Unsymmetrical alkene (1-butene) may be converted to Glycol by which of the following reactions options: Hydroboration in presence of hydrogen peroxide and NaOH Hydration in presence of acidic aqueous medium Oxidation with permangante Oxidation with Oxygen in presence of silver catalyst at 250 C and high pressure Ozonolysis in presence of Zinc and acidic medium
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Unsymmetrical
options:
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Hydroboration in presence of hydrogen peroxide and NaOH |
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Hydration in presence of acidic aqueous medium |
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Oxidation with permangante |
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Oxidation with Oxygen in presence of silver catalyst at 250 C and high pressure |
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Ozonolysis in presence of Zinc and acidic medium |
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- Unsymmetrical alkene (1-butene) may be converted to secondary alcohol by which of the following reactions options: Ozonolysis in presence of Zinc and acidic medium Hydroboration in presence of hydrogen peroxide and NaOH Oxidation with Oxygen in presence of silver catalyst at 250 C and high pressure Hydration in presence of acidic aqueous medium Oxidation with permanganteUnsymmetrical alkene (1-butene) may be converted to primary alcohol by which of the following reactions options: Oxidation with Oxygen in presence of silver catalyst at 250 C and high pressure Hydration in presence of acidic aqueous medium Ozonolysis in presence of Zinc and acidic medium Hydroboration in presence of hydrogen peroxide and NaOH Oxidation with permanganteCompound P (C2H4) which is an alkene undergoes reaction with HCl to produce compound Q (C2H5Cl). Reaction of compound Q with benzene in the presence of AlCl3 as catalyst produces compound R. Then, nitration of compound R in the presence ofnH2SO4 produces two compounds, S and T. But when compound R is reacted with a hot acidified solution of alkaline KMnO4 gives compound U. Deduce the structure of compounds P to U.
- Like other electrophiles, carbocations add to alkenes to form new carbocations, which can then undergo substitution or elimination reactions depending on the reaction conditions. With this in mind, consider the following reactions of nerol, a natural product isolated from lemon grass and other plant sources. Treatment of nerol with TsOH forms α-terpineol as the major product, whereas treatment of nerol with chlorosulfonic acid, HSO3Cl, forms a constitutional isomer, α-cyclogeraniol. Write stepwise mechanisms for both processes. Each mechanism involves the addition of an electrophile—a carbocation—to a double bond.Like other electrophiles, carbocations add to alkenes to form new carbocations, which can then undergo substitution or elimination reactions depending on the reaction conditions. With this in mind, consider the following reactions of nerol, a natural product isolated from lemon grass and other plant sources. Treatment of nerol with TsOH forms α-terpineol as the major product, whereas treatment of nerol with chlorosulfonic acid, HSO3Cl, forms a constitutional isomer, αcyclogeraniol. Write stepwise mechanisms for both processes. Each mechanism involves the addition of an electrophile— a carbocation—to a double bond.α-Terpinene, C10H16, is a pleasant-smelling hydrocarbon that has been isolated from oil of marjoram. On hydrogenation over a palladium catalyst, α-terpinene reacts with 2 molar equivalents of H2 to yield a hydrocarbon, C10H20. On ozonolysis, followed by reduction with zinc and acetic acid, α-terpinene yields two products, glyoxal and 6-methyl-2,5- heptanedione. (a) How many degrees of unsaturation does a-terpinene have? (b) How many double bonds and how many rings does it have? (c) Propose a structure for a-terpinene.
- (a) Cyclohexa-1,3-diene can be converted into a tetrasubstituted haloalkane when reacted with bromine in ether. Write a balanced chemical equation for the reaction that occurs and state the expected observation. (b) Compound A and B are alkenes with the same molecular formula C5H10. Compound A is a branched-chain alkene while compound B is a straight-chain alkene. The reaction between compound A with hydrogen bromide produces major product C which is optically active. (i) Draw TWO (2) possible structures for compound B. (ii) Outline the mechanism for the reaction between compound A with hydrogen bromide to form major product C. (iii) Name the product formed when compound A undergoes bromination reaction.Bromine reacts with alkenes in methanol according to the equation: - When this reaction was carried out with 4-tert-butylcyclohexene, only one isomer was formed with the molecular formula C12H23BrO (80% yield). Which of the following is the structure more reasonable for this compound?. Explain your reasoning through acorresponding mechanism.As the molecular weight of alkenes increases, the boiling points also increase. Which ofthe following factors is best associated to this trend? *Dipole interactionGeometric isomerismStructural isomerismSurface areaA radical substitution reaction is primarily observed in the following reactions. Whichreaction is it? *Oxidation of but-2-eneChlorination of butaneBoiling of hex-3-eneCombustion of methaneWhich among the following compounds has the most electronegative carbon in itsstructure? *ButyneBenzeneBenzaldehydeCyclobutane
- Compound A has molecular formula C4H10, and gives two monochlorides, B and C, on photochemical chlorination. Treatment of either of these monochlorides with potassium tert-butoxide gives the same alkene (C4H8) as the product, but B leads to just one isomer of the alkene, D, where C gives D and another isomer of the alkene, E. Treatment of monochlorides B and C with aqueous ethanol gives products F and G, respectively, both of which are of molecular formula C4H10O. What are the names of compounds A-G?An optically active monoterpene (compound A) with molecular formula C10H18O undergoes catalytic hydrogenation to form an optically inactive compound with molecular formula C10H20O (compound B). When compound B is heated with acid, followed by reaction with O3 and then with dimethyl sulfide, one of the products obtained is 4-methylcyclohexanone. Give possible structures for compounds A and B.Hydrocarbon A has the formula C9H12 and absorbs 3 equivalents of H2 to yield B, C9H18, when hydrogenated over a Pd/C catalyst. On treatment of A with aqueous H2SO4 in the presence of mercury(II), two isomeric ketones, C and D, are produced . Oxidation of A with KMnO4 gives a mixture of acetic acid (CH3COOH) and the tricarboxylic acid E. Propose structures for compounds A-D, and write the reactions.