1,1′-(Diselanediylbis{[P,P-diphenyl-N-(tri­methyl­sil­yl)phospho­rimido­yl]methanylyl­idene})bis­[1,1-diphenyl-N-(tri­methyl­sil­yl)-λ⁵-phosphanamine] pentane disolvate

The title compound, C₆₂H₇₈N₄P₄Se₂Si₄·2C₅H₁₂, is made up of two [SeC(PPh₂NSiMe₃)(PPh₂NHSiMe₃)] units related by an inversion center situated at the mid-point of the diselenide bond. It crystallized with two disordered mol­ecules of pentane used as solvent of crystallization. It is a rare example of an anti­periplanar diselenide and exhibits a long Se—Se bond of 2.4717 (8) Å. The Se—C bond length of 1.876 (5) Å is short in comparison with the range of values found for other diselenides (1.91–1.97 Å). The mol­ecule exhibits two intra­molecular N—H...N hydrogen bonds. In the crystal, there are no significant inter­molecular inter­actions present. One of the Me₃Si– groups is disordered over two positions with a refined occupancy ratio of 0.708 (8):0.292 (8). The contribution of the disordered solvent to the scattering was removed with the SQUEEZE option of PLATON [Spek (2009). Acta Cryst. D65, 148–155]. The solvent contribution has been included in the reported mol­ecular weight and density.