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- is steric hinderance not an issue here? why when reacting with KOC(CH3)3 does it yield 2-isopropyl-1-pentene and it yields 2,3-dimethyl-2hexene here?For each reaction below, provide the structural formula for the reactants and the predicted products. Indicate which mechanism the reaction will follow and use curved arrow formalism to illustrate the predicted reaction mechanism. t-butylalcohol + NaBr ?In the following cases rearrange the compounds as directed : (Delhi 2010)(i) In an increasing order of basic strength :C6H5NH2, C6H5 N(CH3)2, (C2H5)2NH and CH3NH2(ii) In a decreasing order of basic strength :Aniline, p-nitroaniline and p-toluidine(iii) In an increasing order of pKb values :C2H5NH2, C6H5 NHCH3, (C2H5)2NH and C6H5NH2
- When 1, 3-butadiene reacts with one mole of HBr, two isolable products result. Propose a mechanism to explain this.The following sequence of steps (R)- 2-octanol to (S)- 2-octanol. Propose structural formulas for intermediates A y B, specify the absolute configuration of each, and account for the inversion of configuration in this sequenceI’m currently trying to write a lab report for the synthesis of dimolybdenum tetraacetate [Mo2(O2CCH3)4] from the reaction of molybdenum hexacarbonyl, Mo(CO)6 in glacial acetic acid and acetic anhydride under a nitrogen atmosphere, involving the difficult formation of a quadruple bond and requires high heat and long reaction time (approximately 20 hours). But these are the question I’m stumped on: 1. Why need the reaction be done under nitrogen? We also added dichlorobenzene and hexanes during the reaction. 2. Explain the purpose of dichlorobenzene and hexanes. 3. Why does the reaction take 20 hrs?
- The following carbocation is an intermediate in the electrophilic addition reaction of HCl with two different alkenes. Identify both, and tell which C-H bonds in the carbocation are aligned for hyperconjugation with the vacant p orbital on the positively charged carbon.Dichlorocarbene can be generated by heating sodium trichloroacetate. Propose a mechanism for the reaction, and use curved arrows to indicate the movement of electrons in each step. What relationship does your mechanism bear to the base-induced elimination of HC1 from chloroform?It is not uncommon for organic chemists to prepare acetals by an exchange-type process known as transacetalization. Predict the product(s) and show the mechanism for the transacetalization reactions below.
- Use your general knowledge of alkene chemistry to suggest a mechanism for the following reaction.Hydration of 1,3-dimethylcyclopentene gives what major and what minor products?The reaction of 2,2-dimethyl-1-propanol [(CH3)3CCH2OH], also known by the common name neopentyl alcohol, with HBr is very slow and gives 2-bromo-2-methylbutane as the major product.Give a mechanistic explanation for these observations.