Subject: None
Dear all organic chemist,
I want to synthesize the compound called N,N'-dialkyl-1,4-PHENYLENEDIAMINE.
Could you provide me some useful and simple synthesis methods and relvent literarure?
Thank you in advance
H. Jiang
hjiang@fspu.edu.cn
__________________
Date: Sun, 5 Mar 2000 19:17:43 -0800 (PST)
From: lia kamelia
Subject: None
dear people
i read that chitosan is the chelating agents for metal ions, can u tell me what metal ions is it? and why?
thanks
__________________
Date: Mon, 6 Mar 2000 14:3:47 +0800
From: Jiang Heng
Subject: ORGLIST: N,N'-di-iso-propyl 1,4-phenylenediamine
Dear friends,
Could you tell me how to synthesize the compound called N,N'-di-iso-propyl 1,4-phenylenediamine. Is there any relvent literature? Which cooperation produce this product.
Many thanks in advance.
Jiang Heng
hjiang@fspu.edu.cn
__________________
Date: Mon, 6 Mar 2000 15:11:02 +0700
From: nhattu@stu2.hcmuns.edu.vn
Subject: ORGLIST: How to make starch Acetate
Dear All The Chemist,
I am looking for the best method to synthesis of
starch acetate,
I just know that this to synthesis of starch acetate
is a kind of ester reaction,
Anhydride acetic and Acid acetic is used.
And I don't know the temp. and time in reaction.
Thanks for your helping me.
________________________
Phan Nhat Tu.
Depatment of Organic Chemistry,
University of Natural Sciences,Ho Chi Minh city, Viet Nam.
mailto:
tu_adams@yahoo.com
webpage:
http://www.geocities.com/tu_adams
_________________________
__________________
Date: Mon, 06 Mar 2000 09:15:10 -0500
From: Jack Sullivan
Subject: ORGLIST: Re: None
lia kamelia wrote:
>
> dear people
>
> i read that chitosan is the chelating agents for metal ions, can u
> tell me what metal ions is it? and why?
>
> thanks
>
Chitosan is "a first-rank chelating polymer of transition metals (1).
... Chitosan collects metal ions selectively, that is, it does not take
up alkali or alkali-earth ions but it collects transition and
post-transition metal ions. The metal collection rate depends on pH of
the solution, counter ions of metal salts, etc." (Chitin, Chitosan &
Related Enzymes, ed. John P. Zikakis, Academic Press, 1984.
Specific metals mentioned were Cr, Mn, Fe, Cd, Co, Ni, Cu, Zn, and Hg.
Ammonium sulfate increases the collection rate.
The chelating effect is presumed to be because of electron donation by
free amino groups on the chitosan polymer, but other factors are
involved as well.
Ref 1: Muzzarelli, R., "Chitin", Pergamon Press (1977)
--
Jack Sullivan
__________________
Date: Tue, 7 Mar 2000 8:44:40 +0800
From: Jiang Heng
Subject: ORGLIST: ammonium hydroxide
Organization: Fushun Petroleum Institute
Dear all,
How to convert benzyldimethylstearylammonium chloride to benzyldimethylstearylammonium hydroxide? Could you provide me some simple and inexpensive methods?
Many Thanks
Jiang Heng
hjiang@fspu.edu.cn
__________________
Date: Tue, 7 Mar 2000 16:57:9 +0800
From: Jiang Heng
Subject: ORGLIST: benzyldimethylstearylammonium hydroxide
Dear all,
In order to convert benzyldimethylstearylammonium chloride to
benzyldimethylstearylammonium hydroxide, I am aware of that benzyldimethylstearylammonium chloride can react with KOH in alcohol. However, I am not sure about this reaction's condition(temperature, time, the reactant's mole ration etc.). Can someone give me some helpful advice?
Many thanks
P.S.: Many thanks for the DUFRASNE FRANCOIS's good idea.
Jiang Heng
hjiang@fspu.edu.cn
__________________
Date: Tue, 7 Mar 2000 11:17:56 +0200
From: zabicky@bgumail.bgu.ac.il (Jacob Zabicky)
Subject: Re: ORGLIST: ammonium hydroxide
Hello Heng,
You can try passing an aqueous solution of the chloride salt through a
strong-base ion exchange column. These resins usually are quaternary
ammonium hydroxide themselves, so you are exchanging the anions.
jacob
>Dear all,
>
>How to convert benzyldimethylstearylammonium chloride to
>benzyldimethylstearylammonium hydroxide? Could you provide me some simple
>and inexpensive methods?
>
>Many Thanks
>
> Jiang Heng
> hjiang@fspu.edu.cn
>
>__________________
x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x
Prof. Jacob Zabicky Tel. 972-7-6461271/6461062/6472754
Institutes for Applied Research Fax. 972-7-6472969
Ben-Gurion University of the Negev Private: POB 12366, Beer-Sheva 84863
POB 653, Beer-Sheva 84105, ISRAEL Tel. 972-7-6496792
http://profiler.bgu.ac.il/site/main.cfm
x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x
__________________
Date: Tue, 7 Mar 2000 02:36:41 -0800 (PST)
From: bhavin goradia
Subject: ORGLIST: VLE data for hetero-azetrope of water-benzene-ethanol
Hi everybody!
I'm a student in my final year of chemical engg.,
studying in Mumbai, India.
I need the Vapor-Liquid equilibrium data for the
Hetero-Azeotrope of Benzene-Ethanol-Water system wnich
forms an Azeotrope at 64.86 degree celsius.
I would appreciate if anyone could either send me the
link to an online data page or give me the name of the
book in which I can find this data.
Thanx.
regards,
Bhavin G.
March 7, 2000
__________________
Date: Tue, 7 Mar 2000 11:27:10 +0000 (GMT)
From: Benjamin Hagger
Subject: Orglist
To everyone that takes time out to read this,
I am attempting (unsuccessfully, thus far) to synthesise
1,2-methylene-4,5-nitrobenzene (or benzodioxle: 4,5-nitro). The mono nitro
and the trinitro I have been able to synthesise more than once!. If anyone
could point me in the direction of a synthesise or literature reference I
would be most gratefull.
P.s I am a final year undergraduate working on nitration reactions as my
final project.
Ben
Benjamin Hagger
Brunel University, UK
ca96bbh@brunel.ac.uk
__________________
Date: Tue, 7 Mar 2000 21:34:45 -0600
From: soon
Subject: ORGLIST: How to name F6H8?
Hi, everybody,
I'm a graduate student in Zhongshan Ophthalmic Center of Sun-Yatsen University of Medical
Sciences.I'm researching a new meterial named F6H8 using in medical field, I want to know its
standard IUPAC name,the molecular structure is
F F F F F F H H H H H H H H
| | | | | | | | | | | | | |
F-C-C-C-C-C-C-C-C-C-C-C-C-C-C-H
| | | | | | | | | | | | | |
F F F F F F H H H H H H H H
Briefly,this is a new meterial used in eye to treat retinal detachment,a serious eye disease,I
want to investigate its biochemical stability in eye.It's a colorless homogeneous solution in room
temperature. I wonder there are some new things after they stay in eye for a long time.I want to
conform their existance and molecular structure,so I plan to use chromatograph(gas/mass
spectroscopy,infrared spectroscopy,NMR)to analyse it,Could you tell me which one is best and how to
do it appropriately.
Any advice will be appreciated.
X.Y.DING
xyding@163.net
__________________
Date: Tue, 07 Mar 2000 14:55:39 +0100
From: Jonas Nilsson
Subject: Re: ORGLIST: How to name F6H8?
How about
1,1,1,2,2,3,3,4,4,5,5,6,6-tridecafluoro tetradecan
/jN
--
_____________________ _____________________
| Jonas Nilsson | | |
|Linkoping University | | Telephone |
| IFM | | --------- |
| Dept. of Chemistry | | work: +46-13-285690 |
| 581 83 Linkoping | | fax: +46-13-281399 |
| Sweden | | home: +46-13-130294 |
|_____________________| |_____________________|
__________________
Date: Wed, 8 Mar 2000 11:28:33 +0200
From: zabicky@bgumail.bgu.ac.il (Jacob Zabicky)
Subject: Re: ORGLIST: VLE data for hetero-azetrope of water-benzene-ethanol
Hello Bhavin,
Try the CRC Handbook of Chemistry and Physics, that carries a table of
binary and ternary azeotropes.
Jacob
x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x
Prof. Jacob Zabicky Tel. 972-7-6461271/6461062/6472754
Institutes for Applied Research Fax. 972-7-6472969
Ben-Gurion University of the Negev Private: POB 12366, Beer-Sheva 84863
POB 653, Beer-Sheva 84105, ISRAEL Tel. 972-7-6496792
http://profiler.bgu.ac.il/site/main.cfm
x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x
__________________
Date: Wed, 8 Mar 2000 12:06:58 +0200
From: zabicky@bgumail.bgu.ac.il (Jacob Zabicky)
Subject: Re: ORGLIST: How to name F6H8?
Hello,
Almost there, but to stick to English usage, no space in the middle and an
"e" at the end: 1,1,1,2,2,3,3,4,4,5,5,6,6-tridecafluorotetradecane.
x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x
Prof. Jacob Zabicky Tel. 972-7-6461271/6461062/6472754
Institutes for Applied Research Fax. 972-7-6472969
Ben-Gurion University of the Negev Private: POB 12366, Beer-Sheva 84863
POB 653, Beer-Sheva 84105, ISRAEL Tel. 972-7-6496792
http://profiler.bgu.ac.il/site/main.cfm
x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x
__________________
Date: Thu, 09 Mar 2000 01:05:18 PST
From: "Alessandra B"
Dostları ilə paylaş: 
