Mechanism of chemical exchange between labile protons (OH, NH, SH)

1 0 19
answers votes views
Hello All Does anyone know of any good articles dealing with the mechanisms of labile proton exchange in non-aqueous so...
Posted: Craig Grimmer 31 / Updated: Arkadiusz Leniak 182 15 hours ago

Topshim error

1 0 33
answers votes views
HELLO all nmr wikier,I am facing problem in runing topshim on bruker 500Mhz using topspin 2.1 it finishes with error (fi...
Updated: feroon 21 2 days ago

noisy hmqc and hmbc spectra

2 0 70
answers votes views
Hey all! We've got a serious problem because with our new probe (5mm bbo bruker) the t1 noise in the heteronuclear corr...
Posted: apophis 1 / Updated: Pete Gierth 376 Feb 25 at 14:06

Choice of relaxation delay time (d1) in 2D experiments.

1 0 57
answers votes views
Hi, Most people tend to use a lower d1 for 2D than for 1D. Help me understand why. Furthermore, supposing you know you...
Posted: gravatar 61 / Updated: Pete Gierth 376 Feb 25 at 14:18

log: Failed to find Z0 - low s/n

1 0 66
answers votes views
Hi, everybody! I met a problem on Varian 400 MR: DMSO samples don't lock by "find Z0" button, but I can find lock signal...
Updated: Ilya N 1 Feb 17 at 18:35

Coherence transfer pathway for Magic sandwich echo

0 0 79
answers votes views
Hi, I am writing the pulse sequence for magic sandwich echo*, but I am stuck with the phase cycle since I don't have a ...
Updated: Traveller 1 Feb 15 at 15:59

Any decent nmr processing software for free?

5 0 139
answers votes views
Hello people, Does anyone know of any free NMR software (no trials, I can't stand it anymore) that is robust enough to ...
Posted: gravatar 61 / Updated: Craig Grimmer 31 yesterday

Parameters for zgesfpgp 1d experiment (flipback watergate) on Bruker

1 0 204
answers votes views
Hi , Does any one know how to set up the zgesfpgp 1d experiment (flipback water gate) on Bruker. I am looking for p29 du...
Posted: sri 71 / Updated: Clemens Anklin 416 2 days ago

building chains of resonance groups from connectivities

0 0 47
answers votes views
Greetings, Given a dictionary of connectivities of the following form: residue i -> possible residues i-1 : 54 -&g...
Posted: Thomas 1 Feb 07 at 11:36

How do I perform a 2D C-13-C-13 spectrum simulation?

0 0 54
answers votes views
I am new to NMR pipe and was wondering how to perform a carbon-13 carbon-13 simulation in NMR pipe? For example, what th...
Posted: epsaliba 1 Feb 06 at 07:28

Can anyone point me towards a waterlogsy tutorial for bruker?

0 0 122
answers votes views
Hello people, It's all in the title. ...
Posted: gravatar 61 Feb 02 at 08:15

adequate NMR

0 0 96
answers votes views
Hi, I am really confused about reading the adequate 1J(CC) results, Can anyone help me with that? What is the differenc...
Posted: Hessen 1 Jan 29 at 14:57

ADC value, help!!!

1 0 94
answers votes views
ADC value in Bruker 1T, please tell me how to get it? ...
Posted: Huong Nguyen 1 / Updated: Ulrich Haunz 212 Feb 09 at 07:37

Measurement of very short T2

1 0 132
answers votes views
Hello, I'm measuring T2 in paramagnetic materials. These values are very short (0.5-5 ms), and I have to use very short...
Posted: A K 1 / Updated: Jeffreyyyy 1 Feb 27 at 12:48

how many percent peak in NH HSQC enough to solve structure?

1 0 149
answers votes views
Hello everyone, I have a stupid question and often confuse me. We often meet peak missing in 15N H HSQC,but usually ho...
Posted: chengkun wang 1 / Updated: sekhar Talluri 601 Feb 14 at 23:21

Predicting aquisition time needed depending on sample concentration

2 0 4k
answers votes views
Hi , is there a way of predicting aquisition time needed depending on sample concentration in order to get a decent spe...
Posted: gravatar 61 / Updated: Manolis Matzapetakis 11 Jan 14 at 08:33

bigger MAS-NMR spectrum as irradiation window

0 0 355
answers votes views
Hi, I have a sample with a very very big CSA which is broader than my irradiation windows, so I have to acquire my dat...
Posted: Thiazole 11 Dec 16 '14 at 13:05

J-value command

2 0 196
answers votes views
Hi I have a 500MHz BRUKER NMR. How I can access to J-value at COSY experiment? what's that command? ...
Posted: Saeed 1 / Updated: PQdotL 11 Dec 16 '14 at 16:12

problem with large dosy files

3 0 264
answers votes views
Hello, I run DOSY expt successfully but my dosy files are very massive and they take up large amounts of disk space. Ho...
Updated: elham 3 Jan 16 at 07:57

Topspin: usage of l0 and d0

2 0 303
answers votes views
Dear all, In topspin, what's the initial value for l0, 0 or 1? what's the initial value for d0, 0 or in0? Thanks in ad...
Updated: Frey 61 Dec 12 '14 at 01:14

1H-15N CSP

0 0 315
answers votes views
I have a basic question. Why or when should one use deviation from average chemical shift change rather than absolute va...
Posted: Mahavir Singh 1 Nov 27 '14 at 05:10

1H-15N HMBC of small molecules

1 0 202
answers votes views
When I used the automatic peak picking function of Topspin for picking the cross peaks in a 1H-15N HMBC spectrum, two cr...
Updated: Bhanu 1 Nov 27 '14 at 20:23

Running a wet sequence

2 0 321
answers votes views
Hi, I am trying to run a wet sequence but I'm having trouble getting good results on a sample with 90:10 water:methanol...
Posted: gravatar 61 / Updated: Pete Gierth 376 Dec 05 '14 at 10:35

coupling constants

3 0 249
answers votes views
Hi, does anybody know 1H-79Br coupling constants? I found in literature only 13C-79Br coupling constants! Thank you, Mar...
Posted: gugica 1 / Updated: Arkadiusz Leniak 182 Dec 07 '14 at 02:28

What is the actual point of dummy scans?

3 0 414
answers votes views
Hi, I was wondering why so many pulse programs use dummy scans. Correct me if I'm wrong but I think dummy scans are supp...
Posted: gravatar 61 / Updated: Pete Gierth 376 Dec 05 '14 at 10:44

Frequency of signal in the second dymension

0 0 2k
answers votes views
Let me consider a proton experiment done on a 500 MHz spectrometer. The signal coming from the sample has a frequency of...
Posted: PQdotL 11 / Updated: dstephenson 56 Dec 16 '14 at 06:27

Inverse FT of NUS data

3 0 288
answers votes views
Does anyone know the way to create a full ser file from Bruker NUS processed data? I want to do this so that others (wi...
Posted: John Hollerton 96 / Updated: Pete Gierth 376 Dec 05 '14 at 11:19

BSMS error message

3 0 349
answers votes views
Hi what is the HOLD LOCK message on BSMS key pad? How can I fix it? Thanks ...
Posted: elham 3 / Updated: Pete Gierth 376 Jan 22 at 02:39

Weak NOE signals, serious t1 noise

5 0 404
answers votes views
Since my university does not have a professional spectroscopist, I am a new learner of NMR, and I really have no one els...
Posted: Elvis 1 / Updated: RuudA 11 Nov 02 '14 at 07:22

Why so much spam?

3 3 292
answers votes views
Hi, I really like this forum and I am harrowed to see it so spammed. We should find a way to end this(maybe more admins...
Posted: gravatar 61 / Updated: Ulrich Haunz 212 Oct 24 '14 at 07:09

19F 2D experiments

3 0 330
answers votes views
Hi, I would like to run some 19F NOESY, and 19F-1H correlation experiments on a totally fluorinated sample (no H) with a...
Posted: AnneBaudouin 1 / Updated: RuudA 11 Nov 02 '14 at 07:44

NH---O hydrgen bond detection in N-(2-methoxyphenyl)benzamide

1 0 4k
answers votes views
I'd like to know if there are further NMR spectroscopic methods to detect NH---O hydrogen bond in N-(2-methoxyphenyl)ben...
Posted: Alessia 1 / Updated: Arkadiusz Leniak 182 Oct 24 '14 at 00:48

topshim error 84

1 0 310
answers votes views
I tried to perform topshim on my AV-300 but it say : "BsmsRCBSlope - setting RCB ramp failed - Error 84:BSMSExcessive Co...
Posted: Bourdreux Flavien 1 / Updated: Kirk Marat 695 Oct 14 '14 at 14:28

Measuring T1 for a low concentration (1mM) compound in water.

1 0 2k
answers votes views
Hi, I'm trying to measure T1 for a compund at 1mM in water using t1ir. Seeing how my concentration is so low, phasing m...
Posted: gravatar 61 / Updated: Ulrich Haunz 212 Oct 23 '14 at 08:39

TOCSY of peptide in micelle

0 0 1k
answers votes views
Hi, I am a PhD student starting in NMR and I have two questions. I have a problem with a TOCSY and natural abundance ...
Updated: paul atray 1 Sep 17 '14 at 10:16

au for 1H and 31P with iexpno and ssleep for kinetics

1 0 595
answers votes views
hi there. I want to establish an au with the following content: I want to measure 1H and 31P make ssleep (userdefined)...
Posted: charlez miller 1 / Updated: Ulrich Haunz 212 Sep 22 '14 at 06:25

setting Z0 on agilent nmr equipment

0 0 236
answers votes views
I use an agilent 400 MHz equipment. Would like to know how to set the Z0 to around -3500 ...
Posted: olatomide fadare 1 Sep 11 '14 at 16:15

polymer NMR

1 0 1k
answers votes views
Why are NMR peaks of flexible polymers usually broad? Is it due to the intramolecular proton J coupling among different ...
Posted: timlo 1 / Updated: Arkadiusz Leniak 182 Sep 09 '14 at 10:05

Which Bruker HSQC program do you use?

5 0 943
answers votes views
Hello, could you tell me which HSQC and E-HSQC program are recommendable ? These are Bruker HSQC pulse programs: hsqcp...
Posted: lithiumamide 1 / Updated: RuudA 11 Sep 10 '14 at 11:46

Oxford Instruments 2.2K 800/63 pumped magnet

1 0 777
answers votes views
Dear all, our Oxford 800 Mhz pumped magnet is monitored using a windows 95 pc. The autodial is still running but we wer...
Posted: Ruud 1 / Updated: RuudA 11 Sep 25 '14 at 03:37

Spam that is lately spawning in wiki

2 4 791
answers votes views
Greetings, I want to ask if someone knows what's going on in here with this spam about FIFA, some online games, etc. ? ...
Updated: Arkadiusz Leniak 182 Sep 23 '14 at 13:08

Tool for Subsampling Uniformly-Acquired Data to Mimic NUS Spectra

1 0 5k
answers votes views
Hello all, I have several 2D and 3D data sets acquired using Bruker spectrometers in the standard uniform sampling fash...
Updated: ChemMJW 99 Aug 23 '14 at 20:43

what does autoshim in the topspin bsms do?

1 0 556
answers votes views
Hi, in the bsms gui there's an autoshim button. What does this function do exactly? Is it similar to topshim or is it a...
Posted: gravatar 61 / Updated: Ulrich Haunz 212 Aug 20 '14 at 06:16

Tool to extract several NMR spectra into text file format?

2 0 416
answers votes views
Hi As a newbie in the NMR world I hope you guys can help me out with a simple Q: I have 104 1D spectra I would like to t...
Posted: Michael 1 / Updated: John Hollerton 96 Sep 10 '14 at 03:36

15N 90 degree hard pulse calibration

4 0 14060
answers votes views
Greetings, I want to ask for some advice in matter of 15N hard pulse calibration on Bruker machines. I'm working on Avan...
Updated: Arkadiusz Leniak 182 Aug 25 '14 at 04:18

vnmrj spectra in mnova

3 0 604
answers votes views
I have been trying to open varian vnmrj spectra in mnova software to workup the spectra, but I keep getting error messag...
Posted: Carolyn Shetter 1 / Updated: Ulrich Haunz 212 Aug 13 '14 at 05:09

Topspin 2.1 error message with Windows 7 OS

3 0 1k
answers votes views
Hi all, I have been running TopSpin 2.1 on my Windows 7 32-bit OS for the last few years and now am getting this annoyin...
Posted: Olivia 1 / Updated: Ulrich Haunz 212 Nov 14 '14 at 03:16

why choloroform gives a negative triplet instead of a positive

3 0 5k
answers votes views
Hello, why choloroform gives a negative triplet instead of a positive(just one hydrogen on the carbon) in DEPT 135. Can ...
Updated: zikoooo 3 Jul 29 '14 at 01:20

How to integrate CDCl3 (d-chloroform) peak area which is overlapped with other peaks?

4 0 3k
answers votes views
Hi All, I would like to get suggestion about how to integrate the peak area of CDCl3 which is overlapped with other pea...
Posted: Jiping Yang 1 / Updated: John Hollerton 96 Sep 10 '14 at 03:53

Air dryer system issues

2 0 7k
answers votes views
We have a pressure-swing adsorption air dryer that is identical to the one shown here on the NMR wiki (Balston 75-20, cu...
Posted: slongwell 3 / Updated: Jerry Hirschinger 189 Jul 23 '14 at 06:50
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