The Influence of Short-Range Geometry on the 31P Chemical-Shift Tensor in Protonated . Phosphates

Hydrothermal Synthesis, Single-Crystal Structure Analysis, and Solid-State NMR Characterization of Zn2(OH)0.14(3)F0.86(3)(PO4)

“…A computer deconvolution of the spectrum gives the following isotropic chemical shifts for the four P atoms: "6.9(1) ppm, 5.4(1) ppm, 3.4(3) ppm, and 2.8(2) ppm. These values and the absence of signi"cant chemical shift anisotropies for the four P sites are in good agreement with chemical shift data reported for orthophosphates (29,30). The P MAS NMR spectrum for the sample prepared in the D O medium (not shown) is very similar to the spectrum in Fig.…”

Crystal structure and spectroscopic studies of a new organic monohydrogenmonophosphate dihydrate

“…It exhibits a single resonance peak. The signal chemical shift value (0.08 ppm) agrees with those corresponding to monophosphates (between -10 and + 5 ppm) [18][19][20][21][22][23][24]. The existence of a single peak in the spectrum clearly indicates the presence of only one crystallographic site in the unit-cell of this compound, which agrees with the X-ray results.…”

Structure of Melaminium Dihydrogenpyrophosphate and Its Formation from Melaminium Dihydrogenphosphate Studied with Powder Diffraction Data, Solid-State NMR, and Theoretical Calculations

“…A Herzfeld-Berger analysis 34 of the sideband pattern for the two inequivalent phosphorus sites in MPy results in chemical shift anisotropies of (δ 11 , δ 22 , δ 33 ) ) (65, -8, -86) ( 2 ppm and (67, -11, -91) ( 2 ppm, which are in good agreement with literature data for dihydrogen pyrophosphate salts, further substantiating the assignments. 35,36 The 13 C CP-MAS spectrum of MPy (not shown here) shows two resonances (2:1) identical with the 13 C spectrum of MP, 14,15 leading to the conclusion that the carbon atoms in the melamine ring are inequivalent, in line with protonation of one endocyclic nitrogen per melamine, thus leaving the protonation scheme from MP to MPy unchanged.…”