parahadi

Ortho-H H H H meta-H H para-Table 4 NMR data for C11H15NO2 number of. 1-X2-Y-C 6 H 4. Aromatics J para 0-1 Hz. Ortho meta para nmr coupling . 2 TECH 711Using Nuclear Magnetic Resonance Spectroscopy to Identify an Unknown Compound. The expansion shows the spin-spin coupling pattern arising from the para-fluorine coupling to the 2 meta-fluorine and 2 ortho proton nuclei. This is referred to as meta or 4J coupling. Although there is not an example in this molecule if two protons are three carbons apart they are para. For para-dichlorobenzene there should be only one signal. 4 A small signal will be observed for the ipso-carbon C 1 the carbon with the ligand directly attached a medium sized signal for the para C-atom C 4 and two tall peaks for the ortho C-atoms C 2 and meta C-atoms C 3. 22 Coupling with a Benzene Ring with Three Substituents. 12 Meta-Coupling Has a Low J-Value. To a simple first order approximation the appearance of the signals for all 4 1H-atoms are