Unanswered questions

t1 Increment delay

1 1 6k
answers votes views
Hello all, iam trying to key in the correct value for nd0 for a custom written pulse program. In doing so i ran into con...
Posted: Jana 31 / Updated: Clemens Anklin 416 Jun 30 '12 at 14:28

1H-119Sn HMBC or HMQC

0 1 1k
answers votes views
Dear experts, I want to run 1H-119Sn HMBC or HMQC, but I don't know the name of pulse program in Bruker. Do you know the...
Posted: Hamidreza Samouei 11 Jun 24 '12 at 03:14

Lock at high temperatures

2 1 7k
answers votes views
I am having trouble locking a sample of a polymer dissolved in OCDB at 135 degree's. Can this high temperature interfer...
Posted: Javaslinger 53 / Updated: Gareth Morris 71 Jul 08 '12 at 03:02

How important is calibrating a 90degree pulse for 2D?

2 1 4k
answers votes views
So it is pretty much always recommended to calibrate the 90 for 1H for any 2D experiment... Cosy, Noesy, HSQC, etc... ...
Posted: Javaslinger 53 / Updated: Nikolay Boev 41 Jun 29 '12 at 09:04

Difficulties with wobbing.

4 1 5k
answers votes views
Hello, dear NMR-comrades! I work on Bruker AVANCE II 400 MHz NMR-spectrometer and today I had some troubles with wobbi...
Posted: Alexander Abakumov 11 / Updated: Jerry Hirschinger 199 Jul 16 '12 at 07:55

What will happen if I use long pulse?

7 1 11298
answers votes views
Hello everybody. We have an AVANCE 500 MHz bruker instrument. Unfortunately, our amplifier has been weakened and I can n...
Posted: He 21 / Updated: jkurutz 131 Jul 19 '12 at 06:24

Chemical shift evolution compensation for delays flanked by hard or soft pulses

0 1 1k
answers votes views
Hello all, In a typical 2D experiment, the delay "d0" (t1 increment delay in Bruker) is compensated for the chemical sh...
Posted: Jana 31 Aug 02 '12 at 10:33

multiple-quantum diffusion measurements

1 1 3k
answers votes views
Dear all, My first question here, I hope that someone can help! In a paper describing a method to measure diffusion us...
Updated: Daan 11 Sep 11 '12 at 00:34

Software for 2D Peak Deconvolution/Fitting

2 1 5k
answers votes views
Hello all, I have 1H-15N HSQC spectra that contain pairs of partially overlapped crosspeaks for which I need to extract...
Posted: ChemMJW 99 / Updated: delaglio 1361 Sep 14 '12 at 09:34

Long-range 1H-{15N} coupling (HMBC)

3 1 7k
answers votes views
Hello All I have two examples of what appears to be 6J coupling between 1H and 15N using gradient HMBC experiments with...
Posted: Craig 41 / Updated: Evgeny Fadeev 5771 Feb 16 '13 at 15:17
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