(a)
Interpretation:
It is to be shown that the given molecule does not have a plane of symmetry.
Concept introduction:
A plane of symmetry is an internal mirror plane that divides the molecule into two halves that are superimposable mirror images of each other.
(b)
Interpretation:
The molecule’s mirror image is to be drawn. It is to be shown that the molecule and its mirror image are superimposable.
Concept introduction:
A molecule’s mirror image is obtained by reflecting every atom through a mirror plane. The mirror image can be rotated through different axes to see if the molecule and its mirror image are superimposable.
(c)
Interpretation:
The location of the point of symmetry of the molecule is to be identified.
Concept introduction:
For each atom in the molecule, if there is an identical atom at an equal distance across the center of the molecule, the central point is called the point of symmetry.
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ORGANIC CHEMISTRY E-BOOK W/SMARTWORK5
- True or False: It is possible for a molecule to have a mirror plane that is parallel to the principal rotation axis, and a mirror plane that is perpendicular to the principal rotation axis. (If true, give an example. If false, briefly explain why.)arrow_forwardDo these molecules has centre of symmetry(C.O.S)? If not,why? If we draw lines passing through the center of the molecule,it meets identical atoms(here both Br atoms and Cl atoms).arrow_forwardWhich of the following possess a plane of symmetry? (Choose all that apply.)arrow_forward
- Compounds with several chiral centres may have configurations referred to as meso. Meso configurations arise when the molecule can adopt a configuration with an internal mirror plane. When this occurs, the mirror image of a molecule with an internal mirror plane is an identical configuration. Thus, even though the molecule may possess several chiral centres, they are reflection of each other (within the molecule) thus resulting in an achiral meso form. This occurs for example for tartaric acid (Figure 3.1). Because of this, tartaric acid only has three stereoisomers instead of four. It has the two chiral (R,R) and (S,S) enantiomers, and the meso form. Figure 3.1. Stereoisomers of tartaric acid. Given the information above on meso forms, how many different stereoisomers do compounds A to D (Figure 3.2) have? Figure 3.2. Structure of compounds A, B, C and D.arrow_forwardHow many symmetry planes and symmetry axis in C3H8O. also is there a center of symmetry in C3H8O?arrow_forwardDetermine the total number of IR active vibrational modes of cyclohexane chair conformation?arrow_forward
- What is name of the rotation axis of highest n in the molecule 1,3-cyclobutadiene ?arrow_forwardDoes the following structure represent a meso compound? If so, indicate the symmetry plane.arrow_forwardIn your own words, explain why an object that has more symmetry elements is said to have higher symmetry than an object with fewer symmetry elements.arrow_forward
- Organic Chemistry: A Guided InquiryChemistryISBN:9780618974122Author:Andrei StraumanisPublisher:Cengage LearningPhysical ChemistryChemistryISBN:9781133958437Author:Ball, David W. (david Warren), BAER, TomasPublisher:Wadsworth Cengage Learning,