High-resolution carbon-13 nuclear magnetic resonance spectra and structure of amorphous and crystalline forms of stereoregular poly(methyl methacrylate)s

1990 ◽  
Vol 23 (12) ◽  
pp. 3042-3051 ◽  
Author(s):  
J. Spevacek ◽  
B. Schneider ◽  
J. Straka

1997 ◽  
Vol 30 (8) ◽  
pp. 2386-2390 ◽  
Author(s):  
Edward E. Waali ◽  
John D. Scott ◽  
J. Michael Klopf ◽  
Yuli Vladimirsky ◽  
Olga Vladimirsky


Some general properties of ABCX -type spectra are discussed. It is shown that it is possible to deduce from such spectra the relative signs of all inter-nuclear coupling constants. Analyses are presented of the hydrogen (proton) spectra from the vinyl groups of vinyl fluoride and 3-methylbut-l-ene, and of the fluorine spectrum of the former molecule. It is shown that all HF coupling constants in vinyl fluoride are of the same sign as the cis and trans HH coupling constants.





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