K2PtCl4 is almost impossible to observe. The relaxation due to the
immense chemical shift anisotropy (tens of thausands of ppm) is very
efficient.
Use K2PtCl6 instead. It's easy to measure, solid or liquid.
Juergen Schulte
On Sat, 24 Feb 1996, Michael D. Mosher wrote:
> Dear All,
>
> I apologize for the cross-posting.
>
> We have a Bruker WM-360 (360MHz for 1H), widebore. I've tuned one of our
> 5mm BB probes to Pt (but can only get a 5:1 tune as measured by O-scope).
> Pt(II) has a spin 1/2, relaxation times near 1.3-0.5 sec, but a 5000ppm
> window.
> Using a 1.0 M K2PtCl4 in D2O sample, I tried to obtain a reference peak.
> Parameters were: SW 10000Hz, PW 10us, RD 2s, RG 200, PR H 1 (we have a 2 bay
> preamp, so the BB preamps were plugged into both slots), SF and SY were set
> correctly, SI 16K. The reflected signal was >20Watts, even though the probe
> was tuned as best as it could be by O-scope. After 64 pulses, we didn't see a
> thing except for noise.
>
> Does anyone have the appropriate parameters for a Bruker (using DISNMR on
> an ASPECT 3000) system? We desperately want to do Pt, Cd, and maybe Pd NMR
> (though we know the problems with Pd NMR.) ANY help would be appreciated.
>
> Thanks, in advance,
> Mike
>
> Michael D. Mosher
> Assistant Professor / Manager NMR Lab
> Department of Chemistry
> University of Nebraska at Kearney
> Kearney, NE 68849-1150
>
> Ph: (308) 865-8491
> mosherm@platte.unk.edu
>
>
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Juergen Schulte ! !
NMR Specialist U
Department of Chemistry ~
SUNY Binghamton Phone: (607) 777-4405
Binghamton, NY 13902-6016 Fax: (607) 777-4478
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schulte@binghamton.edu schulte@chemiris.chem.binghamton.edu
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