Crystal and molecular structure of disarcosine hydrobromide

Disarcosine hydrobromide, C₆H₁₅N₂O₄ ⁺Br^–, crystallizes in the orthorhombic space groupPca2₁ with eight formula entities per unit cell of dimensionsa = 23.79,b = 6.18, andc = 15.40 Å, that is, two disarcosine molecules in the asymmetric unit. The structure was solved by the heavy-atom method using three-dimensional visually estimated X-ray data, and refined by the block-diagonal least-squares method to a finalR value of 0.11. The molecules are held together by a network of hydrogen bonds of the types N-H Br, N-H O, and O-H O.