mechanism of tert-butylation of phenol with tert-butyl alcohol over H-beta zeolite: An ONIOM study | 作者: Nie‚ XW (Nie‚ Xiaowa)1‚3‚4; Janik‚ MJ (Janik‚ Michael J.)2; Guo‚ XW (Guo‚ Xinwen)1; Liu‚ X (Liu‚ Xin)1; Song‚ CS (Song‚ Chunshan)1‚2‚3‚4 | 来源出版物: CATALYSIS TODAY 卷: 165 期: 1 页: 120-128 DOI: 10.1016/j.cattod.2010.11.070 出版年: MAY 16 2011 | 被引频次: 2 (来自 Web of Science) | 引用的参考文献: 50 [ 查看 Related Records ] 引证关系图 | 摘要: Tert-butylation of phenol with tert-butyl alcohol (TBA)
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anhydride to produce pure paracetamol. The reactions are summarised as shown below: Lab scale manufacture Paracetamol can be easily prepared in the laboratory using phenol. Phenol reacts with sodium nitrate and separate para nitro phenol from outho nitro phenol. Then para nitro phenol is converted into para amino phenol using sodium borohydride and acetylated with acetic
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cups‚ small‚ 2 Sealable‚ zipper-lock plastic bags‚ quart size‚ 6 Measuring spoons‚ teaspoon and half-teaspoon‚ 1 each Water‚ distilled‚ or deionized Phenol red‚ 0.02% aqueous solution 30mL Sodium Bicarbonate (solid)‚ 3 tsp. Calcium Chloride (solid)‚ 6 tsp. Safety Precautions: Calcium chloride is slightly toxic by ingestion. Phenol red is a dye solution and will stain skin and clothing. Avoid contact of all chemicals with skin and eyes. Be careful to mix the chemicals in the amounts
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Table of contents page 1. Periodic table of the elements 3 2. The electrochemical series 4 3. Physical constants 5 4. SI prefixes‚ their symbols and values 5 5. 1H 6. 13C 7. Infrared absorption data 8. 2-amino acids (α-amino acids) 8–9 9. Formulas of some fatty acids 10 NMR data NMR data 5–6 7 7 10. Structural formulas of some important biomolecules 10 11. Acid-base indicators
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Organic Lab I No. 5-6 Separation of a Carboxylic Acid‚ a Phenol‚ and a Neutral Substance (Two-week lab) Reading Assignment 1) Chapter 7 • Introduction: P. 135- first paragraph • Theory and Techniques (p142-145) o Properties of Extraction Solvents o Mixing and Separating the Layers o Drying Agents o Part 1: The Technique of Neutral Liquid/Liquid Extraction The description is for dichloromethane-aqueous
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the acidic compounds are the carboxylic acids and the phenols. The carboxylic acids have the general formula of The functional group‚ is called the carboxyl group (carbonyl + hydroxyl). Further‚ phenols are commonly known carbolic acids. The presence of the hydroxyl groups in the molecules of phenols means that phenols are like alcohols in being able to form strong intermolecular hydrogen bonds. This hydrogen bonding causes phenols to be associated and‚ therefore‚ to have higher boiling
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Peak H value (height equivalent to a theoretical plate) (mm) 230nm 80:20 Phenol 0.0373 Benzophenone 0.0196 Naphthalene 0.0164 235nm 80:20 Phenol 0.0327 Benzophenone 0.0203 Naphthalene 0.0147 260nm 80:20 Phenol 0.0318 Benzophenone 0.0202 Naphthalene 0.0146 Figure 11: table for the height equivalent of the theoretical plates. It can be observed that the H values or height equivalent to a theoretical plate for phenol at the three wavelengths (230‚ 235‚ and 260nm) are all fairly similar‚ they
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bag cold. EVIDENCE to support your claim Sodium Bicarbonate and water make the bag noticeably cold. When you take calcium chloride‚ phenol red‚ and water the bag becomes hot. If you add Calcium chloride and sodium bicarbonate there will be no reaction. If you add Sodium Bicarbonate and Phenol red the bag will become cold. When you take Sodium Bicarbonate‚ Phenol red‚ and water the bag will become cold. Using your stellar reasoning skills‚ what is your conclusion to your claim using your evidence
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properties of the individual substances? Chemical Observation Calcium Chloride Grainy‚ White Sodium Bicarbonate White‚ flour texture Phenol Red Solution The color of Hawaiian punch‚ thin consistency‚ semi- transparent What happens when the substances are mixed together? Observations Calcium Chloride- Foams and heats up when mixed with the phenol red. Turned orange Sodium Bicarbonate- Turned orange‚ dissolved What individual interactions are responsible for the observed changes?
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ring. The substituents being tested are aniline‚ anisole‚ acetamide (acetanilide)‚ and phenol. All four of these groups are either para or ortho activating. Bromination is the reaction that will be carried out. The melting point ranges of the final products will be taken in order to determine their identities and reactivity. It is predicted that substitution order from most to least reactive should be aniline‚ phenol‚ anisole‚ and acetamide. Theory: Regioselectivity and the rate of electrophilic aromatic
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