Benzene Essays

Styrene Styrene is a toxic chemical that goes by many names such as ; Vinylbenzene , Ethenylbenzene , Phenyl Ethylene, Benzene and etc. Styrene is a colorless liquid that has an unsaturated ring that contains alternating double and single bonds ( Aromatic odor ).*This is an example of an aromatic compound known as Benzene, as shown above the unsaturated ring contains alternating double and single bonds. Styrene is a very important component that is used in making everyday products that you and I

is the rate-determining step, the benzene ring forms a sigma-bond to the aromatic ring, forming an intermediate structure. Thenafter, the proton is removed, forming the substituted aromatic ring. The product of the reaction is affected by the nucleophilic compound’s substituent and the site where the electrophilic substitution will occur. The substituent on the nucleophile affects its reactivity towards the electrophilic. For example, aniline allows the benzene ring to react more to the electrophilic

Lab Report 10: Nitration of Bromobenzene Raekwon Filmore CM 244 Section 40 March 27, 2018 Introduction: For this experiment, nitration of bromobenzene was the focus of the lab. The benzene is an aromatic compound and when it reacts with wither a mixture of sulfuric acid or nitric acid creates what is known as a nitro group. The formation of the nitro group is possible because it is an electrophilic aromatic substitution reaction. The creation of the nitronium ion is shown below: The reaction

For this experiment, a nitro arene was prepared and then the relative rates of bromination for a set of arenes was observed. Electrophilic aromatic substitution is the reaction of an electrophile with an aromatic ring to form a new bond between the aromatic ring and the electrophile. Two experiments were performed. First, the preparation of 4-nitro-1-bromobenzene takes place through a nitration of bromobenzene. The bromobenzene in this reaction will be treated with both sulfuric and nitric acid

hydrogen atom of benzene or benzene derivative is replaced by bromine due to an electrophilic attack on the benzene ring. The purpose of this experiment is to undergo bromination reaction of acetanilide and aniline to form 4-bromoacetanilide and 2,4,6-tribromoaniline respectively. Since -NHCOCH3 of acetanilide and -NH2 of aniline are electron donating groups, they are ortho/para directors due to resonance stabilized structure. Even though the electron donating groups activate the benzene ring, their

Electrophilic Aromatic Substitution 5. Introduction In this experiment, the directing effects of a bromo substituent was observed in the nitration by an electrophilic aromatic substitution reaction. The nitration was done with the addition of a nitric acid and sulfuric acid solution to bromobenzene, which was an exothermic reaction. When the reaction subsided, the mixture was heated before it was poured on ice and then neutralized to a pH of 8 with sodium carbonate. Liquid-liquid extraction was

The objective of this lab was to obtain a pure sample of methyl nitrobenzoate. This was done by performing a crystallization, vacuum filtration, and a recrystallization. Nitration is a commonly used reaction that involves an additional reaction that results in a resonance-stabilized intermediate that is later deprotonated to regenerate an aromatic ring. Because of methyl benzoate’s substituent, the nitro group is added in the meta position. The procedure included combining sulfuric acid, methyl benzoate

oC. then, gas flow to chloride absorbers to remove chloride from gas and send to different please. Furthermore, the separated liquid from recontacting drum heated by shell side of liquid exchanger and send LPG absorber drum but before added benzene from benzene recovery

In this experiment, extraction was used as a separation technique to separate the acid, base, and neutral compounds. In extraction, two immiscible solvents with opposite polarities are used to dissolve different parts of the solute with different polarities, so they form two distinct liquid layers. In this experiment, methanol, an organic solvent, and an aqueous solution were used as the two immiscible solvents. The extraction solvent must also be capable of dissolving one of the mixture components

In the synthesized Friedel-Craft acylation reaction mechanism, anisole (methoxybenzene) is the nucleophile. The double bond on the nucleophile attacks the electrophile acetyl. The acetyl compound is then bound to the anisole in the para position, which created the product p-methoxyacetophenone. Since anisole is an activator (electron donor), the acetyl could have bound in either the ortho or para position (or in the meta position, but it is not as likely). However, the reason that acetyl was not

Assignment- ASG1 Safety & health at work Explain the role of communications & training in the promotion & provision of health & safety in the workplace Communication is very important in the workplace verbal and non-verbal is valuable in the workplace. Lots of company’s spend a lot of money to train their employees on how to communicate. The importance of communication in the workplace is often overlooked. Effective communication is a skill that everyone can develop. Developing these skills will

Introduction: Benzopinacol can be prepared from benzophenone in presence of sun light (photochemically) using isopropanol as the reducing agent in presence of acetic acid. Acetic acid is added to prevent the cleavage of benzopinacol to benzophenone and benzhydrol by the alkali derived from the glass container used for the reaction. Benzopinacol obtained in the first experiment is converted to benzopinacolone by heating under reflux (5 minutes) with glacial acetic acid containing trace amount of iodine

Introduction The purpose of this experiment was to purify acetanilide that was contaminated with relatively small amounts of impurities using recrystallization. The success of recrystallization was dependent on a suitable solvent being chosen and proper recrystallization technique being carried out. The solvent chosen had to have a different polarity than that of the molecule of interest. The technique used was dependent on the solubility of the solvent at higher temperature and the

BS1003 – Organic Chemistry Practical 1 Laboratory Report Name: Tristan Chan Yew Kit, U1640436J (T8) Effects of Dichloromethane(DCM) in Extraction of Caffeine from Tea Leaves Purpose To investigate the ability for Dichloromethane(DCM), a moderately polar organic solvent, to extract aqueous caffeine molecules, originating from Tea Leaves suspended in water. Introduction Caffeine, defined chemically as 1,3,7-trimethylxanthine (C8H10N4O2), is an alkaloid that can be found in tea leaves, coffee and many

Coffee, sweet nectar of the Gods. Always so delicious, so empowering, and once illegal?I'll be telling you some incredible things you never knew about that morning cup of coffee. Like for example, how in it became outlawed in England. when King Charles the second became worried that coffee shops were where people were conspiring against him. In addition to royal paranoia, the brew that we all love has a huge number of amazing facts that you need to hear to believe. Add cream and sugar if needed

Through the extraction process, the mixture was separated into its pure benzocaine and benzoic acid portions. This could be proven by matching the melting points of the substituents obtained at the end of the lab to the average melting points found in several chemistry databases. In other words, the melting points of the purified benzocaine and benzoic acid compounds (93.2˚C and 131˚C, respectively) reflect a similar melting points to the documented 89˚C and 122.41˚C of the pure compounds found in

In the process of performing a synthesis that include and aromatic ring there are several characteristics that need to taken into consideration such as, are there any substituents attached to the aromatic ring and if so, the type of substituent is important. Depending on the substituent that is bonded to the aromatic ring affects the position of additional substituents that are added. The substituents that are present on the aromatic ring can be identified as either as activating groups or deactivating

Results and discussion In this research, a diene (tetraphenylcyclopentadienone) was reacted with three alkyne dienophiles (acetylene dicarboxylate, diphenyl acetylene, and benzyne) to form tetraphenylphtalate, hexaphenylbenzene, and tetraphenylnaphthalene respectively. On the other hand, the diene(anthracene) was reacted with the dienophile(benzyne) to form triptycene. In the first reaction, diene (tetraphenylcyclopentadienone) interacted with the dienophile(acetylene dicarboxylate) to produce

presented in Figure 1. Figure 1: Benzene can only undergo substitution reactions that are called electrophilic aromatic substitution reactions. Given that benzene rings are used commonly in the production of many organic compounds, the capability to make substitutions to benzene is critical. This can be accomplished by the use of Electrophilic Aromatic Substitution (EAS) as Nucleophilic Aromatic Substitution (NAS) is not possible because of the electron-rich benzene ring, which does not have substituents

The anthraquinone dye experiment has the purpose to identify the anthraquinone dyes from unknown mixture by using thin layer chromatography (TLC) of the unknown fraction. An anthraquinone is an aromatic organic compound obtained by the oxidation of anthracene. To separate the compounds in the mixture, column chromatography and thin layer chromatography uses portioning of a sample between a stationary solid phase and a liquid mobile phase. As the stationary phase, they use either silica gel or alumina