Concept explainers
Interpretation:
Compound A, C10H18O, when warmed with dilute H2SO4 at 50oC yields a mixture of two
Concept introduction:
Alcohols gets dehydrated to yield alkenes when warmed with dilute H2SO4 at 50oC. Symmetrical alkenes upon ozonolysis followed by reduction with zinc in acetic acid will yield only a single product. If the doubly bonded carbons are attached to two substituents then upon ozonolysis a
To identify:
The compounds A and B based on the reactions given and to explain the reactions.
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Chapter 8 Solutions
Organic Chemistry
- 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 H2 SO4 gives E (C10 H16), which decolorizes two equivalents of Br2 to give F (C10H16 Br4). E undergoes hydrogenation with excess H2 and a Pt catalyst to give isobutylcyclohexane. Determine the structures of compounds A through F, and show your reasoning throughout.arrow_forwardCompound A has molecular formula C7H15B.. Treatment of compound A with sodium ethoxide yields only one elimination product (compound B) and no substitution products. When compound B is treated with dilute sulfuric acid, compound C is obtained, which has molecular formula C7H160. Draw the structures of compounds A, B, and C.arrow_forwardCompound X has molecular formula C5H10. In the presence of a metal catalyst, compound X reacts with one equivalent of molecular hydrogen to yield 2-methylbutane. (1) Suggest three possible structures for compound X. (2) Hydroboration-oxidation of compound X yields a product with no chirality centers. Identify the structure of compound X.arrow_forward
- Compound A, C9H16 reacts with 1 molar equivalent(s) of hydrogen on catalytic hydrogenation. A undergoes reaction with ozone, followed by Zn treatment. What is the structure for A?arrow_forwardCompound A has the formula C9H19Cl. B is a C9H19Br compound.A and B undergo base-promoted E2 elimination to give the same alkene C as the major product as well as different minor products.C reacts with one molar equivalent of hydrogen in the presence of a palladium catalyst to form 2,6-dimethylheptane.Addition of HCl to C yields A as the major product.Propose structures for A and B.arrow_forwardCompound A of molecular formula C8H₁4 is reduced by sodium in liquid ammonia to give compound of molecular formula C8H16. product (Y). Both A and B undergo hydrogenation in the presence of a platinum catalyst to give 2,5- dimethylhexane. Ozonolysis of B with an oxidative workup produces a carboxylic acid of molecular formula C4H8O2. Reaction of B with a peroxyacid gives a chiral C8H₁40 product, but reaction with bromine gives an achiral C8H₁4Br2 product. What are the identities of A and B? 14 A is 2,5-dimethyl-3-hexyne; B is cis-2,5-dimethyl-3-hexene A is 2,5-dimethyl-3-hexyne; B is trans-2,5-dimethyl-3-hexene A is 2,5-dimethyl-1,5-hexadiene; B is 2,5-dimethyl-3-hexyne A is 2,5-dimethyl-2,4-hexadiene; B is cis-2,5-dimethyl-3-hexenearrow_forward
- (S)-2-butanol reacts with potassium dichromate (K2CrO4) in aqueous sulfuric acid to give A(C4H3O). Treatment of A with ethylmagnesium bromide in anhydrous ether gives B(C,H140). Draw the structure of B.arrow_forwardAn 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.arrow_forwardCompound A (C7H11Br) is treated with magnesium in ether to give B (C7H11MgBr), which reacts violently with D2O togive 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 decolorizestwo equivalents of Br2 to give F (C10H16Br4). E undergoes hydrogenation with excess H2 and a Pt catalyst to giveisobutylcyclohexane. Determine the structures of compounds A through F, and show your reasoning throughoutarrow_forward
- Compound J, C16H16Br2, is optically active. On treatment with strong base, compounds K and L (each C16H14) are formed; K and L each absorb only 2 equivalents of hydrogen when reduced over a Pd/C catalyst. Compound K reacts with ozone to give phenylacetic acid (C6H5CH2COOH), while similar treatment of L gives 2 products. One product, M, is an aldehyde with formula C7H6O; the other product is glyoxal (CHO)2. Draw the structure of compound L.arrow_forwardCompound A, C9H₁6 reacts with 1 molar equivalent(s) of hydrogen upon catalytic hydrogenation. A undergoes reaction with ozone, followed by Zn treatment, to give: CHỊCHỊCH CH3CCH₂CH₂CH₂CH₂CH₂CCH3 || Propose a structure for A.arrow_forwardAn achiral hydrocarbon A of molecular formula C7H12 reacts with two equivalents of H2 in the presence of Pd-C to form CH3CH2CH2CH2CH(CH3)2. One oxidative cleavage product formed by the treatment of A with O3 is CH3COOH. Reaction of A with H2 and Lindlar catalyst forms B, and reaction of A with Na, NH3 forms C. Identify compounds A, B, and C. Be sure to answer all parts.arrow_forward
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