Concept explainers
(a)
Interpretation:
Whether the given pair of molecules are identical, or enantiomers should be determined.
Concept Introduction:
Identical molecules are the ones with no isomers, neither constitutional isomers nor stereoisomers. Identical molecules have the same structural arrangement of atoms and the same three-dimensional arrangement.
Isomers are the molecules with the same formula but either with different structural arrangement (constitutional isomers) or different three-dimensional arrangement (stereoisomers).
A tetrahedral carbon atom bonded to four different groups is called a chiral center. A Molecule having at least one chiral center is a chiral molecule. Molecules that do not have any chiral centers are called achiral. Identical molecules do not have any chiral centers; therefore, they are achiral.
When the mirror images of a chiral molecule are not superimposable, those mirror images become stereoisomers called enantiomers.
(b)
Interpretation:
Whether the given pair of molecules are identical, or enantiomers should be determined.
Concept Introduction:
Identical molecules are the ones with the same chemical formula but no isomers, neither constitutional isomers nor stereoisomers. Identical molecules have the same structural arrangement of atoms and the same three-dimensional arrangement.
Isomers are the molecules with the same formula but either with different structural arrangement (constitutional isomers) or different three-dimensional arrangement (stereoisomers).
A tetrahedral carbon atom bonded to four different groups is called a chiral center. A Molecule having at least one chiral center is a chiral molecule. Molecules that do not have any chiral centers are called achiral. Identical molecules do not have any chiral centers; therefore, they are achiral.
When the mirror images of a chiral molecule are not superimposable, those mirror images become stereoisomers called enantiomers.
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- Part D. Do the two structures A and B of each pair drawn below represent the same molecule, constitutional isomers, or stereoisomers? If A and B are stereoisomers, further classify them as enantiomers or diastereomers. H3C Structure A H3C HO H3C H3C Br T H H3C H HO H3CC H C Br HC H H H H CH₂Br CH₂CH3 H CH₂CH3 CH₂OH OH H HO G G H HO H HO G CH3 CH3 CH3 Br Hallo H H3C H Structure B H3C CH3 Br WING H Br HOCH₂ CH3 CH3 HO H CH₂OH H CH₂CH3 H CH₂CH3 H H H H H H Gim CH3 H OH "H ·GII. CH3 HO. OH OH CH3 CH3 OH Relationship of A and Barrow_forwardName Consider the 2,3-dibromobutane family of stereoisomers. How are the compounds in each pair related to each other? 1) Identical 2) Enantiomers 3) Diastereomers H3C CH3 H3C CH3 Br Br H H. H3C CH3 H3C CH3 В Br Br H3C CH3 H3C CH3 Br H. H. Br H3C CH3 H3C CH3 Br H. H3C E CH3 H3C CH3 Br Br H. Brarrow_forwardWhich of the following statements is/are correct? Br Br Br Br CI 'P' 'R' 'S' .D. A. P and Q are non-superimposable mirror images of each other. B. R and S are non-superimposable images of each other. C. Q and R are same compound. D. Q and S are enantiomers. E. statements A and B are correct.arrow_forward
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