tag:blogger.com,1999:blog-6953549091784501422.post8748607787018212695..comments2024-03-18T00:31:58.501-07:00Comments on NMR Analysis, Processing and Prediction: Selective Resolution BoosterCarlos Cobashttp://www.blogger.com/profile/13500275318435740775noreply@blogger.comBlogger4125tag:blogger.com,1999:blog-6953549091784501422.post-7569463134120309142008-02-02T12:55:00.000-08:002008-02-02T12:55:00.000-08:00Dear Carlos, I am experimenting with Res Boost and...Dear Carlos, I am experimenting with Res Boost and I have real life example of peaks of different line width. The problem I do not know how to apply it separately for each segment of the spectra. When I am new to Mnova and when ever i use Res Booster, the resolution is changed for the whole spectra. Any help?Dr.Qandilhttps://www.blogger.com/profile/10137913244722942202noreply@blogger.comtag:blogger.com,1999:blog-6953549091784501422.post-83478190101526718272007-12-27T04:13:00.000-08:002007-12-27T04:13:00.000-08:00You know what I mean: first order multiplets in li...You know what I mean: first order multiplets in liquid phase. Without being generic: in your picture the RB reveals an hidden splitting. Is it authentic or is it an artifact? It looks like the latter, because of the asymmetry, but I can't exclude another reason. Maybe you remember the origin of the spectrum..old swanhttps://www.blogger.com/profile/07038370885036547981noreply@blogger.comtag:blogger.com,1999:blog-6953549091784501422.post-44462704866999420972007-12-27T03:39:00.000-08:002007-12-27T03:39:00.000-08:00You wrote:We know that all NMR signals are symmetr...You wrote:<BR/><BR/><I>We know that all NMR signals are symmetric </I><BR/><BR/>This is just not true. Many (strong coupled) spin systems are not symmetric. Consider, for example an AB3 spin system, can you say it's symmetric?Carlos Cobashttps://www.blogger.com/profile/13500275318435740775noreply@blogger.comtag:blogger.com,1999:blog-6953549091784501422.post-70298984995006798012007-12-25T14:34:00.000-08:002007-12-25T14:34:00.000-08:00The middle picture is intriguing. I mean the one w...The middle picture is intriguing. I mean the one where the ppm scale goes from 5.02 to 4.88. Initially se wee 4 unresolved symmetrical triplets. (We know that all NMR signals are symmetric, unless they are a combination of different signals).<BR/>The traditional Lorentz-Gauss weighting function enhances the resolution without changing the number of lines. The resolution booster reveals a new ANOMALOUS splitting in all the multiplets. I am saying "anomalous" because the symmetry is broken.<BR/>If the splitting can be rationalized, then the RB is a wonderful weapon in our hands. If not, then you'd better warn the reader that RB can easily create peaks from nothing or cancel peaks with the same ease.<BR/>Well, the sine bell does something similar, but it's more symmetric and a little more natural.old swanhttps://www.blogger.com/profile/07038370885036547981noreply@blogger.com