An NMR Study of Unequal Site Exchange of 9-Methyl Group in Triptycene by Spin-Lattice Relaxation and 2D-EXSY Experiments
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An unequal site exchanging system induced by restricted rotation of 9- methyl group in 1,8-dichloro-9-triptycene has been studied by spin-lattice relaxation and 2D-EXSY experiments. The exchange rate obtained from relaxation studies is very well coincident to the result of line shape analysis, and the difference of the relaxation times (T1) in two different sites has an important role to analyze 2DEXSY experimental data.
Abstract
An unequal site exchanging system induced by restricted rotation of 9- methyl group in 1,8-dichloro-9-triptycene has been studied by spin-lattice relaxation and 2D-EXSY experiments. The exchange rate obtained from relaxation studies is very well coincident to the result of line shape analysis, and the difference of the relaxation times (T1) in two different sites has an important role to analyze 2DEXSY experimental data.
참고문헌 (4)
- I, "NMR of Chemically Exchanging Systems" (1980), Academic Press
- Ernst, "Princeple of NMR in One and Two Dimensions" (1987), Clarendon Press
- I, "NMR of Chemically Exchanging Systems" (1980), Academic Press
- Ernst, "Princeple of NMR in One and Two Dimensions" (1987), Clarendon Press