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.
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.
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Get started for freeTreatment oftert - butyl alcohol with concentrated HBrgives tert butyl bromide.
When the concentration of H+is doubled, the reaction rate doubles. When the concentration of tert- butyl alcohol is tripled, the reaction rate triples. When the bromide ion concentration is quadrupled, however, the reaction rate is unchanged. Write the rate equation for this reaction.
What would be the product ratio in the chlorination of propane if all the hydrogens were abstracted at equal rates?
When healthy, Earthโs stratosphere contains a low concentration of ozone (O3)that absorbs potentially harmful ultraviolet (UV) radiation by the cycle shown at right.
Chlorofluorocarbon refrigerants, such as Freon 12 (CF2Cl2), are stable in the lower atmosphere, but in the stratosphere, they absorb high-energy UV radiation to generate chlorine radicals.
The presence of a small number of chlorine radicals appears to lower ozone concentrations dramatically. The following reactions are all known to be exothermic (except the one requiring light) and to have high-rate constants. Propose two mechanisms to explain how a small number of chlorine radicals can destroy large numbers of ozone molecules. Which of the two mechanisms is more likely when the concentration of chlorine atoms is very small?
(a) Draw an approximate reaction-energy diagram for the acid-base reaction of phenol (see below) with 1-molar aqueous sodium hydroxide solution.
(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.
The following reaction is a common synthesis used in the organic chemistry laboratory course.
When we double the concentration of methoxide ion (CH3O-) , we find that the reaction rate doubles. When we triple the concentration of 1-bromopropane , we find the reaction rate triples.
(a) What is the order of this reaction with respect to 1-bromopropane? What is the order with respect to methoxide ion? Write the rate equation for this reaction. What is the overall order?
(b) One lab textbook recommends forming the sodium methoxide in methanol solvent, but before adding 1-bromopropane ,it first distills off enough methanol to reduce the mixture to half of its original volume. What difference in rate will we see when we run the reaction (using the same amounts of reagents) in half the volume of solvent?
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