Hi Ted,
If you adapted the HMBC parameter set from another nucleus, the usual
candidate is 1 SR being set to some unreasonably large value. Set it to zero
and wpar the parameter set so its correct for the next time you use it.
Thanks
Geoff
________________________________
> From: main_at_ammrl.groups.io on behalf of Wiessner, Tedd via groups.io
> Sent: 17 April 2026 18:40
< To: main_at_ammrl.groups.io <main_at_ammrl.groups.io>
> Subject: [External] [AMMRL] Silicone-HMBC help
Hi All,
We are trying to implement a silicon-HMBC experiment and are having trouble
getting the Si-axis to be in the range we want.
The sweep width we were going for was 200 ppm centered at -40 ppm, but the
spectra we keep getting are labeled as ranging from 960,777 to around 960,384 ppm
(SW~400 ppm). Does anyone have any ideas why this is happening and how to fix it?
I feel like I am missing something simple but am at a loss.
For reference, the spectrum below is of tetraethoxy silane (~-81.8 ppm).
Thanks!
Best,
Tedd
Tedd C. Wiessner, PhD
Senior Scientist I, Pathways Manager, Analytical Lab | H.B. Fuller Company
1200 Willow Lake Blvd | Vadnais Heights | MN | 55110 | USA
-=-=-=-=-=-=-=-=-=-=-=-
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#3396): https://urldefense.com/v3/__https://ammrl.groups=
.io/g/main/message/3396__;!!PvDODwlR4mBZyAb0!Qqbwj9QvG6bnweM-kE-1zM31Lu3WCP=
1sPrjSpb9TP8OnYzDAzximFbGx9xS-KRiKdgBrBI-HBAFhhaRKl1FC6NFBI9DU$
Mute This Topic: https://urldefense.com/v3/__https://groups.io/mt/118891928=
/7559972__;!!PvDODwlR4mBZyAb0!Qqbwj9QvG6bnweM-kE-1zM31Lu3WCP1sPrjSpb9TP8OnY=
zDAzximFbGx9xS-KRiKdgBrBI-HBAFhhaRKl1FC6NrsWA9w$
Group Owner: main+owner_at_ammrl.groups.io
-=-=-=-=-=-=-=-=-=-=-=-
Received on Sat Apr 18 2026 - 08:01:42 MST