1,2-Di-4-pyridylethane N,N′-dioxide–acetic acid (1/2)

The title compound, C(12)H(12)N(2)O(2)·2C(2)H(4)O(2), was prepared from 1,2-di-4-pyridylethane, acetic acid, and hydrogen peroxide. The 1,2-di-4-pyridylethane N,N′-dioxide mol­ecule is located on an inversion center. π–π stacking inter­actions between neighboring 1,2-di-4-pyridylethane N,N′-dioxide mol­ecules are observed with a centroid–centroid distance of 3.613 Å, an inter­planar distance of 3.317 Å, and a slippage of 1.433 Å. O—H⋯O hydrogen-bonding inter­actions between 1,2-di-4-pyridylethane N,N′-dioxide and acetic acid mol­ecules result in distinct hydrogen-bonded units made of one N-oxide and two acetic acid mol­ecules. These units are then linked into a three-dimensional network through weaker C—H⋯O hydrogen-bonding inter­actions.