Crystal structure of L-serine phosphate

Abstract

The crystal structure of L-serine phosphate (C3O3NH7 · H3PO4) is determined by single-crystal X-ray diffraction. The unit cell parameters are as follows: a = 9.134(5) A, b = 9.489(5) A, c = 4.615(5) A, γ = 99.54(5)°, space group P21, and Z = 2. The amino group of serine is protonated by a hydrogen atom of the phosphoric acid. The H2PO 4 1− ions are linked by hydrogen bonds into infinite ribbons aligned along the twofold screw axes. The ribbons form layers alternating with layers of serine molecules, which are directly linked by hydrogen bonds.