Halogenoalkanes

Name that haloalkane

• 1,2,3-dichlo-methyl-propane

• 1,3-dichloro-2-methyl-propane

• 1,3-dichloro-butane

• 1,2-dichloro-2,2-dimethyl-propane

What's a nucleophillic substitution reaction ?

• a halogen atom is exchanged for a new atom; new atom attacks the carbon and creates a halide ion

• a hydrogen atom is exchanged for a carbon atom; hydrogen atom attacks the carbon and creates a halide ion

• A process with start, middle and end

• A process with initiation, propagation and termination

Tags

NGSS.HS-PS1-2

What is an elimination reaction ?

• One carbon atom and one oxygen atom are removed from two of the carbon atoms and a double bond forms between two carbon aroms.

• Whena dipole molecule approaches the hydrocarbon, it attacks and bonds to any carbon and the other side of the dipole atom attaches to the adjacent carbon.

• One hydrogen atom and halogen atom are removed from neighbouring carbon atoms in the molecule and a double bond forms between the two carbon atoms.

Which step is this in the synthesis of chloroalkanes?

• Termination

• Initiation

• Propagation

• Position

A particle with an unpaired electron:

• Ion

• Nucleophile

• Free Radical

• Neutrophile

Tags

NGSS.HS-PS1-1

If the halogenoalkane reacts with cold hydroxide ions (nucleophile) in water, this will be produced:

• an alkane

• an alkene

• a carboxlyic acid

• an alcohol

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

Tags

NGSS.HS-PS1-5

Name this molecule:

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

Pentanenitrile can be made by reaction of 1-bromobutane with potassium cyanide.

Which of these is the correct name for the mechanism of this reaction?

• Electrophilic addition

• Electrophillic substitution

• Nucleophilic substitution

• Nucleophillic addition

How many different alkenes are formed when 2-bromo-3-methylbutane reacts with ethanolic potassium hydroxide

• 2

• 3

• 4

• 5