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Citation: Wang Dehua, George C.. Analysis of Axially Symmetric Molecular Tumbling and Methyl Internal Rotation Rates of Morphine by ¹³C Spin-Lattice Relaxation Time T₁[J]. Acta Physico-Chimica Sinica, ;1989, 5(01): 10-14. doi: 10.3866/PKU.WHXB19890104 shu

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

1.
Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics, Academia Sinica, China; Department of Chemistry, Syracuse University, USA

Received Date: 10 June 1987
Available Online: 15 February 1989

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

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通讯作者: 陈斌, bchen63@163.com

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