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Device a scheme for the synthesis of n-b...

Device a scheme for the synthesis of n-butane using `CH_3I`
as the only carbon source. Can you employ the reactions in your
scheme to synthesis propane in fairly pure state ? Explain

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To synthesize n-butane using CH₃I as the only carbon source, we can employ the following step-by-step scheme: ### Step 1: Formation of Ethyl Chloride 1. Start with CH₃I (methyl iodide). 2. React CH₃I with chlorine (Cl₂) in the presence of sunlight to form ethyl chloride (C₂H₅Cl). - Reaction: \[ CH_3I + Cl_2 \xrightarrow{h\nu} C_2H_5Cl + HI ...
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Alexander Williamson prepared diethyl by a simple method, now called as Williamson's ether synthesis . In this method, an alkyl halide is treated with sodium alkoxide prepared from sodium and alcohol. This reaction is used in the synthesis of symmetrical and unsymmetrical ethers. It may be noted taht for preparing unsymmetrical ethers, the halide used should preferably be primary because secondary and tertiary alkyl halides may form alkenes as major product due to elimination process. CH_(3)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C)-Br+underset("Sodium ethoxide")(Na^(+)O^(-)-C_(2)H_(5))rarrunderset("2-methylpropene")(CH_(3)-overset(CH_(3))overset(|)(C)=CH_(2))+C_(2)H_(5)OH+NaBr Aryl ethers or phenolic ethers can be prepared by using sodium phenoxide and alkyl halides. However, aryl halides and sodium alkoxide cannot be used for preparing phenolic ethers because aryl halides are less reactive towards nucleophilic substitution reaction Methyl tertiary butyl ether (MTBE) is added in gasoline to improve its octane number . CH_(3)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C)-O-CH_(3) Which of the following is the best method for synthesis of the above ether ?

Alexander Williamson prepared diethyl by a simple method, now called as Williamson's ether synthesis . In this method, an alkyl halide is treated with sodium alkoxide prepared from sodium and alcohol. This reaction is used in the synthesis of symmetrical and unsymmetrical ethers. It may be noted taht for preparing unsymmetrical ethers, the halide used should preferably be primary because secondary and tertiary alkyl halides may form alkenes as major product due to elimination process. CH_(3)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C)-Br+underset("Sodium ethoxide")(Na^(+)O^(-)-C_(2)H_(5))rarrunderset("2-methylpropene")(CH_(3)-overset(CH_(3))overset(|)(C)=CH_(2))+C_(2)H_(5)OH+NaBr Aryl ethers or phenolic ethers can be prepared by using sodium phenoxide and alkyl halides. However, aryl halides and sodium alkoxide cannot be used for preparing phenolic ethers because aryl halides are less reactive towards nucleophilic substitution reaction To which of the following mechanisms does the reaction ( Williamson's ether synthesis ) belong ?

Alexander Williamson prepared diethyl by a simple method, now called as Williamson's ether synthesis . In this method, an alkyl halide is treated with sodium alkoxide prepared from sodium and alcohol. This reaction is used in the synthesis of symmetrical and unsymmetrical ethers. It may be noted taht for preparing unsymmetrical ethers, the halide used should preferably be primary because secondary and tertiary alkyl halides may form alkenes as major product due to elimination process. CH_(3)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C)-Br+underset("Sodium ethoxide")(Na^(+)O^(-)-C_(2)H_(5))rarrunderset("2-methylpropene")(CH_(3)-overset(CH_(3))overset(|)(C)=CH_(2))+C_(2)H_(5)OH+NaBr Aryl ethers or phenolic ethers can be prepared by using sodium phenoxide and alkyl halides. However, aryl halides and sodium alkoxide cannot be used for preparing phenolic ethers because aryl halides are less reactive towards nucleophilic substitution reaction Arrange the following halides in decreasing order of reactivity towards Williamson's ether synthesis : underset((u))(CH_(3)CH_(2)CH_(2)Cl)," "underset((v))(CH_(3)CH_(2)CH_(2)Br), underset((w))((CH_(3))_(3)C-CH_(2)Br)," "underset((x))(H_(2)C=CH-CH_(2)Cl)

If it is possible to make only one meaningful English word from the second, the fifth, the seventh and the eighth letters of the word PHYSICAL using each letter only once, second letter of that word is your answer. If more than one such word can he formed your answer is 'M'. If no such word can be formed your answer is 'N’. 1) I 2) A 3) L 4) M 5) N

If it is possible to make only- one meaningful English word from the sixth, the fifth, the twelfth and the fourth letters of the word IMAGINATIONS using each letter only once, the second letter of that word ' is your answer. If no such word can be made mark 'X' as your answer, and if more than one such word can be formed mark 'M' as your answer. 1) I 2) N 3) S 4) X 5) M

Knowledge Check

  • Alexander Williamson prepared diethyl by a simple method, now called as Williamson's ether synthesis . In this method, an alkyl halide is treated with sodium alkoxide prepared from sodium and alcohol. This reaction is used in the synthesis of symmetrical and unsymmetrical ethers. It may be noted taht for preparing unsymmetrical ethers, the halide used should preferably be primary because secondary and tertiary alkyl halides may form alkenes as major product due to elimination process. CH_(3)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C)-Br+underset("Sodium ethoxide")(Na^(+)O^(-)-C_(2)H_(5))rarrunderset("2-methylpropene")(CH_(3)-overset(CH_(3))overset(|)(C)=CH_(2))+C_(2)H_(5)OH+NaBr Aryl ethers or phenolic ethers can be prepared by using sodium phenoxide and alkyl halides. However, aryl halides and sodium alkoxide cannot be used for preparing phenolic ethers because aryl halides are less reactive towards nucleophilic substitution reaction Methyl tertiary butyl ether (MTBE) is added in gasoline to improve its octane number . CH_(3)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C)-O-CH_(3) Which of the following is the best method for synthesis of the above ether ?

    A
    `(Ch_(3))_(2)C=CH_(2)+CH_(3)OH overset(H_(2)SO_(4))(rarr)`
    B
    `(CH_(3))_(3)CBr+CH_(3)ONa rarr`
    C
    `(CH_(3))_(3)C-O^(-)Na+CH_(3)I rarr`
    D
    All of these reactions

  • Alexander Williamson prepared diethyl by a simple method, now called as Williamson's ether synthesis . In this method, an alkyl halide is treated with sodium alkoxide prepared from sodium and alcohol. This reaction is used in the synthesis of symmetrical and unsymmetrical ethers. It may be noted taht for preparing unsymmetrical ethers, the halide used should preferably be primary because secondary and tertiary alkyl halides may form alkenes as major product due to elimination process. CH_(3)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C)-Br+underset("Sodium ethoxide")(Na^(+)O^(-)-C_(2)H_(5))rarrunderset("2-methylpropene")(CH_(3)-overset(CH_(3))overset(|)(C)=CH_(2))+C_(2)H_(5)OH+NaBr Aryl ethers or phenolic ethers can be prepared by using sodium phenoxide and alkyl halides. However, aryl halides and sodium alkoxide cannot be used for preparing phenolic ethers because aryl halides are less reactive towards nucleophilic substitution reaction To which of the following mechanisms does the reaction ( Williamson's ether synthesis ) belong ?

    A
    `S_(N^(1))`
    B
    `S_(N^(2))`
    C
    `E_(1)`
    D
    `E_(2)`

  • Alexander Williamson prepared diethyl by a simple method, now called as Williamson's ether synthesis . In this method, an alkyl halide is treated with sodium alkoxide prepared from sodium and alcohol. This reaction is used in the synthesis of symmetrical and unsymmetrical ethers. It may be noted taht for preparing unsymmetrical ethers, the halide used should preferably be primary because secondary and tertiary alkyl halides may form alkenes as major product due to elimination process. CH_(3)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C)-Br+underset("Sodium ethoxide")(Na^(+)O^(-)-C_(2)H_(5))rarrunderset("2-methylpropene")(CH_(3)-overset(CH_(3))overset(|)(C)=CH_(2))+C_(2)H_(5)OH+NaBr Aryl ethers or phenolic ethers can be prepared by using sodium phenoxide and alkyl halides. However, aryl halides and sodium alkoxide cannot be used for preparing phenolic ethers because aryl halides are less reactive towards nucleophilic substitution reaction Select the correct reaction (s) among the following reactions :

    A
    B
    C
    D
    • PRADEEP-HYDROCARBONS-CONCEPTUAL Questions
    1. Device a scheme for the synthesis of n-butane using CH3I as the only ...

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    2. How will you prepare a pure sample of propane ?

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    3. What happens when butanoic acid is heated with soda-lime at 630 K ? I...

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    4. Give structure of the product (X) in the following reaction : <center>...

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    5. Which of the following has the highest boiling point ? (i) 2-Methylp...

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    6. What effect the branching of an alkane has on its boiling point?

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    7. An organic compound C(8)H(18) on monochlorination gives a single monoc...

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    8. What are the main constituents of LPG ?

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    9. a. Why are alkanes inert ? b. Why the (C----C) bond rather than (C...

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    10. Is it possible to isolate pure staggered ethane or pure eclipsed ethan...

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    11. Dehydration of alcohol to form an alkene is always carried out with co...

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    12. Dehydration of 1-butanol or 2-butanol with conc. H2SO4 always gives th...

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    13. Predict the major product of the following reaction: C(6)H(6)+(CH(3))(...

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    14. Identify the organic products obtained in the following reaction :

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    15. Predict the products of the following reaction

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    16. Complete the following reactions with appropriate structures of produc...

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    17. How will you prepare 3-methylbut-1-yne by starting with ethyne ?

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    18. Predict the major product in the following reaction : R-C-=C-R under...

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    19. Identify the product in the reaction PhC-=CMe overset(H3O^(+),Hg^(2+)?...

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    20. How will you prepare (i) cis-pent-2-ene and trans-pent-2-ene by starti...

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