Whether the Friedal-Crafts reaction of benzene with (R)-2-chlorobutane will lead to an optically active or racemic product is to be explained. Concept introduction: The Friedal-Crafts reaction occurs through the formation of a carbocation intermediate. The carbocation is a planar species, as the positively charged carbon is in sp 2 hybridized state. The reaction with the aromatic ring can occur from both sides of the carbocation. Hence normally a racemic mixture is obtained as the product. To explain: Whether the Friedal-Crafts reaction of benzene with (R)-2-chlorobutane will lead to an optically active or racemic product is to be explained.

Question

10.00 g of Compound X with molecular formula C₂Hg are burned in a constant-pressure calorimeter containing 40.00 kg of water at 25 °C. The temperature of the water is observed to rise by 2.604 °C. (You may assume all the heat released by the reaction is absorbed by the water, and none by the calorimeter itself.) Calculate the standard heat of formation of Compound X at 25 °C. Be sure your answer has a unit symbol, if necessary, and round it to the correct number of significant digits.

Answer 1

Question

Chapter 16.SE, Problem 63AP

Interpretation Introduction

Interpretation:

Whether the Friedal-Crafts reaction of benzene with (R)-2-chlorobutane will lead to an optically active or racemic product is to be explained.

Concept introduction:

The Friedal-Crafts reaction occurs through the formation of a carbocation intermediate. The carbocation is a planar species, as the positively charged carbon is in sp² hybridized state. The reaction with the aromatic ring can occur from both sides of the carbocation. Hence normally a racemic mixture is obtained as the product.

To explain:

Whether the Friedal-Crafts reaction of benzene with (R)-2-chlorobutane will lead to an optically active or racemic product is to be explained.

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10.00 g of Compound X with molecular formula C₂Hg are burned in a constant-pressure calorimeter containing 40.00 kg of water at 25 °C. The temperature of the water is observed to rise by 2.604 °C. (You may assume all the heat released by the reaction is absorbed by the water, and none by the calorimeter itself.) Calculate the standard heat of formation of Compound X at 25 °C. Be sure your answer has a unit symbol, if necessary, and round it to the correct number of significant digits.

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