Compound A has the formula C10H16. On catalytic hydrogenation over palladium, it reacts with only one molar equivalent of H2. Compound A also undergoes reaction with ozone, followed by zinc-acetic acid treatment, to yield a symmetrical diketone B (C10H1602). A H2 (1 mole) / Pd 1) O3 *2) Zn/CH3COOH C10H1602 C10H16 Hint: calculate HDI. How many rings does compound A have? [ Select ]

Compound A has the formula C10H16. On catalytic hydrogenation over palladium, it reacts with only one molar equivalent of H2. Compound A also undergoes reaction with ozone, followed by zinc-acetic acid treatment, to yield a symmetrical diketone B (C10H1602). A H2 (1 mole) / Pd 1) O3 *2) Zn/CH3COOH C10H1602 C10H16 Hint: calculate HDI. How many rings does compound A have? [ Select ]

Organic Chemistry

9th Edition

ISBN:9781305080485

Author:John E. McMurry

Publisher:John E. McMurry

Chapter27: Biomolecules: Lipids

Section27.SE: Something Extra

Problem 47AP: Cembrene, C20H32, is a diterpenoid hydrocarbon isolated from pine resin. Cembrene has a UV...

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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.
Benzene, C6H6 undergoes substitution reaction with concentrated nitricacid, HNO3 to produce compound L. The reaction of compound L withbromine, Br2 in the presence of iron tribromide, FeBr3 produced compoundM. Benzene also undergoes Fridel-crafts alkylation reaction withchloroethane, CH3CH2Cl using catalyst N to produce compound P (i) Draw the structural formula of L, M and P (ii) State catalyst N. (iii) Show the formation of electrophile that will be reacted with benzene for theformation of compound P.
Using the normal/primary isomer of C4H10O, treat it with conc.H2SO4 and heat to produce A. Treatment of A with HCl/H2O gives B and with cold KMnO4/ OH- gives C . Give the name and structures of A, B and C Treatment of A with Hot KMnO4/OH- gives D followed by acidification of the mixture to give E. What is D and E ?
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.
Aspirin, or 2-acetoxybenzoic acid, (C9H8O4) is often synthesised from salicylic acid.(i) Sketch and discuss any changes in the number of possible structural conformations ofaspirin relative to those of salicylic acid. (ii) Re-draw the structure predicted to be the lowest energy conformation of aspirin,indicating any expected stabilising and destabilising interactions. Justify your choice.
Three isomeric pentanols with unbranched carbon chains exist. Which of these isomers, upon dehydration at 180C, yields only 1-pentene as a product?
Cembrene, C20H32, is a diterpenoid hydrocarbon isolated from pine resin. Cembrene has a UV absorption at 245 nm, but dihydrocembrene (C20H34), the product of hydrogenation with 1 equivalent of H2, has no UV absorption. On exhaustive hydrogenation, 4 equivalents of H2 react, and octahydrocembrene, C20H40, is produced. On ozonolysis of cembrene, followed by treatment of the ozonide with zinc, four carbonylcontaining products are obtained: Propose a structure for cembrene that is consistent with its formation from geranylgeranyl diphosphate.
Amines are converted into alkenes by a two-step process called Hofmann elimination. SN2 reaction of the amine with an excess of CH3I in the first step yields an intermediate that undergoes E2 reaction when treated with silver oxide as base. Pentylamine, for example, yields 1-pentene. Propose a structure for the intermediate, and explain why it readily undergoes elimination.
Chhloropropane + sodium ethoxide in the presence of ethanol will yield what products (SN2 reaction). Show the configuration of the product as well as the structural formula
Compound A (C7H11Br) is treated with magnesium in ether to give B (C7H11MgBr) which reacts violently with D2O to give 1-methylcyclohexene with a deuterium atom on the methyl group (C). Reaction of B with acetone (Ch3COCH3) followed by hydrolysis gives D (C10H18O). Heating D with concentrated H2SO4 gives E (C10H16), which reacts with 2 equivalents of Br2 to give F (C10H16Br4). E undergoes hydrogenation with excess H2 and Pt catalyst to give 2-methylpropylcyclohexane. Determine the structures of compounds A through F, and show your reasoning throughout.
1. Compound A, C9H12, absorbs 3 equivalents of H2 on catalytic hydrogenation over palladium catalyst to give B, C9H18. On the treatment with acidic KMnO4, compound A gives among other things, a ketone that was identified as cyclohexanone. On reaction with NaNH2 in NH3, followed by addition of iodomethane, compound A gives a new hydrocarbon C, C10H14. What are the structures of A , B and C?
Compound A whose molecular formula is C9H11ClO, is found to be aromatic, and on vigorous oxidation with hot, concentrated, basic potassium permanganate followed by acidification, a new aromatic, compound B with the molecular formula of C7H5ClO2 is formed. On treatment with bromine and a ferric bromide catalyst, compound B produces ONLY 2 monobrominated derivatives, compounds C and D, each having the molecular formula C7H4BrClO2. On treatment with sodium metal, compound A produces bubbles of hydrogen gas. Controlled oxidation of compound A with PCC first gives compound E, with formula C9H9ClO. Compound E produces a silver mirror with Tollen’s reagent. Mild oxidation of compound E by chromic acid produces compound F, with the molecular formula C9H9ClO2 which turns blue litmus red. When compound A is heated with concentrated sulfuric acid, a single compound G, whose molecular formula is C9H9Cl, is produced. On ozonolysis followed by reaction with dimethyl sulfide, compound G gives…