Crystal structure of N-(2,2,2-trichloro-1-hydroxyethyl)formamide

Abstract

The title compound, C3H4Cl3NO2, crystallized with two independent molecules (A and B) in the asymmetric unit. The two molecules have the same conformation; the molecular overlap gives weighted and unit-weight r.m.s. fits of 0.047 and 0.043Å, respectively. The conformation of the N-(hydroxethyl)formamide chains are very similar, as indicated by the C - N(H) - C=O and C - N(H) - C - O(H) torsion angles, which are, respectively, -1.8(3) and -91.5(2)° for molecule A, and -2.1(3) and -95.7(2)° for molecule B. In the crystal, individual molecules are linked by pairs of O - H⋯O hydrogen bonds, forming A-A and B-B inversion dimers with R 2 2(12) ring motifs. The dimers are linked via N - H⋯O hydrogen bonds, forming alternating layers of A and B molecules parallel to the bc plane. Within the layers of B molecules, there are weak C - H⋯Cl hydrogen bonds present.