observed even after extending the reaction time. These result implies that the conversion of product strongly dependent of reaction time. With the promising results in hand‚ we next examine the catalytic efficiency of complex 2 for a wide range of aromatic‚ heterocyclic‚ cyclic and aliphatic ketones. To compare the results‚ all the reactions were carried out under identical conditions. The alcoholic products were analysed by GC-MS and 1H-NMR (entries 2‚ 15 and 16) after doing the required workup (Figs
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formula (b) Skeletal formula 2. Draw all the possible isomers of hexane C6H14 and give the name of each. 3. Draw the structural formulae for each of the following alkanes: (a) 2‚2- dimethylbutane (b) 2-methyl-4-ethylhexane 4. A student gave the name of a hydrocarbon as 2-methyl-2-ethylbutane. Give the correct name. 5. (a) Draw the structural formula of the most highly branched isomer of octane (b) Suggest why this isomer combusts more smoothly than the straight-chain isomer
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years all over the world to treat the same symptoms that we use aspirin to treat. The bark from willow trees‚ along with a few other trees‚ produces an anti-inflammatory agent called salicin. Salicin is an aromatic alcohol‚ this is indicated by the OH group of the benzene ring (benzene is aromatic hydrocarbon‚ which is an unsaturated cyclic hydrocarbon). Benzene and the OH groups are substituents as shown in the diagram. By the
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Properties and Reactions of Hydrocarbons Abstract Introduction Hydrocarbons are organic materials that contain only carbon and hydrogen atoms‚ these molecules can be saturated or unsaturated and acyclic‚ cyclic‚ or aromatic. In this experiment we used a variety of methods to examine the physical and chemical properties of hydrocarbons. The first experiment we tested a variety of solvents to see if they dissolved our alkane (Decalin). One would expect that non-polar solvents will dissolve
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Vol. 21 Summer 2005 Newborn Screening in the 21st Century From the Editors and Authors: Since our last Update on Newborn Screening in 1998‚ there has been significant expansion of newborn screening programs in various regions of the country‚ mostly to include metabolic disorders identifiable by tandem mass spectrometry. States in our region are just now starting to expand their programs. The Summer 2005 Genetic Drift provides an update on newborn dried blood spot screening (NBS). Specifically
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example of an i. Alkane Butane C4H10 ii. Alkene Ethene C2H4 iii. Cycloalkane Cyclohexane C6H12 iv. Alcohol Ethanol C2H5OH v. Ether Methoxy methane CH3OCH3 9. What does an aromatic compound contain? Note all other compounds are aliphatic A benzene ring 10. Give examples of all 3 types of structural isomerism i. Chain
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shaking | No colour change with the addition of aqueous KMnO4 | Presence of Alkane | 2ml of cyclohexene + 2 dropsKMnO4 + shaking | Colour changes to colourless with brown precipitate | Presence of Alkene | Reaction with potassium permanganate and aromatic compound Test | Observation | Inference | 1ml of
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(INTERNAL REPORT) CENTERPLASTICS COMPOUND & ADDITIVES Feb.2011 - M.S. Laura Fontana - Centerplastics Enterprise‚ Ltd Eastern Industrial Road‚ zip. 516127‚ Shiwan Town‚ Boluo Area‚ Huizhou‚ DongGuan‚ GuangDong‚ P.R.China PPH Chapter 1 - Introduction Approximately 25 potential devulcanization technology researchers and developers were identified throughout the world‚ however‚ only a very small number of devulcanization systems are now operating. These are primarily small-capacity systems
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the structure had to add up to 148. ATR-IR suggested the presence of an aromatic ring‚ alkene group and carbonyl group. CNMR showed the presence of an aromatic ring‚ carbonyl group and a methyl group. HNMR showed the presence of an aromatic ring‚ alkene group and carbonyl. Using the rule of 13 and the adjustment for oxygen‚ the predicted structure of the anise oil was C10H12O with 5 degrees of unsaturation. Since the aromatic ring is 4 degrees of unsaturation by itself‚ the last degree of unsaturation
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P H A R M A C EU TIC A L S O LU TIO N S PA R T I Pharmaceutical Technology II PHAR 2332 LEARN IN G O BJECTIVES At the end of the lecture‚ the students should be able to; 1. Define pharmaceutical solutions. 2. Discuss the advantages & drawbacks of pharmaceutical solutions as dosage form. 3. Explain the formulation components in pharmaceutical solutions. 4. Describe types of pharmaceutical solutions. Solutions are: Dosage forms prepared by dissolving the active ingredient(s) in an aqueous or
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