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The cyclic compound 2,4-bis(dimethylamino)-1,3-diethylcyclodiphosphazane-2,4-dithione [systematic name: 2,4-bis(dimethylamino)-1,3-diethyl-1,3,2λ 5 ,4λ 5 -diazadiphosphetidine-2,4-dithione], C 8 H 22 N 4 P 2 S 2 or [EtNP(S)NMe 2 ] 2 , is member of a class of mol-ecules that may be used, by virtue of their complexation properties, for the extraction of metals. This compound was characterized in solution by ( 1 H and 31 P) NMR, and in the solid state by energy-dispersive X-ray spectroscopy (EDX) and by X-ray crystallography. In the crystal, the mol-ecule sits on an inversion centre such that the P and N atoms form a centrosymmetric cyclic P 2 N 2 arrangement. The crystal packing is dominated by van der Waals inter-actions. The prevalence of these inter-actions is illustrated by an analysis of the three-dimensional Hirshfeld surface (HS) and by two-dimensional fingerprint plots (FP). The relative contribution of different inter-actions to the HS indicates that the H⋯H contacts account for 74.3% of the total HS area.

Crystal structure and Hirshfeld surface analysis of the new cyclodiphosphazane [EtNP(S)NMe2]2

Crystal structure and Hirshfeld surface analysis of the new cyclodiphosphazane [EtNP(S)NMe₂]₂