STRUCTURE OF DIMETHYLETHANOLAMMONIUM DIHYDROGENMONOPHOSPHATE MONOHYDRATE

1-Hydroxy-2-methyl-2-propylammonium dihydrogenphosphate monohydrate, C4H12NO+.-H2PO4-.H2O, M(r) = 205.15, monoclinic, P2(1)/n, a = 16.542 (3), b = 9.170 (2), c = 6.192 (3) angstrom, beta = 92.63 (5)-degrees, V = 938.3 (9) angstrom 3, Z = 4, D(x) = 1.452 Mg m-3, lambda(Ag K-alphaBAR) = 0.5608 angstrom, mu = 0.161 mm-1, F(000) = 440, T = 295 K, final R = 0.034 for 2123 unique reflections. Wide ribbons of C4H12NO+ groups and water molecules, and H2PO4- infinite chains parallel to b alternate along the c direction. The cohesion between the different groups is maintained by a three-dimensional network of hydrogen bonds.