3-Ethylpentane, structure

On being heated with a solution of sodium ethoxide in ethanol compound A (CyHisBr) yielded a mixture of two alkenes B and C each having the molecular formula C7H14 Catalytic hydrogenation of the major isomer B or the minor isomer C gave only 3 ethylpentane Suggest structures for compounds A B and C consistent with these observations... 

Although the synthetic yields of hydrocarbon products obtained from the reduction of tertiary alkyl alcohols are frequently quite high, studies show that the reaction pathways taken by the reactants are not always as direct or straightforward as might be suggested by the structural relationships between reactants and products. For example, preparative-scale treatment of a dichloromethane solution of 3-ethylpentan-3-ol and triphenylsilane (1.2 equivalents) with excess trifluo-roacetic acid (1.5 M) at room temperature for 24 hours gives 3-ethylpentane in 78% yield (Eq. 14).127 Under these reaction conditions, the alcohol rapidly... 

Problem 4.32 Give topological structural formulas for (a) propane, (h) butane, (c) isobutane, (d) 2,2-dimethylpropane, (e) 2,3-dimethylbutane, (/), 3-ethylpentane, (g) l-chloro-3-methylbutane, (h) 2,3-dichloro-2-methylpentane, (/) 2-chloro-2,4,4-trimethylpentane. -4... 

Problem 4.40 (a) Deduce structural formulas and give lUPAC names for the nine isomers of C,H,. (b) Why is 2-ethylpentane not among the nine ... 

Calculate CH bond dissociation energies in propene and in toluene, leading to allyl and benzyl radicals, respectively. (The energy of hydrogen atom is given at right.) Is bond dissociation easier or more difficult in these systems relative to bond dissociation in 3-ethylpentane (methyl CH) Examine spin density surfaces for allyl and benzyl radicals. Draw Lewis structures that account for the electron distribution in each radical. Does spin delocalization appear to stabilize radicals in the same way charge delocalization stabilizes ions ... 

A typical temperature—pressure ignition diagram is shown in Fig. 8 for mixtures of 3-ethylpentane and oxygen in the molar ratio 1 2. The low temperature region of the diagram which is associated with the propagation of multiple cool flames shows fine structure , i.e. there are several minima and maxima in the value of the initial pressure required for... 

Draw the structure of an alkyne that can be converted into 3-ethylpentane upon hydrogenation. Provide a systematic name for this compound. 

Write the structure of the major organic product of the reaction of (a) 2-bromo-2-methylbutane with water in acetone (b) 3-chloro-3-ethylpentane with NaOCH3 in CH3OH. 

The dehydrobromination of 3-bromo-3-ethylpentane gives a single product, but the dehydrobromina-tion of 2-bromo-2-methylbutane gives two products. What are the structures of the products for both reactions ... 

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