Class: Date ich of the following structures is different from the other three? b
ID: 547350 • Letter: C
Question
Class: Date ich of the following structures is different from the other three? b. 2 c. 3 d. 4 10. Which of the following is the definition of a pair of enantiomers? a. A pair of structures that are superposable mirror images of one another b. A pair of stereoisomers that are non-superposable mirror images of one another c. A pair of stereoisomers that are not mirror images of one another d. A pair of stereoisomers that have equal specific rotations 11. Which of the following is the definition of a pair of diastereomers? a. A pair of structures that are superposable mirror images of one another b. A pair of stereoisomers that are non-superposable mirror images of one another c. A pair of stereoisomers that are not mirror images of one another d. A pair of stereoisomers that have equal specific rotations 12. Which of the following statements is not true regarding pairs of enantiomers? a. They have identical melting points b. They have identical boiling points c. They rotate plane polarized light in opposite directions d. They react at identical rates with chiral reagents Page 3 Copynight Cengage Learning. Powered by CogneroExplanation / Answer
Q9) Structure 2 is different from other three.
1,3 and 4 are identical structures represented in diferent ways.
In structure 2 the 3rd and 4 th carbon [Ch2 -CH(CH3)2]are inter changed that makes it different from others.
Thus option b is correct.
10) option b
A pair of enantiomers are the stereoisomers that are NON-SUPERIMPOSABLE MIRROR IMAGES of each other and possess an optical rotation of equal magnitude but with opposite sign.
11)option C
A pair of diasteromers are the stereoisomers that are NOT MIRROR IMAGES of each other.
They possess different optical rotations.
12)option D
The enantiomers react with different speeds with chiral reagents not identical speed.