organic compounds
2,2,2-Trinitroethanol, C2H3N3O7, at 100 (2) K has Z′ = 2 in the space group P21/c. The structure displays intramolecular O—HO hydrogen bonds, as well as intermolecular O—HO and C—HO hydrogen bonding; the O—HO hydrogen bonds, forming R44(8) rings, and dipolar nitro–nitro interactions account for the high density of 1.839 Mg m−3.