Rep Two stereoisomers of 1-bromo-4-methylcyclohexane are formed when trans 4-methylcyclohexanol reacts with hydrogen bromide. Write the structural formula of the two stereoisomers of 1-bromo-4-methylcyclohexane. draw structure... cis stereoisomer draw structure.. trans stereoisomer Next> 9 of 11
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- Build a model of methylcyclohexane, and use the model to complete the following Newmanprojections of methylcyclohexane in the chair conformation: a. When the methyl group is in an axial or equatorial (circle one) position, the molecule is inits lowest potential energy conformation. b. Label one Newman projection above anti and the other gauche to describe the relationshipbetween the methyl group and C3 of the ring. c. In general, which is a lower PE conformation, anti or gauche? d. Explain how your answer to b and c provide an explanation for why it is more favorable fora large group to be in an equatorial than an axial position.(a) A compound known to be a substituted cyclohexanone derivative has lamda max of 235 nm. Could this compound be a conjugated dienone? explain (b) (i)For this compound, how many nm must be accounted for by substituents? (ii) What are the substituents and the points of substitution that may occur having accounted for the 20nm?A chemist allows some pure (2S,3R)-3-bromo-2,3-diphenylpentane to react with a solution of sodium ethoxide(NaOCH2CH3) in ethanol. The products are two alkenes: A (cis-trans mixture) and B, a single pure isomer. Under thesame conditions, the reaction of (2S,3S)-3-bromo-2,3-diphenylpentane gives two alkenes, A (cis-trans mixture) and C.Upon catalytic hydrogenation, all three of these alkenes (A, B, and C) give 2,3-diphenylpentane. Determine the structuresof A, B, and C; give equations for their formation; and explain the stereospecificity of these reactions
- Alcohols can be converted to alkyl chlorides using SOCl2 with complete inversion of stereochemistry. Using curved arrows draw the stepwise mechanism for chlorination of an alcohol. Be sure to include lone pairs necessary to the mechanism steps and any non-zero formal charges.Diels–Alder reaction of a monosubstituted diene (such as CH2=CH–CH=CHOCH3) with a monosubstituted dienophile (such as CH2=CHCHO)gives a mixture of products, but the 1,2-disubstituted product oftenpredominates. Draw the resonance hybrid for each reactant, and use thecharge distribution of the hybrids to explain why the 1,2-disubstitutedproduct is the major product.Draw all stereoisomers formed by monochlorination of the cis andtrans isomers of 1,2-dimethylcyclobutane drawn below.
- Give major products for 1,2-/1,4-additions (A) Diels-Alder (B-D) cycloadditions [2+2] cycloadditions , and Retro-Diels-Alder (E) cycloaddition. Illustrate the regiochemistry and stereochemistry (me so, enatiomer., exo or Endo) for cycloadditions B-D?What organic product is formed when 1‑methylcyclopentene is treated with NMMO in the presence of H2O and a catalytic amound of OsO4? Clearly show stereochemistry by drawing a wedge and dashed bond for each chiral carbon. Only draw one stereoisomer if more than one can be formed.A)Circle all of the stereo centers in MDMA. B) assign the absolute stereochemistry (R or S) for each stereo center