Given that the reaction of (S)-3-methyl-2-pentanone with methylmagnesium bromide followed by acidification yields 2,3-dimethyl-2-pentanol. The stereochemistry of the product is to be given and whether it is optically active or not is to be stated. Concept introduction: If during a reaction of an optically active compound a new chiral centre is created, it will lead to the formation of diastereomers in different proportions resulting in an optically active mixture. If a new chiral centre is not created then also the product will be optically active since the chirality of the other carbon remains unaffected during the course of the reaction. To give: The stereochemistry of the product, 2,3-dimethyl-2-pentanol, formed in the reaction of (S)-3-methyl-2-pentanone with methylmagnesium bromide followed by acidification. To state: Whether the product is optically active or not.

Question

The reaction of solid dimethylhydrazine, (CH3)2N2H2, and liquefied dinitrogen tetroxide, N2O4, has been investigated for use as rocket fuel. The reaction produces the gases carbon dioxide (CO2), nitrogen (N2), and water vapor (H2O), which are ejected in the exhaust gases. In a controlled experiment, solid dimethylhydrazine was reacted with excess dinitrogen tetroxide, and the gases were collected in a closed balloon until a pressure of 2.50 atm and a temperature of 400.0 K were reached.(a) What are the partial pressures of CO2, N2, and H2O?(b) When the CO2 is removed by chemical reaction, what are the partial pressures of the remaining gases?

Answer 1

Question

Chapter 17.SE, Problem 61AP

Interpretation Introduction

Interpretation:

Given that the reaction of (S)-3-methyl-2-pentanone with methylmagnesium bromide followed by acidification yields 2,3-dimethyl-2-pentanol. The stereochemistry of the product is to be given and whether it is optically active or not is to be stated.

Concept introduction:

If during a reaction of an optically active compound a new chiral centre is created, it will lead to the formation of diastereomers in different proportions resulting in an optically active mixture. If a new chiral centre is not created then also the product will be optically active since the chirality of the other carbon remains unaffected during the course of the reaction.

To give:

The stereochemistry of the product, 2,3-dimethyl-2-pentanol, formed in the reaction of (S)-3-methyl-2-pentanone with methylmagnesium bromide followed by acidification.

To state:

Whether the product is optically active or not.

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