Halogenalkanes

Nucleophiles are

• electron pair donors that attack regions of high electron density.

• electron pair donors that attack regions of low electron density.

• electron pair acceptors that attack regions of high electron density.

• electron pair acceptors that attack regions of low electron density.

Which of the following is essential if a species is to act as a nucleophile?

• A lone pair of electrons.

• A negative charge.

• An unpaired electron.

• A strongly polar bond.

Which of these compounds is a secondary halogenoalkane?

• CH₃CH(OH)CH₃

• CH₃CCl(CH )CH₃

• CH₃CHClCH₃

• CH₃CH₂ CH₂ Cl

Which one of the following will undergo nucleophilic substitution with sodium hydroxide (aq)?

• ethene

• ethane

• bromoethane

• cyclopentane

what is the mechanism of the reaction when sodium hydroxide in ethanolic condition reacts with cloroethane under reflux?

• nucleophilic substitution

• electrophilic addition

• free radical substitution

• elimination

which of the following is not the condition for the reaction between ammonia and chloromethane for nucleophilic substitution?

• aqueous ammonia

• ethanolic ammonia

• excess ammonia

• heated under reflux

what is the mechanism for the reaction between chloromethane and sodium hydroxide solution heated under reflux?

• free radical substitution

• electrophilic addition

• nucleophilic addition

• nucleophilic substitution

Name this structure.

• 1-chloro-2,2-dimethylpropane
• 3-chloro-2,2-dimethylpropane
• 1-chloro-2,2-methylpropane
• 3-chloro-2,2-methylpropane

Name this molecule:

• trifluoro-1-methylmethane
• 1,1,1-trifluoromethane
• trifluorethane
• 1,1,1-trifluoroethane

Why does the reaction

C₂H₅X + OH^- → C₂H₅OH + X^-

occur faster if X is iodine instead of Bromine?

• the I^- ion is a stronger nucleophile than the Br^- ion.

• the I^- ion is less hydrated in water than the Br^- ion

• C-Br bond is more polar than the C-I bond

• the C-Br bond is stronger than the C-I bond