Acta Phys. -Chim. Sin. ›› 1989, Vol. 5 ›› Issue (01): 10-14.doi: 10.3866/PKU.WHXB19890104

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Analysis of Axially Symmetric Molecular Tumbling and Methyl Internal Rotation Rates of Morphine by 13C Spin-Lattice Relaxation Time T1

Wang Dehua; Levy,George C.   

  1. Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics, Academia Sinica, China; Department of Chemistry, Syracuse University, USA
  • Received:1987-06-10 Revised:1987-11-16 Published:1989-02-15
  • Contact: Wang De-Hua

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Abstract: ~(13)C relaxation parameters of morphine in solution were measured at 90.1 and 62.9 MHz. An axially symmetric rotational model was applied to calculate the ro- tational rates.The calculated rotational rates are 8.6×10~9 revolution s~(-1) about the principal X-axis and 6.1×10~9 revolution s~(-1) about Y-axis.The N-CH_3 methyl internal rotation rate is 5.7×10~9 revolution s~(-1) and the internal rotation barrier is 4.59 kcal mo1~(-1).