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![[Post New]](/templates/default/images/icon_minipost_new.gif) 24 Feb 2008 17:38:57 IST
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convert: 1. ethanol to but-1-yne 2. bromomethane to propanone.
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Remember Cedric. Remember, if the time should come when you have to make a choice between what is right and what is easy, remember what happened to a boy who was good, and kind, and brave, because he strayed across the path of Lord Voldemort. Remember Cedric Diggory.
Albus Dumbledore
Goblet of Fire, Chapter 37, Page 724
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24 Feb 2008 17:44:25 IST
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sorry edited!
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24 Feb 2008 17:55:05 IST
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ethanol (SOCl 2 )  CH3CH2Cl (alc koh,NaNH2) CH  C - |
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24 Feb 2008 18:14:50 IST
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Bromomethane to propanone. 1. Hydrolyse to get methanol. 2. Heat with copper, methanal is formed. 3. Add methyl magnesium bromide in acidic medium, ethanol is formed 4. Heat with copper again , ethanal is formed 5. Add methyl magnesium bromide again , 2 propanol is formed 6. Heat with copper again , propanone is formed.
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24 Feb 2008 18:35:20 IST
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1.ethanol 2 butyne.......
a] CH3CH2-OH [OXIDATION i.e ACIDIC KMnO4]  CH3CH=O
CH3CH=O [PCl5] CH3CHCl2 + POCl3
CH3CHCl2 [ALC. KOH] ---CH2=CHCl
b] CH3CH2-OH [HCl] ---CH3CH2Cl
CH2=CHCl + CH3CH2CL [ WURTZ RXN] ----CH2=CHCH2CH3
probably dis may be done!!!!!!!
let me know if its correct!!!!!!!!!!
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24 Feb 2008 18:41:06 IST
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ethanol to but-1-yne
first react it with PCl5 then with HCCNa
bromomethane to propanone
first react bromomethane with HCCNa
now with Pd +BaSO4
now with H20+H+
now with Cu at 573
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24 Feb 2008 18:52:53 IST
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bromomethane to propanone
REACT CH3Br WITH KCN AND DEN WITH CH3MgBr AND DEN HYDROLYSIS
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24 Feb 2008 20:02:04 IST
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hey ash..........r these given in out ncert text book........
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24 Feb 2008 20:39:35 IST
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r these frm ncert syllabus??
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24 Feb 2008 20:46:39 IST
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yes, textbook questions!!
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Remember Cedric. Remember, if the time should come when you have to make a choice between what is right and what is easy, remember what happened to a boy who was good, and kind, and brave, because he strayed across the path of Lord Voldemort. Remember Cedric Diggory.
Albus Dumbledore
Goblet of Fire, Chapter 37, Page 724
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24 Feb 2008 20:52:14 IST
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bromomethane to propanone CH3Br +Li------------>CH3Li RLi + Cd-------------------> (R)2CdLi (R)2CdLi + Ethanoic acid gives propanone
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25 Feb 2008 13:48:16 IST
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ethanol to but-1-yne
1.C2H5OH+conc.H2SO4 CH2=CH2
2. CH2=CH2+H2/Pt/Ni(hydrogenation) CH3-CH3
3.CH3-CH3+Cl2CH3-CH2-Cl
4.CH3-CH2-Cl+Na/Dry Ether(Wurtz Reaction)CH3-CH2-CH2-CH3
5.CH3-CH2-CH2-CH3 +Cl2 CH3-CH2-CH2-CH2Cl
6.CH3-CH2-CH2-CH2Cl+Alc.KOHCH3-CH2-CH=CH2
7.CH3-CH2-CH=CH2 +Cl2 CH3-CH2-CHCl-CH2Cl
8.CH3-CH2-CHCl-CH2Cl+Alc.KOHCH3-CH2-CH=CH2
9.CH3-CH2-CH=CH2 +NaNH2CH3-CH2-C CH
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25 Feb 2008 21:37:55 IST
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2) CH3Br----Mg and ether---------->CH3MgBr CH3MgBr + CH3CHO------H2O------>CH3-CH(OH)-CH3---OXDN----->propanone i have a doubt: cant v do dehydrogenation directly with Cu? plz ans this too hope this helps u,ashgirl !!!!!!!!!!!!!!!!!!!!!
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Varsha
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25 Feb 2008 23:01:15 IST
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dehydrogenation of wat ??
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Remember Cedric. Remember, if the time should come when you have to make a choice between what is right and what is easy, remember what happened to a boy who was good, and kind, and brave, because he strayed across the path of Lord Voldemort. Remember Cedric Diggory.
Albus Dumbledore
Goblet of Fire, Chapter 37, Page 724
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