From: Ravi Orugunty (rorugunty$##$oragenics.com)
Date: Thu Feb 02 2006 - 13:16:46 EST
Hi Ken,
This is with regards to the formates bound to the Pt, all of the
explainations seem valid. To explain differences in relaxations times as
well as D/H exchange use a different solvent such as d6DMF or d6DMSO or
CDCl3. there should be no exchange in these solvents and therefore should
integrate correctly. Try increasing the delay time while acquiring the
spectrum as well ( cant remember if it is the d1 or d2 delay, ask your
friendly NMR guru he will be able to help) and this will answer your
question of differences in relaxation times as well.
Of course the best and unequivocal evidence would be an X-ray of the
compound i.e if it is crystalline and you are able to grow good crystals.
good luck and let us informed about your results.
ravi
-----Original Message-----
From: everybody-bounces$##$orglist.net
[mailto:everybody-bounces$##$orglist.net]On Behalf Of
everybody-request$##$orglist.net
Sent: Thursday, February 02, 2006 12:05 PM
To: everybody$##$orglist.net
Subject: Everybody Digest, Vol 18, Issue 2
Send Everybody mailing list submissions to
everybody$##$orglist.net
To subscribe or unsubscribe via the World Wide Web, visit
http://two.pairlist.net/mailman/listinfo/everybody
or, via email, send a message with subject or body 'help' to
everybody-request$##$orglist.net
You can reach the person managing the list at
everybody-owner$##$orglist.net
When replying, please edit your Subject line so it is more specific
than "Re: Contents of Everybody digest..."
Today's Topics:
1. Li-HMDS (Kishore Babu Ch)
2. Postdoc position (Luisa Ferreira)
3. Vacancy Pharmachem, dehradun (saurabh vijay)
4. Re: Li-HMDS (Uno Maeorg)
5. Formate NMR (Ken Knott)
----------------------------------------------------------------------
Message: 1
Date: Tue, 31 Jan 2006 20:34:25 -0800 (PST)
From: Kishore Babu Ch <kbchilukuri$##$yahoo.com>
Subject: ORGLIST: Li-HMDS
To: everybody$##$orglist.net
Message-ID: <20060201043425.83077.qmail$##$web50608.mail.yahoo.com>
Content-Type: text/plain; charset=iso-8859-1
Hi friends,
I anybody suggest how to prepare the lithium-HMDS.
bye
ch.k
__________________________________________________
Do You Yahoo!?
Tired of spam? Yahoo! Mail has the best spam protection around
http://mail.yahoo.com
------------------------------
Message: 2
Date: Wed, 01 Feb 2006 14:00:43 +0000
From: Luisa Ferreira <lpf$##$dq.fct.unl.pt>
Subject: ORGLIST: Postdoc position
To: everybody$##$orglist.net
Message-ID: <7.0.0.16.0.20060201135026.01c40d98$##$dq.fct.unl.pt>
Content-Type: text/plain; charset="iso-8859-1"
Postdoctoral position
One postdoctoral position is available to work on
semisynthesis of alkaloids.This position will be
available in early 2007. The application should be completed till June 2006.
Information
Lumsa Ferreira
REQUIMTE Departamento de Qu mmica,
FCT-UNL
2829-516 Caparica
Portugal
Tel.: 351 21 2948300
Fax.: 351 21 294 8550
Email: <mailto:lpf$##$dq.fct.unl.pt>lpf$##$dq.fct.unl.pt
www.dq.fct.unl.pt
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
http://two.pairlist.net/pipermail/everybody/attachments/20060201/56f622c2/at
tachment-0001.html
------------------------------
Message: 3
Date: 1 Feb 2006 17:48:02 -0000
From: "saurabh vijay" <vj_saurabh$##$rediffmail.com>
Subject: ORGLIST: Vacancy Pharmachem, dehradun
To: everybody$##$orglist.net
Message-ID: <20060201174802.8716.qmail$##$webmail64.rediffmail.com>
Content-Type: text/plain; charset="iso-8859-1"
Hi friends,
There is a vacancy available in Dolphin PG institute dehradunIndia, for the
post of Lecturer (M.Sc.with research exp. Or PhD. If you wish to apply,
please forward your resume to vj_saurabh$##$rediffmail.com
Thanks
Saurabh
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
http://two.pairlist.net/pipermail/everybody/attachments/20060201/1a273426/at
tachment-0001.html
------------------------------
Message: 4
Date: Thu, 02 Feb 2006 01:15:49 +0200
From: Uno Maeorg <uno$##$chem.ut.ee>
Subject: Re: ORGLIST: Li-HMDS
To: Kishore Babu Ch <kbchilukuri$##$yahoo.com>, everybody$##$orglist.net
Message-ID: <6.1.1.1.0.20060202011440.01e80e88$##$mega.chem.ut.ee>
Content-Type: text/plain; charset="us-ascii"; format=flowed
Hi,
This is well described in Lambert Brandsma's or Manfred Schlosser's new
book.
Uno
06:34 1.02.2006, Kishore Babu Ch wrote:
>Hi friends,
>
>I anybody suggest how to prepare the lithium-HMDS.
>
>bye
>ch.k
>
>__________________________________________________
>Do You Yahoo!?
>Tired of spam? Yahoo! Mail has the best spam protection around
>http://mail.yahoo.com
>_______________________________________________
>ORGLIST - Organic Chemistry Mailing List
>Website / Archive / FAQ: http://www.orglist.net
>To post a message (TO EVERYBODY) send to everybody$##$orglist.net
>To unsubscribe, send to everybody-request$##$orglist.net the message:
>unsubscribe your_orglist_password your_address
------------------------------
Message: 5
Date: Wed, 01 Feb 2006 18:30:02 -0500
From: "Ken Knott" <esprcorn$##$hotmail.com>
Subject: ORGLIST: Formate NMR
To: everybody$##$orglist.net
Message-ID: <BAY102-F227A3EDEBDC9FCAAC524F2CB0B0$##$phx.gbl>
Content-Type: text/plain; format=flowed
So I've got two formates boud by the oxygen to a Pt... and the adehydic
protons aren't integrating correctly. They should be integrating to 2 as
their are 2 of them... however, they integrate closer to one in several
variants of the compound. All other characterizations indicate that the
compound is correct. Mass spec is exact and the elemental analysis is
correct other than some small error in the H% which seems to be normal...
HPLC show it's 99.5% pure as well.
How can I explain the incorrect integration of the formate H? NMR's have
been done in both CD3OD and D2O.
It has been suggested that it may be exchanging with the D's...
It has been suggested that is may be acidic....
It has been suggested that the spin relaxation rate of those protons may be
different that those of the pyridine protons it's being integrated against
due to the close proximity of the Pt.
Can anyone offer any other suggestions or comments on those above? Possible
experiments to conduct to explain the integration deviance?
Thanks,
Ken
------------------------------
_______________________________________________
ORGLIST - Organic Chemistry Mailing List
Website / Archive / FAQ: http://www.orglist.net
To post a message (TO EVERYBODY) send to everybody$##$orglist.net
To unsubscribe, send to everybody-request$##$orglist.net the message:
unsubscribe your_orglist_password your_address
End of Everybody Digest, Vol 18, Issue 2
****************************************
_______________________________________________
ORGLIST - Organic Chemistry Mailing List
Website / Archive / FAQ: http://www.orglist.net
To post a message (TO EVERYBODY) send to everybody$##$orglist.net
To unsubscribe, send to everybody-request$##$orglist.net the message: unsubscribe your_orglist_password your_address
This archive was generated by hypermail 2.1.4 : Tue Feb 13 2007 - 14:17:01 EST