Tetrakis(2,3,5,6-tetra­fluoro-4-iodo­phenyloxy­methyl)­methane bis­(pyridine N-oxide) monohydrate

The title compound, C₂₉H₈F₁₆I₄O₄·2C₅H₅NO·H₂O, is com­posed of the tetrakis-p-iodo­tetra­fluoroether of pentaeryth­ritol, pyridine N-oxide and water. It is characterized by the presence of both halogen bonds and hydrogen bonds connecting the three components. The two particularly short I⋯O halogen bonds (<2.9 Å) involve one pyridine N-oxide mol­ecule and water. Consistent with the n-σ* character of the I⋯O halogen bond, the shorter the I⋯O interaction is, the greater the lengthening of the corresponding C—I bond. As is often the case in similar compounds, the C—I⋯O angles are approximately linear. The structure shows thin hydro­carbon layers alternating with thick per­fluoro­carbon layers.