Grignard Synthesis of Triphenylmethanol Aim The aim of this experiment was to prepared Grignard reagent (phenylmagnesium bromide) from bromobenzene and magnesium‚ to use the reagent prepared to synthesise a tertiary alcohol (triphenylmethanol) by reacting reagent and ester (methyl benzoate)‚ and the product formed is analyse by infrared spectroscopy (IR)‚ melting point‚ thin layer chromatography (TLC)‚ gas chromatography mass spectrum (GCMS) and finally Nuclear Magnetic Resonance spectroscopy. Introduction
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is to learn to make Grignard reagents. The reactions of the Grignard reagents with ketones form tertiary alcohols. These reagents are highly air- and moisture-sensitive materials. We will observe the formation of the Grignard reagents‚ which magnesium metal is transformed into organometallic salts. Experimental Procedure: Our experiment was as followed as in our text “Microscale Organic Laboratory” by Mayo from pages 275-283. The following modifications were made: We performed the experiment
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1 a The diagram shows the parts of a hydrogen atom. [pic] Use words from the list to label the diagram. electron group nucleus symbol (2) b Hydrogen can be used as a clean fuel for cars. i When hydrogen burns in air‚ it reacts with another element. Complete the word equation for this reaction. hydrogen + ................... → water (1) ii Suggest one reason why hydrogen is called a clean fuel. (1)
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this vitamin with tables 8.2 and 8.3 the daily value listed on the vitamin label meets the daily value on the tables. There were a few that have a lower percentage such as Vitamin A 3‚500 IU‚ K 10mcg‚ Biotin 15mcg‚ Calcium 108 mg‚ Phosphorus 50 mg‚ Magnesium 40 mg‚ Manganese 1 mg‚ Chromium 20 mcg‚ and Molybdenum 20 mcg. Because my diet is not filled with vitamin and mineral rich foods‚ taking a multivitamin helps me get the right amounts of vitamins that I need daily. And because the water soluble
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help our bodies to maintain its daily functions. Iron‚ for an example is a very important mineral. This particular mineral is needed in the body because this would put us at risk of having anemia. Other minerals sources are calcium‚ phosphorus‚ and magnesium‚ which are needed for the bones. There are other minerals such as fluoride‚ which is important for the teeth as well as the bones. Then there is iodine‚ which is needed for the synthesis of the thyroid hormones. The other sources of minerals are
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guess paper 1. Express the rate of following reaction in terms of disappearance of hydrogen in the reaction. 3H2(g) + N2(g) 2NH3(g) 2. What is peptisation? 3. Write Reimer Tiemann reaction. 4. Why is CO stronger ligand that Cl-. 5. Write structure of 2-(2-Bromophenyl)butane. 6. Complete the reaction C6H6+R COCl 7. Why pentahalides more covalent than trihalides? 8. What is difference between nucleoside and nucleotide? 9. Explain the following- (a) Gattermann Koch
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Limiting Reagents and Percentage Yield Worksheet 1. Consider the reaction I2O5(g) + 5 CO(g) -------> 5 CO2(g) + I2(g) a) 80.0 grams of iodine(V) oxide‚ I2O5‚ reacts with 28.0 grams of carbon monoxide‚ CO. Determine the mass of iodine I2‚ which could be produced? 80 g I2O5 1 mol I2O5 1 mol I2 1 333.8 g I2O5 1 mol I2O5 28 g CO 1 mol CO 1 mol I2 253.8 g I2 1 28 g CO 5 mol CO 1 mol I2 b) If‚ in the above situation‚ only 0.160 moles‚ of iodine‚ I2 was produced
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With the development of scientific management‚ technology‚ and productive power‚ the products concerning the metal Magnesium have been developed in a diversified way involving Mg particle‚ Mg alloys‚ Mg powder‚ Mg ingot‚ Mg stick‚ Mg sacrificial anode and high performance sacrificial anode etc. The metal Mg‚ 2/3 density of the metal Aluminum‚ is one of the lightest metals. The potential application of the metal Mg is of great importance especially under today’s situation that energy has been greatly
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Chemical Properties: 1. All of the alkaline earth metals form an oxide (rust) on their surface at room temperature (except for Beryllium). 2. All of the alkaline earth metals (except Beryllium) reduce water and dilute acids to hydrogen. 3. Magnesium can reduce‚ and burn in‚ carbon dioxide. https://www.youtube.com/watch?v=_xCbal2YyaE https://www.youtube.com/watch?v=FofPjj7v414 burning magneseum youtube.com/watch?v=_xCbal2YyaE
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BUILDING DEFECTS PART 1 • Identify common building defects • Identify the source • Provide pictures‚ diagrams and sketches • Suggest remedial action • Show details that would have avoided the defect PART 2 Generate a scheme for planned maintenance and provide a building checklist to ensure all necessary maintenance is carried out on a regular basis. INTRODUCTION In this project we will be looking at many different kinds of building defects that would be commonly seen in the construction
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