(a)
To determine: The validation of the fact that cis-cycloctene is a meso compound under the original definition, but not under working definition.
Interpretation: The validation of the fact that cis-cycloctene is a meso compound under the original definition, but not under working definition is to be stated.
Concept introduction: The class of diastereoisomers includes stereoisomers that are not enantiomers. They are not mirror images of each other. There are two or more chiral centers generally present in diastereoisomers. Structures of diastereoisomers are not the same, but they are stereoisomers because they differ in the spatial arrangement of atoms.
(b)
To determine: The validation of the fact that a double allene is a meso compound under the original definition, but not under working definition.
Interpretation: The validation of the fact that a double allene is a meso compound under the original definition, but not under working definition is to be stated.
Concept introduction: The class of diastereoisomers 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. Structures of diastereoisomers are not the same, but they are stereoisomers because they differ in the spatial arrangement of atoms.
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Organic Chemistry, Books a la Carte Edition (9th Edition)
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