The signs of the long-range spin-spin coupling constants in methyl pyridines as determined by the INDOR technique
The long-range spin-spin coupling constants between the methyl and the ring protons in several methyl pyridines have been determined, with their signs. The INDOR technique was used for this purpose and a systematic method was developed applicable to these spin systems, which were all of the ABCX3 ty...
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| Autores principales: | , |
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| Formato: | JOUR |
| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_00222364_v8_n1_p101_Kowalewski |
| Aporte de: |
| Sumario: | The long-range spin-spin coupling constants between the methyl and the ring protons in several methyl pyridines have been determined, with their signs. The INDOR technique was used for this purpose and a systematic method was developed applicable to these spin systems, which were all of the ABCX3 type. It was found that 6JH,CH3 and4JH,CH3 are negative, while 5JH,CH3 is positive, with |4J|>|6J|>|5J|. These results show the same trend as shown by investigations of previous authors in other cyclic compounds. © 1972. |
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