31P and 15N solid-state nuclear magnetic resonance spectroscopic study of some monophospha-lambda 5-azenes.
31P Cross-polarization magic-angle spinning nuclear magnetic resonance (CP-MAS NMR) spectra of eight monophospha-lambda 5-azenes were measured at room temperature. Three of these compounds, with 2-OH substituents, are in principle capable of taking part in the equilibrium process. However, only the open form, tautomer A, is found in the present study. 15N CP-MAS NMR spectra support the results. The most shielded component of the 31P chemical shift tensor lies in the direction of the P = N bond.
Institute of Organic Chemistry, Polish Academy of Sciences, Warsaw.
W
W
Domalewski
L
L
Stefaniak
M J
MJ
Potrzebowski
G A
GA
Webb
D001391:Azo Compounds / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy
D001391:Azo Compounds