Abstract
A new adduct 4-benzyl piperidinium dihydrogenphosphate monophosphoric acid [C 12 H 16 NH 2 ] 2 (H 2 PO 4 ) 2 H 3 PO 4 , has been prepared and analyzed by X-ray diffraction. This adduct compound cristallizes in the monoclinic system, with the acentric space group P2 1 and the following unit-cell parameters: a = 13.103(3), b = 8.737(4), c = 13.620(3) Å, β = 92.38(2)°, Z = 2, and V = 1557.8(7) Å[3]. The crystal structure has been solved and refined to R = 0.059 and R(w) = 0.069 using 3306 independent reflections. Its structure can be described as inorganic layers of H 3 PO 4 and H 2 PO 4 − entities separated by organic molecules. In this atomic arrangement, H-bonds between the different species play an important role in the tridimensionnel network cohesion. Solid-state13C and 31 P MAS NMR spectroscopies are in agreement with the X-ray structure. Ab initio calculations allow the attribution of phosphorus and carbon signals to the independent crystallographic sites and to the various atoms of the organic groups.
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