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reactivity of esters
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Uncle Al
science forum Guru


Joined: 24 Mar 2005
Posts: 1226

PostPosted: Thu Mar 24, 2005 6:26 pm    Post subject: Re: reactivity of esters Reply with quote

juicymixx@mailinator.com wrote:
Quote:

I need a quick chart of the reactivity of esters with other compunds
(specifically amines). I would like to contrast the reactivity of
each... I've glanced through a couple organic textbooks looking for
such a chart (seems I've seen one before?) but couldn't find it.
Anyone have a web link to this kind of chart or data with which I could
make a chart? Specifically I'd like to compare the reactivity of
esters and amines to esters and other compounds.

There are steric and electronic effects plus concentration and pH vs.
equilibrium issues. Overall, in an equimolar mixture of alcohol and
amine, amides are much the preferred product.

--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
http://www.mazepath.com/uncleal/qz.pdf
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John Bauer
science forum beginner


Joined: 24 Mar 2005
Posts: 1

PostPosted: Thu Mar 24, 2005 7:25 pm    Post subject: Re: Is knowledge in chemistry (atomic model) perfect ?? Reply with quote

PD wrote:

<snip>
Quote:

Don't confuse the correctness of a theory with the completeness of its
application. The latter is not required for the former.

PD


"In theory, there is no difference between theory and practice. But, in
practice, there is." ~ Jan van de Snepscheut
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Art Ickles
science forum beginner


Joined: 24 Mar 2005
Posts: 4

PostPosted: Thu Mar 24, 2005 7:38 pm    Post subject: Re: Antonoff's Rule: Where did George Antonoff serve last? Reply with quote

Quote:
I don't know who you asked for the reprints, but you should
try to contact the University Archivist (or whatever they
call that person) at Fordham.

Found it:
http://www.library.fordham.edu/archives/archiveinformation.html

"Archives -The repository for University records from 1841 to present; ..."

Contact Information:
Patrice Kane, Head of Archives and Special Collections

Vivian Shen, Preservation and Conservation Librarian

Maybe Patrice Kane can point you in the right direction? Maybe tell
her in an e-mail that you'd like to include information about Fordham
Univ in the Antonoff display during your Golden Jubilee. "Antonoff
made great achievements at Fordham from 19xx to 19yy. For example
(Picture of GA and his lab? Students?) ... Then he came here."
Sucking up sometimes helps!

And it makes it closer to her "job" of doing things to help to
promote Fordham and not just seem like an obscure or distracting
question from overseas.

Good luck!






--
Sent by xanadoof from yahoo part from com
This is a spam protected message. Please answer with reference header.
Posted via http://www.usenet-replayer.com
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Jeremy Samuels
science forum beginner


Joined: 24 Mar 2005
Posts: 3

PostPosted: Thu Mar 24, 2005 7:42 pm    Post subject: Re: Making Nickel Chloride Reply with quote

Sounds easy enough..I'm trying to get some real nickel chloride from a
plating supply house, but if that doesn't work I'll use the sodium
bicarbonate/nickel sulphate reaction.
To answer Wilco's question of why I want to make nickel chloride, the
best electroplating results for nickel are obtained using a Watt's
Bath. For some reason, it uses nickel sulphate and nickel chloride.
About twice as much sulphate as chloride.
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Derek
science forum beginner


Joined: 24 Mar 2005
Posts: 5

PostPosted: Thu Mar 24, 2005 8:35 pm    Post subject: re:(",) Do You Want To Know For Sure You Are Going To Heaven? Reply with quote

balls


Posted Via Usenet.com Premium Usenet Newsgroup Services
----------------------------------------------------------
** SPEED ** RETENTION ** COMPLETION ** ANONYMITY **
----------------------------------------------------------
http://www.usenet.com
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PD
science forum Guru


Joined: 03 May 2005
Posts: 4363

PostPosted: Thu Mar 24, 2005 9:28 pm    Post subject: Re: Is knowledge in chemistry (atomic model) perfect ?? Reply with quote

I'm going to print that out and tape it to my monitor.

PD
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donald j haarmann
science forum addict


Joined: 24 Mar 2005
Posts: 58

PostPosted: Thu Mar 24, 2005 10:13 pm    Post subject: Re: How to neutralize cyanide?? Reply with quote

muha" <muhammar@hotmail.com

I allways thought that cyanide + bleach => cyanogen chloride
Quote:

I used to work with cyanogen bromide and it was nasty!




---------
Cyanide and hypochlorite in an alkaline solution is oxidized to less toxic
( LD50 mouse - 260mg/kg) cyanate.



--
donald j haarmann
-----------------------------
Do you believe that the sciences would ever had
arisen and became great if there had not beforehand
been magicians, alchemists, astrologers and WiZards,
who thirsted and hungered after abscondite and
forbidden powers?
Friedrich Nietzsche
Die fröhliche Wissenschaft, IV, 1886
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John Savage
science forum addict


Joined: 24 Mar 2005
Posts: 63

PostPosted: Thu Mar 24, 2005 11:06 pm    Post subject: Re: Earth's 1st AirConditioner; coolant of IceDust + ozone replenishment Reply with quote

Archimedes Plutonium <a_plutonium@iw.net> writes:
Quote:
File 044b A tandem solution to create Earth's
1st AirConditioner and to halt Global Warming

There was a science documentary recently which highlighted the finding
on changes to temperature and amount of sunlight for the couple of days
following 9/11 when most commercial airliners were grounded. The lack
of sunlight-reflecting condensation trails in the upper atmosphere saw
the USA receive more sunlight and average temperatures rise by 1 degree.

Measurements over many decades reveal the Soviet Union is today
receiving 30% less sunlight than it was 50 years ago. This reduction
is being attributed largely to the droplets of moisture that form
around particulate matter in the upper atmosphere. These droplets are
much smaller spheres than those in naturally-formed clouds and they
reflect an amount of sunlight quite disproportionate to their mass.

It seems that the greenhouse effect (due largely to increased CO2) is
being counterbalanced by con trails and other industrially-induced
droplets of moisture in the upper atmosphere. I guess this qualifies
as an umbrella of fog, or is it really a sparse high-atmospheric smog?
--
John Savage (my news address is not valid for email)
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John Savage
science forum addict


Joined: 24 Mar 2005
Posts: 63

PostPosted: Thu Mar 24, 2005 11:06 pm    Post subject: Re: Why is water clearer near the equator? Reply with quote

Quote:
cafeinst@msn.com> wrote in message
news:1111512014.023945.224320@z14g2000cwz.googlegroups.com...

William Oertell wrote:
Water's too warm for the blue-green algae that clouds cooler waters.


So the blue-green algae in colder climates makes the water look
brown-green?

Blue-green algae turns red-brown as it decays. Maybe this happens where
it gets carried into waters poorer in nutrients?
--
John Savage (my news address is not valid for email)
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Oscar Lanzi III
science forum Guru Wannabe


Joined: 30 Apr 2005
Posts: 176

PostPosted: Thu Mar 24, 2005 11:10 pm    Post subject: Re: Making Nickel Chloride Reply with quote

Why "inert" nickel sulfate doesn't work here: it's because in a sense
sulfate is TOO inert. You need speciically chloride to make nickel
plating work, at least with a soluble nickel anode, If you don't have
the chloride, anodizing the nickel anode leads to formation of a
resistive oxide film. Chloride breaks that up by forming chlorine
instead of oxygen at the interface to oxidize the nickel.

--OL
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Joshua Halpern
science forum beginner


Joined: 24 Mar 2005
Posts: 40

PostPosted: Thu Mar 24, 2005 11:53 pm    Post subject: Re: Is knowledge in chemistry (atomic model) perfect ?? Reply with quote

PD wrote:
Quote:
I'm going to print that out and tape it to my monitor.

PD

My two favorites are


In theory the experiment worked.

Well doc, there was no noise, unfortunately there was no signal either.

josh halpern
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Joshua Halpern
science forum beginner


Joined: 24 Mar 2005
Posts: 40

PostPosted: Thu Mar 24, 2005 11:55 pm    Post subject: Re: Is knowledge in chemistry (atomic model) perfect ?? Reply with quote

David Cross wrote:
Quote:
"Scottie" <whatishiggs@yahoo.com> wrote in message
news:1111629418.590493.210620@f14g2000cwb.googlegroups.com...

Is the present knowledge of chemistry perfect or 100%
accounted for?? Meaning all the physics concepts of
the electrons (and atoms) can explain every single fact
in chemistry and no mystery absolutely of any kind or
concepts yet to be discovered??


The qualitative picture of many-electron atoms is fairly well-established, but
the exact quantitative stuff is, asd I understand it, necessarily subject to
approximation, even more so for the heavy elements there is continuing
theoretical work because of the impact of relativistic effects as well as the
lanthanide contraction. I don't know a helluva lot of computational chemistry
so you should wait till Uncle Al comes along and sets us all straight on that.
:)

Might try sonoluminescence.


josh halpern
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Steve Turner
science forum beginner


Joined: 25 Mar 2005
Posts: 3

PostPosted: Fri Mar 25, 2005 12:26 am    Post subject: Re: How to neutralize cyanide?? Reply with quote

On 24 Mar 2005 07:56:00 -0800, "muha" <muhammar@hotmail.com> wrote:

Quote:
I allways thought that cyanide + bleach => cyanogen chloride

I used to work with cyanogen bromide and it was nasty!

Cyanogen halides are very nasty, but would not very long lived in
highly alkaline media.

Steve Turner
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Allan Adler
science forum beginner


Joined: 25 Mar 2005
Posts: 30

PostPosted: Fri Mar 25, 2005 12:37 am    Post subject: Re: Verifying someone's chemistry background Reply with quote

schultr@mail.biu.ack.il (Richard Schultz) writes:

Quote:
I was going to say that they only index Ph. D. dissertations granted by U.S.
institutions, but then I discovered that *my* Ph. D. thesis does not appear to
have been indexed by Chemical Abstracts. It still is listed in the on-line
catalog of the library of the university from which I received my degree,
however.

I don't know where you got your degree. I'm presently reading
a PhD thesis in mathematics that was written in Hebrew some
time ago. I don't know if any Israeli chem PhD theses were written
in Hebrew.

The reason I mention this is that I'm always glad to have an excuse to read
mathematics in a language I'm interested in learning, and for sufficiently
interesting mathematics, I consider that sufficient excuse to learn a language.
With math, I have enough background to figure stuff out from context. It
would be interesting to see whether I can do it in chemistry.
--
Ignorantly,
Allan Adler <ara@zurich.csail.mit.edu>
* Disclaimer: I am a guest and *not* a member of the MIT CSAIL. My actions and
* comments do not reflect in any way on MIT. Also, I am nowhere near Boston.
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N:dlzc D:aol T:com (dlzc)
science forum Guru


Joined: 25 Mar 2005
Posts: 2835

PostPosted: Fri Mar 25, 2005 2:17 am    Post subject: Re: Why is water clearer near the equator? Reply with quote

Quote:
When I see ocean water in Ocean City Maryland, it's
dark brown-green. When I went to Cancun Mexico,
it's clear blue-green. Whenever I see pictures of
vacation spots near the equator, they always have
nice clear blue-green water. Why?

I think it has been nailed with:
- warmer (lower gas solubility, including CO2)
- lack of nutrients to support algae growth

David A. Smith
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