synthesis of 2 methyl 2 butene lab report

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depict all of the stereoisomers that result when e-hex-2 Depict all of the stereoisomers that result when How do you synthesized 3-bromo-3-methyl-2-butanol.

proses pembuatan 2 methyl 2 butene

Of the other compound, we had 10 mL 1-butanol, or 8.095 g, because it has a density of 0.8653 g/mL. Therefore, we have .10921 moles of this, because its molar mass is 74.121.


2 methyl 2 butene biodegradable

properties of molecule: 2-Methyl-2-butene Properties Molecule 2-Methyl-2-butene 2-Methyl-2-buten 2 ...


2-methyl-2-butene (CH 3) 2 C=CHCH 3 B.

Assuming that the reaction of the methanesulfonate with NaSCH2CH3proceeds with 100% inversion of configuration, we conclude that the maximum rotation of sec-butyl ethyl sulfide is the value given in the statement of part (b), that is, 25°. Since the sulfide produced in part(c) has a rotation of 23°, it is 92% optically pure. It is reasonable to assume that the loss of optical purity occurred in the conversion of the alcohol to the bromide, rather than in the re-

Br2 NaCNCH3CH2OHEthyl alcohol BrCH2CH2Br1,2-Dibromoethane

(d)The conversion of 2-butanol to sec-butyl methanesulfonate does not involve any of the bonds to the stereogenic center, and so it must proceed with 100% retention of configuration.

HBr1-Propanol CH3CH2CH2OH Propene

Mix 11.1 g NaBr + 10 mL H2O + 10 mL 1-butanol + 10 mL HCl in 100 mL RB flask; mix well while cooling in ice (must be in ice when 10 mL HCl is added), set up apparatus for reflux.

Potassium 2,2-dimethylpropoxide (CH3)3CCH2OK Bromoethane

8.37(a)Tertiary alkyl halides undergo nucleophilic substitution only by way of carbocations: SN1 is the most likely mechanism for solvolysis of the 2-halo-2-methylbutanes.

H3C OH trans-2-Methylcyclopentyl p-toluenesulfonate

with PBr3. We know the absolute configuration of ( )-2-butanol (S) from the statement of the problem and the configuration of ( )-sec-butyl ethyl sulfide (R) from part (b). We are told that the sulfide formed from ( )-2-butanol via the bromide has a positive rotation. It must therefore have the opposite configuration of the product in part (b).

Formation of 2-chloro-2-methylbutane from 2-methyl-2-butanol:

Hydroboration–oxidation converts 1-methylcyclopentene to the desired alcohol by anti- Markovnikov syn hydration of the double bond. The resulting alcohol is then converted to its p-toluenesulfonate ester and treated with acetate ion as in part (a) to give cis-2-methylcyclopentyl acetate.