Home » Ask & Discuss » Chemistry. » Organic Chemistry « Back to Discussion

Organic Chemistry

Forum Expert

Joined:	6 Jan 2007
Post:	706

3 Feb 2007 12:39:58 IST

0 People liked this

547

For KIRAN and all community members!

None

What happens when glucose is treated with large amount of PCl₅?

Will all the -OH groups get substituted by -Cl?

Also what happens when glucose is oxidised with strong oxidizing agents?

Share this article on:

Comments (5)

Marshall Eriksen

Blazing goIITian

Joined: 24 Dec 2006

Posts: 1312

3 Feb 2007 14:27:07 IST

Like 0 people liked this

i dunno exactly but i know for sure that an atom cannot have more than one OH radical becuz then it becomes unstable....u have to remove a water molecule from it and then u r left with either a ketone or a aldehyde....i may be wrong but on the whole......the fact remains true

Marshall Eriksen

Blazing goIITian

Joined: 24 Dec 2006

Posts: 1312

3 Feb 2007 14:29:51 IST

Like 0 people liked this

for eg .
H
|
H--C--OH
|
OH
is unstable
we remove a water molecule and get

H - CHO
FormAldehyde

this may be applicalbe to ur first query

Marshall Eriksen

Blazing goIITian

Joined: 24 Dec 2006

Posts: 1312

3 Feb 2007 14:33:09 IST

Like 0 people liked this

for eg .
H
|
H--C--OH
|
OH
is unstable
we remove a water molecule and get

H - CHO
FormAldehyde

this may be applicalbe to ur first query

* consider the four bonds on C....its difficult to draw with all the dashes

CyBorG

Forum Expert

Joined: 6 Jan 2007

Posts: 706

6 Feb 2007 17:52:37 IST

Like 0 people liked this

Hey KIRAN try this!!!

Kiran H

Forum Expert

Joined: 7 Nov 2006

Posts: 296

9 Feb 2007 20:32:52 IST

Like 0 people liked this

Hi Adarsh

Sorry for the delay.

PCl5 is a good dehydrating agent. So it replaces all the OH groups in glucose. The aldehydic group is untouched.

Reason for this is observed by drawing the Ring structure, The pyranose ring.

And hence the OH groups are replacable.

Njoy!

Quick Reply

Reply

	Some HTML allowed.
	Keep your comments above the belt or risk having them deleted.
	Signup for a avatar to have your pictures show up by your comment
	If Members see a thread that violates the Posting Rules, bring it to the attention of the Moderator Team