N,N'-Bis(ethyl­diphenyl­phosphino)ethyl­enediamine P,P'-dioxide

The mol­ecule of the title compound, C₃₀H₃₄N₂O₂P₂ or Ph₂P(O)N(Et)CH₂CH₂(Et)N(O)PPh₂, has crystallographically imposed centrosymmetry. The P-N bond length of 1.656 (2) Å is less than the accepted value for a single P-N bond. The P-O bonds [1.4818 (18) Å] are also short because of double-bond character.

[Bis(diphenyl­phosphino)amine-κ²P,P′][1,3-bis­(diphenyl­phosphino)propane-κ²P,P′]platinum(II) dichloride dichloro­methane solvate

The title complex, [Pt(C₂₄H₂₁NP₂)(C₂₇H₂₆P₂)]Cl₂·CH₂Cl₂ or [Pt(dppa)(dppp)]Cl₂·CH₂Cl₂, where dppa is bis­(diphenyl­phos­phino)amine and dppp is 1,3-bis­(diphenyl­phos­phino)­propane, has two different chelate rings. The Pt^II atom has a distorted square-planar geometry. The six-membered chelate ring of dppp has a chair conformation. There is a hydrogen bond between the dppa N—H group and a Cl⁻ counter-ion.