2,4‐[2,2′‐Methylenebis(4‐nitrophen­oxy)]‐2,4,6,6‐tetrachlorocyclo‐2λ5,4λ5,6λ5‐triphosphazatriene (ansa)

The title compound, C₁₃H₈Cl₄N₅O₆P₃, consists of a non‐planar trimeric phosphazene ring and a bulky 2,2′‐methylenebis(4‐nitrophenoxy) side group which predominantly determines the molecular shape. With respect to the corresponding values in the reference compound N₃P₃Cl₆, the endocyclic angle around one P atom is the same, but the exocyclic angle is increased, while the endocyclic and exocyclic angles about another P atom are both decreased. This situation is different from that in other reported phosphazene derivatives.     

Reactions of dithioxo‐1,3,2λ5,4λ5‐dithiadiphosphetanes with antimony(III) alkoxides

New antimony(III) derivatives of dithiophosphonic and trithiophosphoric acids 3a–c and 5 were obtained by the reactions of Lawesson's reagent 1a, its homologue 1b, and the isobutyl homologue of Davy's reagent 4 with antimony(III) alkoxides 2a–c. © 1999 John Wiley & Sons, Inc. Heteroatom Chem 10: 399–403, 1999     

[η6‐1‐Chloro‐2‐(pyrrolidin‐1‐yl)benzene](η5‐cyclopentadienyl)iron(II) hexafluoridophosphate and (η5‐cyclopentadienyl){2‐[η6‐2‐(pyrrolidin‐1‐yl)phenyl]phenol}iron(II) hexafluoridophosphate

In the complex salt [η⁶‐1‐chloro‐2‐(pyrrolidin‐1‐yl)benzene](η⁵‐cyclopentadienyl)iron(II) hexafluoridophosphate, [Fe(C₅H₅)(C₁₀H₁₂ClN)]PF₆, (I), the complexed cyclopentadienyl and benzene rings are almost parallel, with a dihedral angle between their planes of 2.3 (3)°. In a related complex salt, (η⁵‐cyclopentadienyl){2‐[η⁶‐2‐(pyrrolidin‐1‐yl)phenyl]phenol}iron(II) hexafluoridophosphate, [Fe(C₅H₅)(C₁₆H₁₇NO)]PF₆, (II), the analogous angle is 5.4 (1)°. In both complexes, the aromatic C atom bound to the pyrrolidine N atom is located out of the plane defined by the remaining five ring C atoms. The dihedral angles between the plane of these five ring atoms and a plane defined by the N‐bound aromatic C atom and two neighboring C atoms are 9.7 (8) and 5.6 (2)° for (I) and (II), respectively.     

4,4,6,6‐Tetra­chloro‐2,2‐(propyl­ene­dioxy­di‐o‐phenyl­enedi­imino)‐2λ5,4λ5,6λ5‐cyclotriphosphazene

The title compound, C₁₅H₁₆Cl₄N₅O₂P₃, is a cyclo­phosphazenic lariat (PNP‐pivot) ether with a spiro‐cyclic 12‐membered macrocyclic ligand containing two ether O and two N atoms; the phosphazene ring is nearly planar. In the macrocyclic ring, there is a four‐center (trifurcate) N—H⋯O/N—H⋯N hydrogen bond. The relative inner‐hole size of the macrocycle is estimated as approximately 0.95 Å.     

4,4,6,6‐Tetra­chloro‐2,2‐(ethyl­ene­di­oxy­di‐o‐phenyl­enedi­imino)‐2λ5,4λ5,6λ5‐cyclo­triphosphazene

The title ligand, C₁₄H₁₄Cl₄N₅O₂P₃, is a cyclo­phosphazene lariat (PNP pivot) ether with a spiro‐cyclic 11‐membered macrocyclic ring containing two ether O and two N atoms; the phosphazene ring is nearly planar. The macrocyclic ring contains a four‐centred (trifurcate) N—H⋯O/N—H⋯N hydrogen bond, and the relative inner‐hole size of the macrocycle is ∼1.14 Å in radius. The mol­ecules are linked about inversion centres by N—H⋯N hydrogen bonds into centrosymmetric dimers.     

4′,4′,6′,6′‐Tetra­chloro‐3,4‐di­hydro‐3‐(6‐methyl­pyridin‐2‐yl)­spiro­[1,3,2‐benzox­aza­phosphinine‐2,2′‐(2λ5,4λ5,6λ5‐cyclo­triphosphazene)]

The title compound, C₁₃H₁₂Cl₄N₅OP₃, is a phosphazene derivative with a bulky substituted spiro­cyclic ring. The C₃NPO spiro­cyclic ring has a twist‐boat conformation, while the phosphazene ring has a very flattened boat conformation.