HDTenEightyP/NetNews huggingface dataset:
From: aflorjan@magnus.acs.ohio-state.edu (Alan S Florjancic)
Subject: Asymmetric Dihydroxylation
Summary:  Anyone have problems with this reaction...
Organization: The Ohio State University
Date: Fri, 9 Oct 1992 01:13:42 GMT


K. Barry Sharpless has published a whole truck-load of papers on this subject
in Organic journals over the past few years, most of which display the success
and scope of this chemistry.  What I want to know is, is there any organic
chemists out there who are experiencing difficulties with this chemistry.  The
graduate project I am working on deals with trans-napthalene with bromines in
the ortho position.  This chemistry does not seem to want to work;  it works
fine for trans stilbene, but not this system.  What I am looking for is what
types of side-products are people getting with this chemistry, other than the
hydroxy ketone side products...Reply here or via EMAIL.  If anyone has the
EMAIL address for Sharpless at Scripps, that would be nice, too.  Thanks...

Alan S. Florjancic
Grad Student-Organic Chem-OSU

"....when in doubt say steric hinderence..."
Newsgroups: sci.chem
From: dblackbu@carr11.alleg.edu (David Blackburn)
Subject: Re: Definition of "CFC"?
Organization: Allegheny College
Date: Wed, 7 Oct 1992 15:44:22 GMT

In article <1ata9oINNg7p@gap.caltech.edu> rickert@cco.caltech.edu (Keith  
Warren Rickert) writes:
> The 'real' CFC's are totally halogenated.
> Chlorodifluoro methane is not, and it is termed a 'HCFC'.
> These arent as long lived as CFC's and have less potential
> to reach the stratosphere and release chlorine. (or so I am told)
> Keith

True, this is mainly because the H atom is reactive enough to do the molecule  
in before it gets to the upper atmosphere. There are tables (sorry I don't  
have a ref.) of relative ozone depleting potential, which is a combination of  
lifetime and # of Cl atoms released into the ozone layer.

--

* Dave Blackburn  dblackbu@alleg.edu  flames to self@home.dev.null *          
* Chemistry, Macs, Hypercard, cats,  <>< religion, & the Dead      *
* (Anyone else who held these opinions would be as crazy as I am.) *
*   "Sometimes the songs that we hear are just songs of our own"   *
From: pbays@dopey.helios.nd.edu (phil bays)
Newsgroups: sci.chem
Subject: Re: hplc detectors
Date: 7 Oct 92 23:42:48 GMT
Organization: OUC, University of Notre Dame

I would also be interested in the HPLC detector comments.  Please
post or copy to pbays@saintmarys.edu.
Newsgroups: sci.chem
From: r0th@ellis.uchicago.edu (Dr. Samuel Conway)
Subject: Looking for a good intumescent compound
Reply-To: r0th@midway.uchicago.edu
Organization: University of Chicago Computing Organizations
Date: Thu, 15 Oct 1992 01:17:08 GMT

My kind friends and colleagues,

I am seeking a few good intumescent compounds, other than those 
commercially-available fireproof paints.  I require something that
will produce a large amount of ash when heated to decomposition,
but which will not catch fire itself.

I do seem to recall certain sodium silicates as having intumescent
properties, as well as naphtol, but as I have neither of this readily
available and am not near my Chem Abstracts, I can't be certain.
If anyone could provide an answer, I would be most grateful.


----
Dr. Samuel Conway         *  "If the guest isn't singing, 'Oh What a Beautiful
Roving chemist, wildlife  *  Morning' I don't immediately think, 'Oh, there's
rehabilitator, and all-   *  another one snuffed it in the night!'  Another
around nice guy!          *  name in the Fawlty Towers book of Remembrance.
r0th@midway.uchicago.edu  *  I mean, this is a hotel, not the Burma Railway!"

Newsgroups: sci.chem
From: rogers_m@watson.bms.com (MICHAEL ROGERS)
Subject: Re: ammonia and iodine?
Summary: ammonia and iodine: explosive?
News-Software: VAX/VMS VNEWS 1.4-b1  
Keywords: NH3 and I2?
Organization: Bristol Myers Squibb Pharmaceutical Research Institute
Date: Fri, 9 Oct 1992 21:00:00 GMT

In article <1at57pINNo3v@sam.ksu.ksu.edu>, hendric@sam.ksu.ksu.edu (Richard Hendricks) writes...
>I recently was told by someone that mixing ammonia and iodine creates some
>sort of explosive ppt.  Is this true, and could someone send me a description
>of the reaction?
> 
I once knew some jokers who used to make contact explosives by dropping iodine
xtals into conc. NH4OH.  I never tried it, but apparently it forms a ppt. 
which is the explosive.  They used to scatter it about on the floor and we'd
constantly be setting it off as we walked on it (Haw, haw!).

>-Richard Hendricks
>hendric@matt.ksu.ksu.edu
>..sigs are .silly
Xref: sparky sci.chem:3912 sci.engr.chem:526
From: grenader@buphy.bu.edu (Dmitry Grenader)
Newsgroups: sci.chem,sci.engr.chem
Subject: Electrochemical Deburring.
Date: 13 Oct 92 12:35:43 GMT
Followup-To: sci.chem
Distribution: usa
Organization: Boston University Physics Department


  I am doing a research about electrochemical deburring.  I would like
to find out what kind of applications already exist in this area.
Also I am not sure if those .chem and .engr.chem are the only groups I
should ask.
  Please, e-mail your response to me at grenader@teddy.bu.edu 
                                          grenader@buphy.bu.edu

       Thanks.

                            dmitry.
From: hwstock@snll-arpagw.llnl.gov (stockman harlan w)
Newsgroups: sci.chem
Subject: Re: Testing for lead
Date: 13 Oct 92 14:33:59 GMT
Organization: Sandia National Labs, Livermore, CA

>> I've never heard of PbO2 used in paint; the highest Pb oxide likely to
>> exist in air is Pb3O4 (minium). PbO2 seems like an impossible compound
>> at room T and 0.2 atm O2.
>
>I can assure you that PbO2 (lead dioxide) does exist at STP.  It is a brown
>solid that can be purchased commercially.  I used it extensively in my 


Once again, read the original post carefully. I said 0.2 atm O2. PbO2
may seem like a mild oxidizing agent because it doesn't react quickly,
but in truth it is much more oxidizing than H2O2. Bleach can exist in a
bottle at STP, but it isn't stable when left open to the atmosphere
(yes, it takes a while to break down!).

I just checked the poubaix diagram for Pb again, and find no stable
region for PbO2 below the dissociation of water to form O2 gas and H+.

If you wanted to use K permanganate to color your paint, you could do
that as well; it might produce a pretty color for a while, before it
turned the paint organics into soup.
Newsgroups: sci.chem
From: James Petts <pettsj@visigoth.demon.co.uk>
Subject: Re: Man and Woman
Organization: No Affiliation
Date: Mon, 12 Oct 1992 14:45:30 GMT
X-Useragent: Nuntius v1.1



In article <1992Oct12.103747.14632@hp9000.csc.cuhk.hk> MA NGAI LING,
b130778@hp9000.csc.cuhk.hk writes:
>	Came across the following in the local newspaper and would like to
>share with fellow chemists:

This was an ongoing graffito in the john in my University chemistry dept 
about 13 years ago. People kept on adding things like:

Resistance is lowered upon application of alcohol solution.

The characteristics tended to get more scatalogical and offensive as the 
graffito (im)matured.

James Petts

********************************************************************
* "We use the classical theory on Mondays, Wednesdays and Fridays, *   
*  and the quantum theory on Tuesdays, Thursdays and Saturdays."   *
************************************** Wm. Bragg *******************
From: aproden@ac.dal.ca (Andrew P. Rodenhiser)
Newsgroups: sci.chem
Subject: <None>
Date: 13 Oct 92 19:57:08 GMT
Organization: Dalhousie University, Halifax, Nova Scotia, Canada


Unfortunately, the title is somewhat misleading.  Once you start 
talking about industry and industrial waste, it is the Engineers 
who should be getting the bad name.  Chemists create pathways, 
engineers create the waste.

Andrew Rodenhiser
Chemistry/Engineering student

-- 
KISS/Cooper/Metal/Seattle/MontyPython/DouglasAdams/NASCAR/Oldsmobiles
Andrew P. Rodenhiser, Graduate Student, Colloidal Physical Chemistry
Dalhousie University, Halifax, N.S., Canada      APRODEN@AC.DAL.CA
Fluorescence Probing Studies of Polymer/Surfactant Interactions
"Now I know why everything turns grey, but it's our own world we paint
And I want the brightest, I want fluorescent, every day and night,
For the rest of my life, Open your eyes, Won't you?"--Faith No More
Newsgroups: sci.chem
From: tom@bim.itc.univie.ac.at (Tom Kovar)
Subject: Re: quipazine, where to buy
Organization: Inst.of Theor.Chemistry,Univ.of Vienna,Austria
X-Newsreader: Tin 1.1 PL3
Date: Fri, 16 Oct 1992 08:22:20 GMT

Ruud Hovius writes:
: Hello ,
: 
: I am working as biochemist at the EPFL in Lausanne, Switzerland, and I am
: looking for a compound called quipazine.
: However, the companies that used to make it do not do so anymore, as far as I
: know. Therefore I am getting quite desperate !

  Oh dear, chemists are getting rather lazy nowadays. Any good classical chemist
from the old school would tell you - get the structure and synthetise it
yourself! :-)

							Tom
(One day, I used to be practical chemist too; gosh, glad am I that it is
the past!!! :-))
From: whitbeck@equinox.unr.edu (Michael Whitbeck)
Newsgroups: sci.chem
Subject: Re: Teflon on pans
Date: 9 Oct 92 16:55:12 GMT
Organization: University of Nevada, Reno

In article <1992Oct1.211214.21877@ucsu.Colorado.EDU> knapp@spot.Colorado.EDU (David Knapp) writes:
:In article <1992Sep30.174945.13033@Princeton.EDU> ksthorn@phoenix.Princeton.EDU (Kurt Stephen Thorn) writes:
:>In article <1992Sep29.005433.18155@generic.uucp> taob@generic.uucp (Brian Tao) writes:
:>>BTW, how do you stick Teflon to the inside of a pan if it isn't supposed
:>to stick to anything?  :)
:>
:>I'd like to know this also - I've got an application where I'd very much like
:>to Teflon coat a metal cylinder (to insulate it).  It would be used for food
:>handling.  If anyone could give some leads on this, I'd be very appreciative.
:>
:>Kurt Thorn
:>ksthorn@phoenix.princeton.edu
:>
:>
:
:
:It is held to the pan *physically*. Small pockets ('caves') are etched into
:the surface of the metal and teflon is forced into those pockets and onto
:the pan. Those pockets are like little hands holding the teflon there.
:No chemistry involed in the sticking.
:
:It is not trivial the way they acheive such success. The way the pockets
:are created, their size, distribution etc as well as the process to put the
:teflon *into* them is proprietary.
:
:What type of situation would make teflon a good insulator? Are you talking
:electrical or thermal?
:
:
:-- 
:David Knapp                                      University of Colorado, Boulder
:Perpetual Student                                   knapp@spot.colorado.edu

I'm over my head here; but that won't stop me :-)

Recently I bought two spray-on teflon products; analysis
revealed that one was actually a mixture of teflon and wax the
other was just teflon (powder dispersed in propellant).

They both will rub off any surface that they are applied to.

I recall from school days the prof. sent some large Al tanks out
for 'permanent' teflon coating; I was told the difference
between that and teflon spray/painting was (1) temperature of
application (hot rather than room T) and (2) surface
preparation- a primer of sorts.

I vaguely recall seeing adds for adhesives that would work with
teflon; perhaps they might serve as a primer.


___________________________________________________________
|Mike Whitbeck             | whitbeck@equinox.unr.edu     |
|Desert Research Inst.     | whitbeck@wrc.unr.edu         |
|POB 60220                 |                              |
|RENO, NV 89506            | 702-673-7348                 |
|__________________________|______________________________|

All academics have the potential for being insatiable...
but the chemists are the most expensive and insatiable among the
expensive and insatiable. - J. Martin in "To Rise Above Principle"



Newsgroups: sci.chem
From: hees@cubic.com (Phil Hees)
Subject: Re: ammonia and iodine?
Organization: Boom!
Date: Fri, 09 Oct 92 11:00:41 GMT
Keywords: NH3 and I2?

hendric@sam.ksu.ksu.edu (Richard Hendricks) writes:
>I recently was told by someone that mixing ammonia and iodine creates some
>sort of explosive ppt.  Is this true, and could someone send me a description
>of the reaction?

Read the section "NI3.NH3" in the rec.pyrotechnics FAQ (most recent posting
was 7 October).  It contains good technical and "how-to" information as well
as safety notes.

--
Phil Hees
hees@cubic.com

Newsgroups: sci.chem
From: gkb1@chempc1.york.ac.uk (Graham Barlow)
Subject: Information on book required (NMR/Publisher/Bookshop)
Keywords: NMR, Query
Organization: University of York, UK
Distribution: sci.chem,sci.phys
Date: Thu, 8 Oct 1992 08:27:23 GMT

	
Hi, 

can anyone tell me the date of the current edition of the Book by 
Martin and Zektzer, published by VCH entitled

      "Two-Dimensional NMR Methods for 
       Establishing Molecular Connectivity"

I'm sure I saw a note from the publisher saying there was a 
1992 edition, wheras my bookshop tried to sell me a battered
1988 edition.  Unfortunately the flyer I got from VCH ended
up in the round filing cabined on the floor.

Thanks in advance,

Graham Barlow


~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Graham Barlow                      Internet gkb1@chempc1.york.ac.uk
NMR Service                              or gkb1@tower.york.ac.uk
Department of Chemistry             JANET   gkb1@uk.ac.york
University of York, UK                                
__________________________________________________________________________________
From: bg055@cleveland.Freenet.Edu (Stewart Rowe)
Newsgroups: sci.chem
Subject: Re: alkalis, acids and chemical drain openers damage to pipes
Date: 8 Oct 1992 01:44:35 GMT
Organization: Case Western Reserve University, Cleveland, Ohio (USA)
NNTP-Posting-Host: hela.ins.cwru.edu


And yes, acids eat the hell out of pipes. Plumbers sometimes use
hydrochloric acid (muriatic acid) for bad cases of blockage, but
it is not recommended.
 
Hydrolysing the grease to soap and glycerine, which the alkalis do,
should, in effect, dissolve the "binder" and let the other materials
flow out. 
 
An interesting problem is that a liquid alkali may clear just a small
hole at the bottom of the drain pipe -- there is no mechanism to
cause it to migrate up the walls. This may be one function of the aluminum
chips in solid Drano: to cause the alkali to spatter enough to get on
the upper sides of the plugged pipe.
 
There are now available enzyme preparation which claim to digest
the fat/grease. They are OK for _keeping_ a drain clean, but not
effective for opening an already-plugged drain.
 -Stewart Rowe usr2210a@tso.uc.edu  srowe@igc.org
From: aproden@ac.dal.ca (Andrew P. Rodenhiser)
Newsgroups: sci.chem
Subject: Re: No wonder chemists have such a bad name!
Date: 13 Oct 92 19:58:08 GMT
Organization: Dalhousie University, Halifax, Nova Scotia, Canada

> 
> Unfortunately, the title is somewhat misleading.  Once you start 
> talking about industry and industrial waste, it is the Engineers 
> who should be getting the bad name.  Chemists create pathways, 
> engineers create the waste.
> 
> Andrew Rodenhiser
> Chemistry/Engineering student
> 
> -- 
> KISS/Cooper/Metal/Seattle/MontyPython/DouglasAdams/NASCAR/Oldsmobiles
> Andrew P. Rodenhiser, Graduate Student, Colloidal Physical Chemistry
> Dalhousie University, Halifax, N.S., Canada      APRODEN@AC.DAL.CA
> Fluorescence Probing Studies of Polymer/Surfactant Interactions
> "Now I know why everything turns grey, but it's our own world we paint
> And I want the brightest, I want fluorescent, every day and night,
> For the rest of my life, Open your eyes, Won't you?"--Faith No More
Newsgroups: sci.chem
From: cabku01@mailserv.zdv.uni-tuebingen.de (Hartwig Kuehbauch)
Subject: Re: No wonder chemists (????)
Organization: Comp. Center (ZDV) U of Tuebingen, FRG
Date: Mon, 12 Oct 1992 08:08:50 GMT

In <00961EBE.5DA4CF60@Msu.oscs.montana.edu> uchpcjv@Msu.oscs.montana.edu writes:

>Ummmm...shouldn't that be "No wonder POLITICIANS have such bad names" (?).

Well, that's true! But as usual people take the easiest way. If you don't
understand what's going on in there, if you only see some people walking
around with  white clothes you normally take these people to be responsible
what happens in a laboratory, a power plant, or whatelse ever.

I am a chemist, and I know not one single person, who actually wants to poison
the environement. Chemists know about the dangers of the substances they deal
with (at least they should know). It's a mere matter of economy, I think.
It's cheaper, so let's do it this way! But the people who have the power to
decide normally aren't chemists!
The usual objection to this point of view is: But the chemist is responsible,
because he is the person who acts (often against his better knowledge). Well,
that's true, but chemists normally aren't heroes, they are quite normal people.

No chemist would refuse to make things more secure. It would be a great
scientific challenge to do research on that --- but who's gonna pay for it?
As long as people aren't willing to spend money for better production and
research terms they won't get it!
As long as we buy this ridiculous overpowered cars, as long as we waste 
energy, we don't have the right to complain about our living conditions.

Well, of course, that's my opinion.

Hartwig.


--
=============================================================================
= Hartwig Kuehbauch - University of Tuebingen - Dep. of Inorg. Chemistry II =
= (cabku01@mailserv.zdv.uni-tuebingen.de)     - Germany -                   =
=============================================================================
Newsgroups: sci.chem
From: stngiam@athena.mit.edu (Shih-Tung Ngiam)
Subject: Crystal demos
Organization: Massachusetts Institute of Technology
Date: Fri, 9 Oct 1992 21:04:19 GMT

  
  I'd like to grow some crystals for fun.  Does anyone have any
suggestions as to what compounds would give nice coloured crystals?
Also, what vendors are wiling to sell chemicals to individuals?  I'd
rather not spend research accounts on personal decorations.

Shih Tung
Chem E
Best l'il Tech School
in Cambridge
From: HRWood@cup.portal.com (Harold R Wood)
Newsgroups: sci.chem
Subject: Re: ammonia and iodine?
Date: Wed,  7 Oct 92 02:32:45 PDT
Organization: The Portal System (TM)

Richard,
Regarding Nitrogen Triiodide.  This material is indeed extreamly
sensitive in the dry state.  It is easily produced by making and 
iodine solution by disolving iodine crystals in a potassium 
iodide solution.  Ammonium hydroxide (ammonia) is then added to 
this iodine solution.  The nitrogen triiodide will ppt out of
solution, forming a brownish solid.  This material will slowly
decompose, forming nitrogen and iodine.  If the material is 
filtered and allowed to dry it becomes quite sensitive.  Touching
it with a feather is enough to detonate it.  A "trick" which 
was done was to filter the material onto filter paper and cut the 
paper into small pieces and spread these on the floor in front of 
the door.  After the papers and NTI dried, the next person to walk
in would set off numerous small explosions.  This is not a 
recomendation!!
Actually there is little danger if caution is used and only small
quantities are produced.  As a sideline, Nitrogen Triiodide was
used as an explosive in one of Robert A Heinlein's novels -
Farnam's (sp) Freehold, I believe.
In anycase, the material should be produced in small quantites
and with safety glasses and other safe laboratory practice.
Rick
From: BFRS@MUSICB.MCGILL.CA (BFRS)
Newsgroups: sci.chem
Subject: hplc detectors
Date: 7 Oct 92 22:11:47 GMT
Organization: McGill University

My lab is in the market for a new variable wavelength HPLC detector.
We have been looking at Shimadzu detectors and I was wondering if
anybody could give me some information concerning this brand. I am
interested in knowing the instrument's reliability, baseline stability,
accessability of parts, and the price to quality ratio. I would also
appreciate your overall impression. If possible, could you send any
comments directly to my account.

Brian Spencer (bfrs@musicb.mcgill.ca)
From: neal@cmptrc.lonestar.org (Neal Howard)
Newsgroups: sci.chem
Subject: Re: Is Math Hard?
Date: 14 Oct 92 17:24:37 GMT
Organization: CompuTrac Inc., Richardson TX

In article <1992Oct14.035431.6685@ichips.intel.com> bhoughto@sedona.intel.com (Blair P. Houghton) writes:
>In article <1992Oct13.202828.13373@pellns.alleg.edu> frisinv@alleg.edu writes:
>>is the hardest thing on the face of this earth. I know others who laugh  
>>insanely and say math is child's play. I want to take a little poll:
>
>Now is the time for all good men to go edit a few
>files full of uuencoded bytes; it will be as informative...
>
>				--Blair
>				  "All good women are taken."

.... and I always thought diamond was the hardest thing on the face of the 
Earth :-)
From: ralf@ark.abg.sub.org (Ralf Stephan)
Newsgroups: sci.chem
Subject: Re: 1992 Nobel Prizes: a prediction
Date: 10 Oct 92 20:15
Organization: Magick Shoppe, Gurth City

slee@hyper.hyper.com (Thomas Slee) writes:
> In article <1992Oct9.103523.25066@cc.ic.ac.uk> rzepa@ic.ac.uk (Henry Rzepa) w
> rites:
> >In article <138426@lll-winken.LLNL.GOV> Alison Chaiken,
> >chaiken@cmsgee.llnl.gov writes:
> >>
> >
> >A nice view of the world from insular USA. If it comes to C60, Harry
> >Kroto (from outside the USA) should certainly be included. 
> >Or does the rest of the world not matter?
> 
> Agreed.  Come to that, if Huffman is suggested (USA), where is
> Wolfgang Kratschmer (Germany)? 

Of course, they worked together on that, I think at the MPI Heidelberg.

--ralf
Newsgroups: sci.chem
From: 890091b@ace.acadiau.ca (HEIDI JILL BURKHOLDER)
Subject: Articles-high school level
Organization: Acadia University
Date: Tue, 13 Oct 1992 15:39:01 GMT

	Acadian Letters is a newsletter published by Acadia University's 
Chemistry club for high school teachers/students across Canada. We would 
gladly accept any suggestions, ideas, articles, labs, whatever, that would 
be appropriate on the high school level.
	Our goal is to make chemistry an attractive option for these 
students as they make their university/career choices. That is, to 
illustrate aspects of the discipline that they may not be aware of, or 
just to peak the interest of bright minds who may otherwise be lured 
(or scared) away from chem.
	Submissions can range from your favorite molecule to a cool chemist 
to new products/appilcations to games to labs to anything else you 
desire.	Our advance thanks for your interest!
From: Ligon@macgw1.ge.com (Woody Ligon)
Newsgroups: sci.chem
Subject: Unwanted dither in scanned images
Date: 16 Oct 92 12:15:31 GMT
Article-I.D.: crd.1992Oct16.121531.1365
Distribution: usa
Organization: GE-CRD

We are interested in using a scanner to import spectroscopic data (usually
mass spectra) into a Macintosh for incorporation into reports.  

We find that histogram-like spectra with narrow vertical lines tend to
acquire random shifts of 1 or 2 pixels along the vertical lines resulting 
in an unacceptable appearance. Do we just need a much higher resolution scanner
(currently 300 DPI)? 

Has anyone approached and hopefully solved this difficulty?  Is there software
which will "clean-up" scanned line art??.

Thanks in advance for any help

Woody Ligon
GE Corporate R&D
(Ligon@macgw1.ge.com) 
Newsgroups: sci.chem
From: vsummers@polaris.cv.nrao.edu (Vince Summers)
Subject: re: sulfuric acid and clorox
Organization: National Radio Astronomy Observatory
Distribution: sci.chem
Date: Mon, 12 Oct 1992 19:33:51 GMT

     I haven't looked it up, but I would have thought that hypochlorous
acid would have resulted, which would give Cl20 (two chlorines, one 
oxygen).

Vince Summers
vsummers@polaris.cv.nrao.edu