How will you convert the following propene to 2/3-Dimethylbutane?

How will you convert the following propene to 2/3-Dimethylbutane?

Answer. 1> first treat the Propene with HBR to form 2-bromopropane. 2>In second step treat it with Na in the presence of dry ether to get 2,3-dimethyl butane.

How will you prepare 2 3-Dimethylbutane from alkyl halide?

2,3-dimethylbutane is obtained by the action of sodium metal on an alkyl halide. 2,3-Dimethylbutane is obtained from Isopropyl bromide (2-Bromopropane) when reacted with Na metal in presence of ether. It is an example of the Wurtz reaction.

Can Wurtz reaction make 2 3-Dimethylbutane?

Wurtz reaction gives Sodium halide as a side product in the reaction. Complete step by step answer: So, we can conclude that 2,3-dimethylbutane is the final product of the reaction. Therefore the correct answer is (C) 2,3-dimethyl butane.

What is Wurtz reaction example?

Wurtz Reaction Equation As an example, we can obtain ethane by reacting methyl bromide with sodium in the presence of anhydrous ether or tetrahydrofuran. Here, a large alkane molecule is developed by the joining two compound of alkyl halide and eradicate the halogen atoms in the form of sodium halide.

Which metal is used in Wurtz reaction?

sodium metal

What is Wurtzreaction explain with examples?

The reaction in which alkyl halides on treatment with sodium metal in dry ethereal (free from moisture) solution give higher alkanes is known as Wurtz reaction and is used for the preparation of higher alkanes containing even number of carbon atoms.

Why Wurtz reaction is not suitable for preparation of unsymmetrical?

Example: Wurtz reaction cannot be used for the preparation of unsymmetrical alkanes because if two dissimilar alkyl halides are taken as the reactants, then a mixture of alkanes is obtained as the products. Since the reaction involves free radical species, a side reaction also occurs to produce an alkene.

In which case sn2 Ar reaction is fastest?

3. The Reaction Rate Of The SN2 Reaction Is Fastest For Small Alkyl Halides (Methyl > Primary > Secondary >> Tertiary) Finally, note how changes in the substitution pattern of the alkyl halide results in dramatic changes in the rate of the reaction.

What is meant by unsymmetrical alkanes?

An unsymmetrical alkene is an alkene in whose molecule the pair of ligands on one doubly bonded carbon is different from that on the other. eg. 1: In 1, one doubly bonded carbon bears two methyl groups and the other a methyl group and a hydrogen atom. Thus, 1 is an unsymmetrical alkene.

How are unsymmetrical alkanes formed?

Wurtz reaction cannot be used for the preparation of unsymmetrical alkanes because if two dissimilar alkyl halides are taken as the reactants, then a mixture of alkanes is obtained as the products. Since the reaction involves free radical species, a side reaction also occurs to produce an alkene.

Is asymmetrical or unsymmetrical?

As adjectives the difference between unsymmetrical and asymmetrical. is that unsymmetrical is not symmetrical while asymmetrical is not symmetrical.

Why is propane unsymmetrical?

An unsymmetrical alkene is one like propene or but-1-ene in which the groups or atoms attached to either end of the carbon-carbon double bond are different. For example, in propene there are a hydrogen and a methyl group at one end, but two hydrogen atoms at the other end of the double bond.

What happens when HBr and propane?

Addition of HBr to propene yields 2-bromopropane.

What is a symmetrical alkyne?

A symmetrical alkyne is an alkyne in whose molecule the triply bonded carbon atoms bear the same ligands. eg: In an organic molecule, a carbon-carbon triple bond of which the carbon atoms bear the same ligands is called a symmetrical triple bond.

What is the difference between symmetrical and unsymmetrical alkene?

Symmetrical alkenes have the same atoms on both sides of the double bond… Unsymmetrical alkenes have different atoms on each side… but-1-ene….

Is 2 butene unsymmetrical?

eg. 2: In 2, one doubly bonded carbon bears two methyl groups and the other a methyl group and an ethyl group. Thus, 2 is an unsymmetrical alkene.

Why is 2 Bromopropane the major product?

Here we see that in principle, propene can protonate to give two different carbocations, one 2o and the other 1o. Formation of the more stable 2o carbocation is preferred. The carbocation then reacts with the nucleophile to give the alkyl bromide and hence 2-bromopropane is the major product.

Are double bonds electrophilic or nucleophilic?

An electrophile will attract those electrons, and can pull them away to form a new bond. This leaves one carbon with only 3 bonds and a +ve charge (carbocation). The double bond acts as a nucleophile (attacks the electrophile).

Which gives nucleophilic addition most easily?

acetone will give easily because as carbocation will form and there are two CH3 group in acetone which will stabilise it.

Why can’t a nucleophilic attack an alkene?

An alkene is a naturally electron-rich system, so electrophiles rather than nucleophiles would inherently attract them, but nucleophiles will strike them with an acceptable degree of electron deficiency induced by EWGs.

Are double bonds good nucleophiles?

Yes, alkenes are nucleophiles. The π bond is localized above and below the C-C σ bond. These π elecrons are relatively far from the nuclei and are loosely bound. The double bond acts as a nucleophile (Lewis base) when it attacks the electrophile.