Does naphthalene undergo addition reactions?

Naphthalene also undergoes addition reactions more readily than benzene. It is reduced by sodium and amyl alcohol to tetra-hydronaphthalene, whereas benzene is unattacked by the reagent. The product tetralin is also obtained by the partial catalytic hydrogenation of naphthalene.

What is the chemical reaction of naphthalene?

In its chemical behaviour, naphthalene shows the aromatic character associated with benzene and its simple derivatives. Its reactions are mainly reactions of substitution of hydrogen atoms by halogen atoms, nitro groups, sulfonic acid groups, and alkyl groups.

Does naphthalene undergo Friedel Crafts reaction?

❖ Friedel Craft acylation of Naphthalene ➢ Naphthalene undergoes Friedel craft acylation easily to form acetyl naphthalene derivative. ➢ The product (α or β isomer) is dependent upon solvent used. ➢ The reagents used for acylation are AlCl3 and CH3COCl.

What is the process of synthesis of naphthalene?

Hint: There are five steps involved in the formation of naphthalene by Haworth synthesis. These are Friedel craft acylation, Clemmenson's reaction, heating the compound, Clemmenson reaction, and dehydrogenation. Two aromatic rings joined are known as naphthalene.

Does phenanthrene undergo addition reaction?

Although naphthalene, phenanthrene, and anthracene resemble benzene in many respects, they are more reactive than benzene in both substitution and addition reactions.

Naphthalene reaction || Addition reaction||

Why does naphthalene undergo electrophilic substitution reaction at alpha position?

question. Electrophilic substitution reaction in naphthalene is quite similar to benzene reaction. The alpha position is more stabilized than the beta position. The carbocation formed at an alpha position after the attack of an electrophile is much more stabilized by its resonance than the second position.

Is naphthalene an alkene?

As such, naphthalene is classified as a benzenoid polycyclic aromatic hydrocarbon (PAH).

What is sublimation of naphthalene?

Solution: The conversion of a solid directly to gaseous form and on cooling back to the solid-state is sublimation. Sublimation of naphthalene is a physical change because the state of matter changes.

What is the reaction of naphthalene in sulfuric acid?

(1) Naphthalene reacts with concentrated sulfuric acid to form β-naphthalene sulfonic acid at high temperature. The reaction is intense and the temperature is not easy to control. There are side reactions. Polysulfonation and sulfones may be formed, which affect the purity of the product.

What type of compound is naphthalene?

Naphthalene is a bicyclic aromatic hydrocarbon derived from coal tar or crude oil. It is an insecticide that is also used as a repellent. Its International Union of Pure and Applied Chemistry (IUPAC) name is naphthalene.

How does naphthalene obey Huckel's rule?

Naphthalene contain 10 π electrons. So, according to Hückel's Rule (n=2) naphthalene obeys (4n+2)π electron rule.

Why naphthalene undergo sulfonation reaction preferentially at beta position?

Naphthalene undergoes sulphonation at beta position at higher temperature. Beta derivative requires higher activation energy as compared to alpha derivative but once beta derivative formed , is thermodynamically more stable than alpha derivative.

Why is naphthalene considered as aromatic compound?

As we are getting a whole number from, 4nπ+2 formula for naphthalene, so naphthalene is aromatic. Therefore, the naphthalene is an aromatic compound according to Huckel's rule because it has 4nπ+2 delocalised electrons. Note: Pi bonds are known as delocalized bonds. Pi bonds cause the resonance.

What happens when solid naphthalene is added to water?

Explanation. Naphthalene is a nonpolar compound. Thus, it is insoluble in highly polar solvents like water. Non-polar solutes do not dissolve in polar solvents like water because they cannot compete with the strong attraction that the polar solvent molecules have for each other.

Does naphthalene sublime?

Naphthalene is a solid that sublimes at standard atmospheric temperature with the sublimation point at around 80 °C or 176 °F. At low temperature, its vapour pressure is high enough, 1 mmHg at 53 °C, to make the solid form of naphthalene evaporate into gas.

What happens when naphthalene is heated?

As the naphthalene is heated, heat energy is converted to kinetic energy. Kinetic energy increases and the molecules vibrate faster about their fixed positions and the temperature increases. Naphthalene is in solid state at any temperature below its melting point. ... The particles can only vibrate at a fixed position.

Is naphthalene soluble in h2so4?

The concentration of sulfuric acid solution ranged from 0 to 80wt%,. The solubilities of 2-naphthalenesulfonic acid monohydrate and sodium 2-naphthalenesulfonate increased with temperature, and both of them were the lowest at 70wt%, of sulfuric acid solution(w ₃ ⁰ =0.70)while the highest in pure water.

What happened when naphthalene is treated with Sulphuric acid at 165?

In industry naphthalene-monosulfonic acids are produced in a discontinuous process by reacting naphthalene batchwise with sulfuric acid, for the production of the α-acid at a temperature of up to about 50° C., for the preparation of the β-acid at a 160° to 165° C.

What happens when naphthalene is treated with concentrated Sulphuric acid at 165 C *?

Naphthalene reacts with concentrated sulfuric acid to yield naphthalenesulfonic acids.

How do naphthalene balls sublime?

Naphthalene undergoes sublimation easily, i.e., the change of state of naphthalene from solid to gas without the intervention of the liquid state. Thus, naphthalene balls keep forming naphthalene vapours that disappear into the air with time without leaving any solid.

Which of these undergo sublimation process?

Solution : Camphor, maphthalene, ammonium chloride, iodine, and dry ice are some substances which undergo sublimation.

Which of the following undergoes sublimation?

The correct answer is Ammonium chloride. Ammonium chloride can undergo sublimation, when it is heated, the substance undergoes changes from solid to gas.

What type of bonding is present in naphthalene?

The naphthalene ion forms unconventional carbon-based ionic hydrogen bonds with H2O and CH3OH (CH delta+center dot center dot center dot OH2 and CH delta+center dot center dot center dot OHCH3, respectively) which can be extended to hydrogen bonding chains with additional solvent molecules.

Is naphthalene aromatic or not?

Naphthalene, with two fused rings, is the simplest polycyclic aromatic molecule. Note that all the carbon atoms except those at the points of fusion have a bond to a hydrogen atom. Naphthalene, which has 10 π electrons, satisfies the Hückel rule for aromaticity.

Is naphthalene saturated or unsaturated?

Camphor and naphthalene unsaturated and alcohol is saturated. Naphthalene =unsaturated.