miss_snake
Harmless
Posts: 10
Registered: 16-5-2008
Member Is Offline
Mood: eXaMs
|
|
questions (alchols,ethers,aldehydes n ketones)
help me my exam is on sunday
1-how to convert glycerol to n propanol?
2-how to differentiate between alkanes and alkyl halides?
3-explain why a good yeild of a mixed ether can be obtained from a mixture of CH2=CH-CH2-OH and n propanol?
4-account for the following observations
(CH3)3-C-O-CH3
when anhydrous HI is added ------>CH3I + (CH3)3-C-OH
when aq. HI is added -------> CH3-OH + (CH3)3-CI
5)account for the order of decreasing basicity
6)whats the action of :
conc H2SO4
chlorine
on acetaldehyde and acetone
7)how to convert acetone to diethyl ketone?
8) how to convert propanal to acetaldehyde?
thats for now, hope you dont fail me 
|
|
|
Polverone
Now celebrating 21 years of madness
Posts: 3186
Registered: 19-5-2002
Location: The Sunny Pacific Northwest
Member Is Offline
Mood: Waiting for spring
|
|
Show the work you've put in to trying to answer these questions, and explain where you got stuck. Nobody's going to just provide answers to a list of
problems from your school work.
PGP Key and corresponding e-mail address
|
|
|
miss_snake
Harmless
Posts: 10
Registered: 16-5-2008
Member Is Offline
Mood: eXaMs
|
|
1) if i add HI to glycerol it will give 2 iodo propane then stuck
2)using Zn/HCl will work?
3)the 2 alchols will give an ether but i dont think thats the good yield the answer must be related to the double bond
4)thats cleavage by acid and it occurs at the side of the loner chain but i dont know why it is reversed in the aq case
5) factors that affect basicity
chain length
presence of branches on the chain
but i dont know how that applies to the question
6)H2SO4 removes water but i dont know on which site on the molcule
i know the products of PCl5 and HCl but Cl alone i have no idea
7) diethyl ketone comes from a 5C alchol or a 5C alkyl halide with 2 halogen atoms on the central C
but i dont know how to get that from a 3C compund
8)i dont know how to remove the excess C
methods of removing a C:
-iodoform test--->acid salt
-Br2/KOH on amide--->amine
-acid + NaOH/CaO --->alkane and i dont know how to convert alkane to aldehyde
-tertiary alcohol + HNO3----> ketone
|
|
|
![[*]](images/xpblue/default_icon.gif){kind=icon}
