That means that the peak at about 60 (the larger chemical shift) is due to the CH 2 group because it has a more electronegative atom attached. Is it suppose to be doing this? About the Ads. Finally the most downfield will be the single hydrogen on the middle carbon, which is shifted so far downfield due to its proximity to the oxygen. The next downfield should by the hydroxyl hydrogen, which rapidly exchanges in an NMR solution and shows up not as a singlet (s) but as a broad small (bs) peak. Your reply is very long and likely does not add anything to the thread. Your new thread title is very short, and likely is unhelpful. tel: 978-749-8000 800-322-1174 (USA) fax: 978-749-2768 2 ContaCt InformatIon ContaCt CIL by Phone, Fax or e-maIL The CIL Customer Service Department is open Monday-Thursday 8:00 A.M. to 5:30 P.M.; Friday 8:00 A.M. to 5:00 P.M EST. The chemical shifts (d) of solvent signals observed for 1 H NMR and 13 C NMR spectra are listed in the following table. All they say is that a proton such as that will not couple other protons. Your message may be considered spam for the following reasons: JavaScript is disabled. List of chemical shift values for the spectrum: Download file: nmrML: Download file: Dissolution of Standard Samples for NMR Protocol SOP 006 v1: Download file: Conducting 'presat' and 'NOESY' 1D Experiments Protocol SOP 013 v1: Download file You are using an out of date browser. nmr is fun man. Your reply is very short and likely does not add anything to the thread. I just looked really close and it does appear that it is actually a septet. Most probably it should show up as a doublet of a triplet, but if you are looking at a real spectrum not a perfect one use in an organic text one of the peaks might be hard to see. The effect of this is that the chemical shift of the carbon increases if you attach an atom like oxygen to it. Your message is mostly quotes or spoilers. The lowest downfield at 1ppm are the 6 hydrogens of the methyl groups which are a doublet b/c they are next to the one hydrogen on the methylene. It is very likely that it does not need any further discussion and thus bumping it serves no purpose. Tables of 1H and 13C NMR chemical shifts have been compiled for common organic compounds often used as reagents or found as products or contaminants in deuterated organic solvents. This NMR stuff is really starting to piss me off. I can't figure out why this NMR is showing me a pentet for the lone hydrogen in the NMR instead of septet. By: Search Advanced… New SDN Article: Mary Bluthardt PharmD, MBA: Young Pharmacist Profile. By: Search Advanced search… Search engine: XenForo Search; Threadloom Search; Search titles only. Er... actually. It may not display this or other websites correctly. Search engine: XenForo Search; Threadloom Search; Search titles only. Should I feel discouraged SMP and Post-Graduate work won't make-up for my uGPA? unless you hate puzzles...then you are in for hell. Note: In principle, you should be able to work out the fact that the carbon attached to the oxygen will have the larger chemical shift. For a better experience, please enable JavaScript in your browser before proceeding. think of it as a puzzle. The multiplicity is shown in parentheses as 1 for singlet, 2 for doublet, 3 for triplet, etc. Your reply has occurred very quickly after a previous reply and likely does not add anything to the thread. Chemical Shifts of Solvents.....22 Cambridge Isotope Laboratories, Inc. Actually the data you have sound about right. I'm just going to burn this worthless ochem book. NMR for isopropanol(2-propanol) Thread starter Luthertaketwo; Start date Mar 16, 2004; Search . … steps you need to take to apply to medical school,,210, Need advice about competing future Pre-Req classes for Medical School.