When 2,2-dimethylbutane is subjected to free-radical chlorination, ——— distant monochlorinated products are possible, and ——— of these products contain (s) asymmetric carbon atom.
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Q: H3C CH3 H3C. CH3 CH3 Br H3C Br
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- What is the molecular model for cis-1,3-dichlorocyclohexane and discuss its most stable conformation and the 1,3-diaxial interaction.This is an isomer of C4H10O, and it’s not an alcohol. What could the structure be, and what are the degrees of unsaturation? Which peaks would correspond with which carbons?1,2,3,4,5-Pentafluoro-6-nitrobenzene reacts readily with sodium methoxide in methanol at room temperature to yield two major products, each having the molecular formula C7H3F4NO3. Suggest reasonable structures for these two compounds.
- Predict the products for the hydrohalogenation reaction of 1-methyl-1,3-cyclohexadiene with 1 equivalent of HBr in thermodynamic conditions.When exactly 1 mole of methane is mixed with exactly 1 mole of chlorine and light is shone on the mixture, a chlorination reaction occurs. The products are found to contain substantial amounts of di-, tri-, and tetrachloromethane, as well as unreacted methane. Explain how a mixture is formed from this stoichiometric mixture of reactants, and propose mechanisms for the formation of these compounds from chloromethane.Determine all of the products obtained from the addition of HCl to the 1,3-diene. Once determined, draw a mechanism that accounts for the formation of every product. Then, Identify and account for the formation of the major adduct/or adducts under these conditions assuming that the reaction is conducted under thermodynamic conditions.
- trans-Cyclooctene has been resolved, and its enantiomers are stable at room temperature. trans-Cyclononene has also been resolved, but it racemizes with a half-life of 4 min at 0°C. How can racemization of this cycloalkene take place without breaking any bonds? Why does trans-cyclononene racemize under these conditions but trans-cyclooctene does not? You will find it especially helpful to examine the molecular models of these cycloalkenes.Methyl acrylate (H2C=CHCO2CH3) reacts with 1,3-cyclopentadiene to give a mixture of two products. Write structural formulas for both and predict which one predominates.The Diels–Alder reaction between butadiene and dimethyl maleate yields a ring structure, as shown in the product. Complete the structure by drawing any missing bonds and indicating the stereochemistry of the new stereocenters.
- Define about Sigmatropic Rearrangements ?Describe the characteristic infrared absorption frequencies that would allow you to distinguish between the following pairs of compounds. (a) 2,3-dimethylbut-2-ene and 2,3-dimethylbut-1-ene (b) cyclohexa-1,3-diene and cyclohexa-1,4-dieneThe NMR spectrum of bromocyclohexane indicates a low field signal (1H) at δ 4.16. To room temperature, this signal is a singlet, but at -75 ° C it separates into two peaks of unequal area (but totaling one proton): δ 3.97 and δ 4.64, in ratio 4.6: 1.0. How do you explain the doubling in two peaks? According to the generalization of the previous problem, what conformation of the molecule predominates (at -75 ° C)? What percentage of the molecules does it correspond to? Solve all parts otherwise down vote and hand written solution