiomers. They are not the mirror images of each other. There are two or more chiral centers generally present in diastereoisomers.
(e)
To determine: A three dimensional representation for the given structure, each chiral centre marked by star, any planes of symmetry, any enantiomer, any diastereomers and each structure labeled as chiral or achiral.
Interpretation: A three dimensional representation for the given structure with each chiral centre marked by star, any planes of symmetry, any enantiomer, any diastereomers are to be drawn and the structure is to be labeled as chiral or achiral are to be stated.
Concept introduction: If two compounds have same molecular formula but the spatial arrangement of atoms is different, then they are known as stereoisomers. Stereoisomers are further divided into two categories: optical isomers and geometrical isomers. The two different forms in which a single chiral carbon can exist is referred to as enantiomers. The class of diastereomers includes stereoisomers that are not enantiomers. They are not the mirror images of each other. There are two or more chiral centers generally present in diastereoisomers.
(f)
To determine: A three dimensional representation for the given structure, each chiral centre marked by star, any planes of symmetry, any enantiomer, any diastereomers and each structure labeled as chiral or achiral.
Interpretation: A three dimensional representation for the given structure with each chiral centre marked by star, any planes of symmetry, any enantiomer, any diastereomers are to be drawn and the structure is to be labeled as chiral or achiral are to be stated.
Concept introduction: If two compounds have same molecular formula but the spatial arrangement of atoms is different, then they are known as stereoisomers. Stereoisomers are further divided into two categories: optical isomers and geometrical isomers. The two different forms in which a single chiral carbon can exist is referred to as enantiomers. The class of diastereomers includes stereoisomers that are not enantiomers. They are not the mirror images of each other. There are two or more chiral centers generally present in diastereoisomers.
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Organic Chemistry (9th Edition)
- Shown 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_forwardplease draw the Fischer projections for this compound - star all chirality centers - indicate any mirror planes as dashed lines - assign R/S notation - show priorities 1-arrow_forward6. Determine whether each compound is chiral or achiral. select the single best answer for each part.arrow_forward
- 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.arrow_forwardGlucose is a simple sugar with five substituents bonded to a sixmembered ring.a.Using a chair representation, draw the most stable arrangement of these substituents on the six-membered ring. b.Convert this representation to one that uses a hexagon with wedges and dashed wedges. c.Draw a constitutional isomer of glucose. d.Draw a stereoisomer that has an axial OH group on one carbon.arrow_forwardBased on the image. What is 1. The anti-conformer of hexane in Newman projection. 2. The equivalent structure of LAM in sawhorse representation. 3.arrow_forward
- a).Consider the Fischer projections of the following pair of stereoisomers. Name eachstructure in the pair according to IUPAC nomenclature, using appropriate R/S designation to show handedness. b).Draw the missing stereoisomer(s)in this set. Indicate the relationship (enantiomers or diastereomers) between every possible pairing of compounds. Circle a pair of compounds that, if present in equal amounts, will not show optical activity. If one of these compounds has a specific rotation of -7.9owhen isolated, what is the specific rotation of the other?arrow_forwardFor molecule CH3CH2CH(OH)CH3a. Identify chiral centreb. Draw a pair of enantiomers using 3-dimensional structurearrow_forwardUsing the priority rule, identify the configuration at each chiral center and the configuration of the double bond: For a chiral center please type EXACTLY one of the following: R or S or neither if it is not a chiral center. For a double bond please type EXACTLY one of the following: E or Z or neither if the double bond has no stereochemistry.arrow_forward
- (A) How many chirality centers does the following molecule contain? (B) How many stereoisomers are possible for this molecule? (C) Assign R,S designation to each chiral carbonarrow_forwardA chiral center is a(n) (select all that apply): a) plane of symmetry so that there are no stereoisomers b) tetrahedral atom bonded to 4 different substituents c) tetrahedral atom d) non-superimposable mirror image e) atom bearing groups such that interchanging of any two groups leads to a stereoisomer d) enantiomerarrow_forwardTrabectedin, shown in a ball-and-stick model on the cover of this text, is an anticancer drug sold under the trade name Yondelis. a. Locate the stereogenic centers in trabectedin. b.What is the maximum number of stereoisomers possible for trabectedin? c.Draw the enantiomer. d.Draw a diastereomer. e.If the specific rotation of trabectedin is +41.5, what is the [α] of a solution that contains 75% trabectedin and 25% of its enantiomer?f . What is the ee of a solution with [α] = +10.5?arrow_forward
- Organic Chemistry: A Guided InquiryChemistryISBN:9780618974122Author:Andrei StraumanisPublisher:Cengage Learning