Elimination Reactions. VII. A Comparison of Some Eliminations in Open-chain and Cyclic Systems

1957 ◽  
Vol 79 (7) ◽  
pp. 1593-1597 ◽  
Author(s):  
F. G. Bordwell ◽  
Phillip S. Landis
Keyword(s):  
Open Chain ◽  
Cyclic Systems ◽  
Elimination Reactions

Über Phosphazene XXXV, 31P-NMR-Untersuchungen VIII

1970 ◽  
Vol 25 (12) ◽  
pp. 1364-1370 ◽  
Author(s):  
Alfred Schmidpeter ◽  
Klaus Schumann
Keyword(s):  
Linear Function ◽  
31P Nmr ◽  
Degree Of Substitution ◽  
Amino Groups ◽  
Open Chain ◽  
Wide Range ◽  
Cyclic Systems

All accessible NMR shifts δ31P of phosphorus surrounded by four nitrogen atoms are compiled systematically. They cover the relatively wide range from -40 to +50 ppm. All shift differences observed correlate well with changes in nitrogen hybridization: in the order p3 → sp3 → sp2 → sp for nitrogen δ31P (N4) is shifted to a higher field. In particular, δ31P (N4) is a linear function of the degree of substitution, when phosphazeno groups are substituted by amino groups in open chain or cyclic systems. This is also true of δ31P (04) in alkoxy or phenoxy/phosphoroxy substitution series

Elimination Reactions in Cyclic Systems. VI. Reaction of Iodide Ion with Cyclic trans-Dibromides

1956 ◽  
Vol 78 (23) ◽  
pp. 6072-6075 ◽  
Author(s):  
Joseph Weinstock ◽  
Sheldon N. Lewis ◽  
F. G. Bordwell
Keyword(s):  
Iodide Ion ◽  
Cyclic Systems ◽  
Elimination Reactions
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