S-20 Week 1 Alkenes: Isomers and Nomenclature 1. There are 6 unique alkene isomers of the hydrocarbon C5H10. Draw each of these isomers‚ and provide a systematic name for each. 1-pentene (E)-2-pentene (Z)-2-pentene 2-methyl-1-butene 2-methyl-2-butene 3-methyl-1-butene 2. For the three alkenes above which are various isomers of pentene‚ rank them in order of stability. Explain your ranking. most stable (more subst. double bond) less stable (cis alkene is slightly less
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reaction occurs when a leaving group‚ which consists of a weak base‚ leaves an organic compound‚ leaving an intermediate carbocation. In the second step‚ a carbon on the organic compound is deprotonated by a Lewis base‚ resulting in the formation of an alkene. The dehydration reactions of 1- and 2-Butanol with sulfuric acid occur through an E1 mechanism‚ so they follow the steps previously
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equation. [3 marks] d) The quality assurance manager of the production plant found out that the method in (c) is not very efficient and has decided to look for an alternative pathway to produce nhexane. He suggested on forming an intermediate step of alkene‚ which later undergoes reduction reaction to form n-butane. Propose two reaction pathways to produce n-butane‚ writing the complete chemical reaction equations. [10 marks] e) n-hexane is a type of alkane. List three physical properties of alkane.
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Polymerization Chain Propagation: Cossee-Arlman Mechanism = good basic mechanism. Cossee et al.‚ J. Catal.‚ 1964‚ 3‚ 80 & 99. 1‚2-insertion alkene coordination R [M] R [M] [M] R CH2 C H2 [M] R Green-Rooney Mechanism involving metathesis-like step = totally wrong ! CHP CH2P [M] α-elimination [M] H CHP [M] H PHC H [M] R reductive elimination PH2C [M] R alkene coordination R metathesislike process This Mechanism DOES NOT Occur Proposed by Green‚ Rooney et al.‚ J. Chem. Soc.‚ Chem
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be gases as‚ propane‚ they can be liquids‚ for example‚ benzene‚ or they can be low-melting solids and waxes‚ for example‚ polystyrene. There are four classifications of hydrocarbons; saturated hydrocarbons or alkanes‚ unsaturated hydrocarbons or alkenes and alkynes‚ cycloalkanes‚ and aromatic hydrocarbons or arenes. The different between these groups is in the bond types between the carbons. Objective: 1- To observe the flame of cyclohexane and cyclohexene. 2- To observe the effect of adding sulphuric
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Abstract:The Wittig Reaction is a nucleophilic addition in which an alkene is formed as a product. Both the E and Z isomers of the alkene result. Substituents on the aromatic aldehyde affect the E/Z ratio of products that form. In this experiment‚ a nitro group was used as the substituent in the ortho‚ meta and para positions‚ with benzaldehyde as the control. Each of the four aldehydes reacted with (carbethoxymethylene) triphenylphosphorane to produce ethyl cinnamate‚ ethyl-3-(2-nitrophenyl)acrylate
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Energy 1. Living organisms make compounds which are important sources of energy * outline the role of photosynthesis in transforming light energy to chemical energy and recall the raw materials for this processco2+h2oglucose+o2+h2othis is then stored as carbs and starch | * outline the role of the production of high energy carbohydrates from carbon dioxide as the important step in the stabilisation of the sun’s energy in a form that can be used by animals as well as plants harnesses
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Alkanes This is the correct chemical term for compounds known as paraffins. They are considered the simplest organic compounds and are a family of chain hydrocarbons having the general formula C2H2n+2. All of the bonds are single bonds (-C-H-‚ and -C-C-). The chains can be straight or branched. The smaller members (less than 4 carbons) are gases‚ while larger ones (five to seventeen carbons) are liquids. Beyond seventeen carbons the alkanes are waxy solids. Structure: The simplest saturated acyclic
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functional group would be present in solution? Potassium Magante is K2MnO4 whereas the permanganate is KMnO4‚ in the second one the Mn as a higher oxidation state of +7‚ the other one just +6. It would show that a double bond is present. (It oxides the alkene to a diol‚ which changes the oxidation state of the Mn changing it’s colour) Original post by GyasiW) First of all I would like to know the differences in formulae between Potassium Mangante and Potassium Permanganate. Secondly‚ In a test between
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to test for the presence of alcohol. The color changed to brown‚ indicating the presence of the desired product. A drop of the product was also tested with IR spectroscopy. There were peaks at both 1600cm-1 and 3300cm-1 which are indicative of an alkene. 1600cm-1 correlates with the C=C stretch‚ while the 3300cm-1 signal correlates
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