What type of reaction is the bromination of trans-stilbene?

What type of reaction is the bromination of trans-stilbene?

Bromine and chlorine readily undergo addition reactions with alkenes. This practical involves the bromination of trans-stilbene using a 10% bromine dichloromethane solution. Hence, an addition reaction takes place an 1,2-dibromo-1,2-diphenylethane is formed.

What is the reaction mechanism for the bromination of alkene?

Alkenes react in the cold with pure liquid bromine, or with a solution of bromine in an organic solvent like tetrachloromethane. The double bond breaks, and a bromine atom becomes attached to each carbon. The bromine loses its original red-brown color to give a colorless liquid.

What is the intermediate in the bromination of stilbene?

Trans-stilbene undergoes reaction with bromine to form an intermediate bromonium ion, which is further attacked from the opposite side to give specifically one product.

Why did you use pyridinium bromide Perbromide instead of bromine?

In these two bromination reactions, pyridinium tribromide will be used as the source of bromine. This solid reagent is safer and easier to handle than elemental bromine, which is a highly corrosive liquid.

How does the bromine test work?

The test uses a type of chemical reaction called addition, where a reactant, here bromine, is added to an organic compound to break a double or triple bond. Bromine has an orange-brownish color when in solution, so the color of the solution is lost when an alkene or alkyne is present for bromine to react with.

What happens during bromination?

The bromination reactions and mechanisms are compared. UV light splits the bromine molecule into two reactive radicals, resulting in a very slow loss of amber bromine color. The radical bromine atoms can then go on to react with other species in solution (including each other) in a chain reaction.

What is the molar mass of stilbene dibromide?

340.05
Stilbene;dibromide

Is pyridinium tribromide a Lachrymator?

Corrosive solid; causes severe skin burns and serious eye damage. Possible lachrymator and respiratory tract irritant. Exists in equilibrium with bromine when dissolved in solution.

Is pyridinium tribromide an organic solvent?

Pyridinium perbromide (also called pyridinium bromide perbromide, pyridine hydrobromide perbromide, or pyridinium tribromide) is an organic chemical composed of a pyridinium cation and a tribromide anion….Pyridinium perbromide.

What is the bromination of trans-stilbene?

As most chemicals used in this experiment are toxic / harmful, PPE must be used throughout and the experiment should be carried out inside a fume hood. Bromine and chlorine readily undergo addition reactions with alkenes. This practical involves the bromination of trans-stilbene using a 10% bromine dichloromethane solution.

What is the addition reaction of trans-stilbene?

BROMINATION OF TRANS – STILBENE. Hence, an addition reaction takes place an 1,2-dibromo-1,2-diphenylethane is formed. MECHANSIM: The alkene, trans-stilbene, acts as a nucleophile and the bromine acts as an electrophile. Hence, the nucleophilic double bond undergoes an electrophilic addition reaction by the bromine reagent.

What is the aim of this experiment trans-stilbene and bromine reagent?

The aim of this experiment is to carry out an addition reaction using trans-stilbene and bromine reagent to produce 1,2-dibromo-1,2-diphenylethane. As most chemicals used in this experiment are toxic / harmful, PPE must be used throughout and the experiment should be carried out inside a fume hood.

Is trans-stilbene nucleophilic or electrophile?

MECHANSIM: The alkene, trans-stilbene, acts as a nucleophile and the bromine acts as an electrophile. Hence, the nucleophilic double bond undergoes an electrophilic addition reaction by the bromine reagent.