5,5‐Dimethyl‐2‐[6‐methyl‐2‐(methylsulfanyl)pyrimidin‐4‐yloxy]‐1,3,2‐dioxaphosphorinane‐2‐thione

The title compound, C₁₁H₁₇N₂O₃PS₂, is a cyclic thio­phos­phoryl pyrimidine derivative exhibiting insecticidal properties. The crystal structure determination gives evidence for the presence of the thione isomer of the compound. The pyrimidine nucleus is planar and its substituents have small deviations from the least‐squares plane. The dioxaphos­phorinane ring adopts a chair conformation. The lack of classical hydrogen bonds and the weak intermolecular interactions lead to a `loose' packing characterized by channels in the structure.