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Chapter 5: Q56 E_b. (page 148)

Identify the indicated faces in the following molecules as Re or Si:

(a)

(b)

Short Answer

Expert verified

(b)

Step by step solution

01

Re or Si face

There are two planar faces in a compound, with a prochiral hybridized group designated Re and Si faces.The ‘Re’ face is clockwise, and the ‘Si’ face is anticlockwise. The Si face can be obtained by flipping the molecule.

02

The faces in the crotonate molecule

(b) According to C.I.P. sequence order, ‘Re’ face is given to the lower planar face, which is clockwise. ‘Si’ face is given to the upper planar face, which is anticlockwise.


Re and Si faces in crotonate

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Most popular questions from this chapter

Which of the following objects are chiral?

(a) A basketball

(b) A fork

(c) A wine glass

(d) A golf club

(e) A spiral staircase

(f) A snowflake

(d)

(S)-1-Chloro-2-methylbutane undergoes light-induced reaction with Cl2to yield a mixture of products, among which are 1,4-dichloro-2-methylbutane and 1,2-dichloro-2-methylbutane.

  1. Write the reaction, showing the correct stereochemistry of the reactant.
  2. One of the two products is optically active, but the other is optically inactive. Which is which?

Assign R or S configuration to each chirality center in pseudoephedrine, an over-the-counter decongestant found in cold remedies (blue = N)

Q 31 Which of the following objects are chiral?

(a) A basketball

(b) A fork

(c) A wine glass

(d) A golf club

(e) A spiral staircase

(f) A snowflake

Draw the meso form of each of the following molecules, and indicate the plane of symmetry in each:

(a)

(b)

(c)
See all solutions

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