Chinese Journal of Magnetic Resonance ›› 1989, Vol. 6 ›› Issue (2): 221-224.
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Li Guowei, Cheng Leifeng, Chen Ruyu
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Abstract: It was found from the 31P NMR spectra that there were cis-and trans isomers in 4,5-dioxO-2-thiO-1,3,2,4-diazadiphospholanes. The chemical shifts of the cis-isomer appeared at highfield with larger 2JPP coupling constant and the trans-isomer at lowficld with smaller coupling constant. It was explained in terms of van der Waals action and conjugated(P→d) π system. The relationship between the 31P NMR chemical shifts and substituent in phenyl is also discussed.
Key words: Diphospholane, 31P-NMR
Li Guowei, Cheng Leifeng, Chen Ruyu. THE 31P NMR SPECTRA OF 4,5-DIOXO-2-THIO-1,3,2,4-DIAZADIPHOSPHOLANE DERIVATIVES[J]. Chinese Journal of Magnetic Resonance, 1989, 6(2): 221-224.
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http://magres.apm.ac.cn/EN/Y1989/V6/I2/221
