4′,4′,6′,6′-Tetra­chloro-3-(4,6-dimethyl­pyridin-2-yl)-3,4-dihydro­spiro­[1,3,2-benzoxaza­phosphinine-2,2′-(2λ⁵,4λ⁵,6λ⁵-cyclo­triphosphazene)]

The title compound, C₁₄H₁₄Cl₄N₅OP₃, is a phosphazene derivative with a bulky substituent attached through a spiro junction. The C₃NPO ring at the spiro junction has a twist–boat conformation, while the phosphazene ring has a flattened-boat conformation. The P_spiro atom is likely to be stereogenic.

7,11-(Butane-1,4-diyldioxydi-o-phenyl­enedimethyl­ene)-6,6-dichloro-4,4-bis­(pyrrolidin-1-yl)-2λ⁵,4λ⁵,6λ⁵-triphosphaza-1,3,5,7,11-penta­aza­spiro­[5.5]undeca-1,3,5-triene

The title compound, C₂₉H₄₂Cl₂N₇O₂P₃, is a phosphazene derivative with a bulky substituent attached through a spiro junction with two pyrrolidine rings. The six-membered C₃N₂P ring has a chair conformation, while the phosphazene ring has a slight envelope conformation. The two N atoms in the C₃N₂P ring are likely to be stereogenic.