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Chapter 4: Q33P (page 233)

When it is strongly heated, methyl diazoacetate decomposes to give a nitrogen gas and a carbene. Draw a Lewis structure of the carbene.

Short Answer

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Carbenes may be defined as a neutral divalent chemical species containing a carbon atom consisting six electrons in their valence shell. Out of six electrons, two electrons are unshared. The simplest carbene is methylene .

Step by step solution

01

Carbenes

Carbenes may be defined as a neutral divalent chemical species containing a carbon atom consisting six electrons in their valence shell. Out of six electrons, two electrons are unshared. The simplest carbene is methylene .

02

Lewis structures

The formation of covalent bond in molecules is shown in an easier way by Lewis structures. The valence electrons are represented by dots in the Lewis structure and one bond is represented as two electrons. In drawing Lewis structures, the atoms are arranged in such a way that all of them have eight valence electrons. The exception is with hydrogen, which can have a maximum of two valence electrons.

03

Decomposition of methyl diazoacetate to nitrogen and carbene

04

Lewis structure of carbene

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Most popular questions from this chapter

For each compound, predict the major product of free-radical bromination. Remember that bromination is highly selective, and only the most stable radical will be formed.

(a) cyclohexane

(b) methylcyclopentane

(c) decalin

(d) hexane

(e)

(f)

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(b) On the same diagram, draw an approximate reaction-energy diagram for the acid-base reaction oftert- butyl alcohol(see below) with 1-molar aqueous sodium hydroxide solution.

In the presence of a small amount of bromine, cyclohexene undergoes the following light-promoted reaction:

(a) Propose a mechanism for this reaction.

(b) Draw the structure of the rate-limiting transition state.

(c) Use Hammond鈥檚 postulate to predict which intermediate most closely resembles this transition state.

(d) Explain why cyclohexene reacts with bromine much faster than cyclohexane, which must be heated to react.

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