Phosphorus-31 nuclear magnetic resonance spectrum of pentamethylcyclopentaphosphine. Evidence for a large stereochemical dependence of the 1J(PP) spin-spin coupling

1973 ◽  
Vol 95 (19) ◽  
pp. 6498-6500 ◽  
Author(s):  
J. P. Albrand ◽  
D. Gagnaire ◽  
J. B. Robert
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Nuclear Magnetic Resonance Spectrum ◽  
Resonance Spectrum ◽  
Spin Coupling ◽  
Spin Spin Coupling ◽  
Nuclear Magnetic

High-resolution nuclear-magnetic-resonance spectra of hydrocarbon groupings I. Some dichloro-propenes

1959 ◽  
Vol 252 (1271) ◽  
pp. 488-505 ◽  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
High Resolution ◽  
Resonance Spectrum ◽  
Coupling Constants ◽  
Spin Coupling ◽  
Nuclear Magnetic Resonance Spectra ◽  
Spin Coupling Constants ◽  
Spin Spin Coupling ◽  
Nuclear Magnetic

An analysis has been made of the high-resolution nuclear-magnetic-resonance spectrum given by the hydrogen nuclei of 2:3-dichloropropene-l and cisand trans 1:3-dichloropropene-1. The spectra at 40 Mc/s of the 1:3-dichloropropenes were analyzed by means of the theory for ABX 2 developed here; the 16·2 Mc/s spectra were analyzed according to the ABC 2 theory by means of a digital computer. It is concluded that the ‘long-range’ spin-spin coupling constants between hydrogen nuclei on carbon atoms 1 and 3 of the 1 : 3-dichloropropenes are of opposite sign to the remainder. A correlation of these results with earlier work on butene-1 by Alexander (1958) leads to analogous conclusions for this molecule also.

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